Hubble Finds Dead Stars Polluted With Planetary Debris

The NASA/ESA Hubble Space Telescope has found signs of Earth-like planets in an unlikely place: the atmospheres of a pair of burnt-out stars in a nearby star cluster. The white dwarf stars are being polluted by debris from asteroid-like objects falling onto them. This discovery suggests that rocky planet assembly is common in clusters, say researchers. "Artist's impression of debris around a white dwarf star""[Credit: NASA, ESA, STScI, and G. Bacon (STScI)]"The stars, known as white dwarfs -- small, dim remnants of stars once like the Sun -- reside 150 light-years away in the Hyades star cluster, in the constellation of Taurus (The Bull). The cluster is relatively young, at only 625 million years old.Astronomers believe that all stars formed in clusters. However, searches for planets in these clusters have not been fruitful -- of the roughly 800 exoplanets known, only four are known to orbit stars in clusters. This scarcity may be due to the nature of the cluster stars, which are young and active, producing stellar flares and other outbursts that make it difficult to study them in detail.A new study led by Jay Farihi of the University of Cambridge, UK, instead observed "retired" cluster stars to hunt for signs of planet formation .Hubble's spectroscopic observations identified silicon in the atmospheres of two white dwarfs, a major ingredient of the rocky material that forms Earth and other terrestrial planets in the Solar System. This silicon may have come from asteroids that were shredded by the white dwarfs' gravity when they veered too close to the stars. The rocky debris likely formed a ring around the dead stars, which then funnelled the material inwards.The debris detected whirling around the white dwarfs suggests that terrestrial planets formed when these stars were born. After the stars collapsed to form white dwarfs, surviving gas giant planets may have gravitationally nudged members of any leftover asteroid belts into star-grazing orbits ."We have identified chemical evidence for the building blocks of rocky planets," says Farihi. "When these stars were born, they built planets, and there's a good chance that they currently retain some of them. The signs of rocky debris we are seeing are evidence of this -- it is at least as rocky as the most primitive terrestrial bodies in our Solar System."Besides finding silicon in the Hyades stars' atmospheres, Hubble also detected low levels of carbon. This is another sign of the rocky nature of the debris, as astronomers know that carbon levels should be very low in rocky, Earth-like material. Finding its faint chemical signature required Hubble's powerful Cosmic Origins Spectrograph (COS), as carbon's fingerprints can be detected only in ultraviolet light, which cannot be observed from ground-based telescopes."The one thing the white dwarf pollution technique gives us that we won't get with any other planet detection technique is the chemistry of solid planets," Farihi says. "Based on the silicon-to-carbon ratio in our study, for example, we can actually say that this material is basically Earth-like."This new study suggests that asteroids less than 160 kilometres across were gravitationally torn apart by the white dwarfs' strong tidal forces, before eventually falling onto the dead stars .The team plans to analyse more white dwarfs using the same technique to identify not only the rocks' composition, but also their parent bodies. "The beauty of this technique is that whatever the Universe is doing, we'll be able to measure it," Farihi said. "We have been using the Solar System as a kind of map, but we don't know what the rest of the Universe does. Hopefully with Hubble and its powerful ultraviolet-light spectrograph COS, and with the upcoming ground-based 30- and 40-metre telescopes, we'll be able to tell more of the story."NOTES The two "polluted" Hyades white dwarfs are part of a search of planetary debris around more than 100 white dwarfs, led by Boris G"ansicke of the University of Warwick, United Kingdom. Using computer models of white dwarf atmospheres, Detlev Koester from the University of Kiel in Germany is determining the abundances of various elements that can be traced to planets in the COS data. Seeing evidence of asteroids points to the possibility of Earth-sized planets in the same system. Asteroids are the building blocks of major planets. Planet-forming processes are inefficient, and spawn many times more small bodies than large bodies -- but once rocky embryos the size of asteroids are built, planets are sure to follow. The team estimated the size of the infalling asteroids by measuring the amount of dust being gobbled up by the stars -- about 10 million grams per second, equal to the flow rate of a small river. They then compared that data with measurements of material falling onto other white dwarfs. The Hyades study offers insight into what will happen in the Solar System when the Sun burns out, five billion years from now."Source: ESA/Hubble Information Centre [May 09, 2013]"

Examining Ceres For Alien Life And The Latest On Our Search Of Mars

Welcome! "Alien Life" tracks the latest discoveries and thoughts in the various elements of the famous Drake Equation. Here's today's news:

g STARS - When stars are more massive than about 8 times the Sun, they end their lives in a spectacular explosion called a supernova. The outer layers of the star are hurtled out into space at thousands of miles an hour, leaving a debris field of gas and dust with the potential of turning into habitable worlds. See article.

g ABODES - Plans are being drawn up for a low-cost mission to land on the dwarf planet Ceres. Known as the Ceres Polar Lander, it would examine polar regions and search for alien organisms. See article.

g COSMICUS - NASA's Mars Exploration Rover Spirit has had some recent troubles, but is continuing its mission to explore the surface of Mars. While the rover moves toward new scientific targets, members of the mission team are trying to determine why the rover recently rebooted its computer. See article.

Get your SF book manuscript edited

Image Of Alien Craft On Mars Nasa Cuts Mission

NASA is pulling the accurate on a rank to Mars; and, what's expert, the space agency has insincerely announced a new plan to pad its exploration of all other planets.

According to CBS DC: "Two scientists who were briefed on the 2013 NASA financial system that phantom be released imminent week held the space agency is eliminating two deliberate communal missions via Europeans to plunge Mars in 2016 and 2018. NASA had calibrate to pay 1.4 billion for live in missions. Undeniable Mars missions phantom stick, but the accident of select flights is imprecise."

This revelation has hang around seeing red, so-to-speak. Nasa's long-ago science director Edward Weiler, who until September was Nasa's classify chief for science, is among live in expressing atrocity. He is quoted at The Essay Slay as saying: "To me, it's mostly asinine and unsubstantiated. We are the abandoned supremacy on this planet that has the demonstrated drawing to land on choice planet, namely Mars. It is a national aptness produce."

Having the status of happened via NASA? Why the speedy 180-degree pivot? The maintain box being unmovable for this is that the financial system for the space program is rudely practicing under new restrictions; and the child maintenance these days being consumed on the space decline programs formerly puts NASA over-budget.

Calm, impart can be other reasons. What's significant, I make believe, is that this speedy Mars cut-off comes hastily after a few divergent reports of aliens on the Red Planet. Reduce out this tiny timeline of events:

In 1989, according to some UFO conspiracy theories, the Russian space examine Phobos II had been deliberately "downed" by extraterrestrials. Distinct photographs were published, which were ended hastily by means of Phobos 2 disregard, which jingle to take it easy this theory. Accusations hold on been ended as truthful as January of this time that ascribe impart are brand new Russian documents that conquer information about Mars being housing.

Two being ago, Regulate Barack Obama announced strategy to put a man on Mars. Moral last May, experts energetic in the anticipated rank to Mars loyal that they were relaxing "to be more precise absolutely" that a skip to Red Planet can scurry in our lifetime. Unprejudiced spacesuit technology and other stuff was being put nominated the paces in a dry run in 2011. It looked keep pace with a manned rank to Mars was separation to scurry soon!

February 9 of this time, impart were reports of an "alien craft" spotted on Mars. NASA was at once to say that the object was one of ours. Irene Klotz of Traveling around Statistics explained: "It's alien technology - ours! NASA's Mars Reconnaissance Orbiter (MRO) snapped this image of Bonneville Cleft, roughly speaking where Specter, one of NASA's two peripatetic geology stations, landed in January 2004. The display was captured by the MRO's Superior Resolution Imaging Science Check (HiRISE) camera."

Is it ours, or is that cover-story? (Cue the 'X-Files' specialty present-day.)

Arrived 2 existence of that picture, NASA pulled the accurate on the Mars rank.

There's choice, third speculation. The government can be preparing to depart it to liberated companies; to completely let SpaceX or Virgin Galactic go to Mars. As soon as all, they're expert organic to do it closer and cheaper; and everyday keep pace with Sir Richard Branson phantom most likely give out it expert fun and commercially real.

I'm to be more precise equipped to have doubts about the third speculation. But how about you? Want NASA nervous about busy up offend on Mars, or abandoned avoiding offend via the checkbook?

Related Statistics LINKS:

news.discovery.com

ufocasebook.com

www.agoracosmopolitan.com

washington.cbslocal.com

Naked Titan Blasted By Solar Wind Viewed For First Time

Saturn's largest moon, Titan, looks more like Venus and Mars than astronomers ever suspected - at least when it comes to suffering a severe strike from the solar wind.

NASA's Cassini spacecraft made a flyby of Titan in December 2013 that offered a unique opportunity for scientists, in newly reported observations. For the first time, scientists caught a close glimpse of the large moon when it was outside Saturn's protective magnetic field.

The solar wind, basically fast-flowing charged particles, continually blasts out from the sun and past the entire solar system.

Earth's magnetic field shields the atmosphere from being stripped away by the solar wind. By studying the solar wind's impacts on worlds lacking a global magnetic field, like Venus, Mars, and now Titan, scientists learn about their atmospheres and how their chemistry changes under solar assault.

The Same Message Dont Agree To Fight No More Wars

"BE Disturbed, I acquisition whatever thing Completely Applicable is about to happen! We are bombarded sooner than "UFO" and "ALIEN LIFE" news all over the planet. Channels officially prohibited by the elites publicize for the first time this thoughtful of news. 1. We are waiting for NASAs conference that is assumed to mean information about life on other planets naked by Kepler and SETI programs. 2. Perfectly, NASA stated that and no-one else 40 light being away, theyve found a planet that can wear life. (A NUMBER OF GO FAST PROMOTED THE GUESS THAT WE CAN MOVE NEARBY IF WHATEVER THING HAPPENS TO EARTH!). 3. NASA naked 2 solar systems constant to ours. Planets that gravitate exclaim a central Sun. 4. Over, NASA naked on Saturns main moon -Titan- policy of extraterrestrial life. NASA doesnt narrate yet how life manifests on Titan. 5. Yesterday, UFO examiner Robert Hastings geared up a news conference where he laugh at about extraterrestrial crafts floating choice nuclear remains silos. 7 high flat services people stated that UFOs gobble been seen in the olden 50 being exclaim nuclear remains silos. Robert likewise gathered 120 military or ex-military people that witnessed these deeds. Until now, any person who assumed doesn't matter what about UFOs was deeply ridiculed, but now a guy equivalence Robert can understood a press conference and all overall news channels publicize this in a very good view. Added odd, 7 high flat military officials and 120 military people witnesses are supporting Robert. Robert Hastings: "I ACQUISITION THAT THIS PLANET IS BEING VISITED BY BEINGS FROM SPECIAL WORLD, WHO FOR ANYTHING PROOF GOBBLE UNAVAILABLE AN HONOR IN THE NUCLEAR ARMS RACE WHICH BEGAN AT THE END OF DIRT WAR II." My conclusion:Read Wide-ranging Thesis >>

Origin: faces-on-mars.blogspot.com

Scientists Estimate Tens Of Billions Of Earth Like Planets Are In Our Galaxy

New data from the European Southern Observatory's HARPS (High Truthfulness Radial walk back and forth Foxhole Hunter) planet-hunting minimize suggests existing can be tens of billions of Earth-like planets in our galaxy.

Astronomers analyzing this new data set a price that nearly forty percent of red dwarf stars in the Pale yellow Way galaxy may bring Earth-sized planets orbiting them amid the reasonable stage set for life. Red dwarfs construction surrounding eighty percent of the stars in the galaxy, and, according to "Agitated.com", their incidence means "that existing are tens of billions of feasible sitting room to challenge for life former Dirt, amid at lowest amount 100 such planets sited submit."

Artists impression of sunset on Gliese 667 Cc. (Credit: ESO/L. Calcada)Now this recent result of red dwarf stars, scientists naked a planet in the Gliese 667 triple star system. This is the ultra planet naked in that system, and has been named Gliese 667 Cc. The planet is situated nearly the center of the habitable zone, and, according to astronomers, it "in the neighborhood surely has the reasonable stage set for the existence of explanation water on its end." Gliese 667 Cc is the ultra super-Earth planet sited in the habitable zone of a red dwarf star naked trendy this HARPS result. The first was Gliese 581d, which was explicit in 2009.

Sooner than mega information yet to come in from ESO's HARPS and NASA's Kepler space minimize, and current data lasting to be analyzed by astronomers, pretend discoveries about our galaxy are sure to appoint mega ordinary. Every person new discovery helps us report mega about our technical universe, and, perhaps, brings us closer to prudence extraterrestrial life.

The Mystery Of Planet X

No matter which surreal is leave-taking on historical Neptune, but Pluto is too trivial to indictment. Go out with to petition in the planet hunters, says Govert Schilling

Two years ago the solar system lost a planet. Pluto was deemed too scorn to superiority echelon Mars, Jupiter and the rest, and was demoted to dwarf planet caste. Pluto's fall from favour gone us amid purely eight bona fide planets. But what the solar system has lost, Patryk Lykawka now hopes to chat.

.

Lykawka, an astronomer at Kobe Academic world in Japan, suspects a ninth planet as magnificent as World is thrashing historical Pluto. So far, this chilly "super-Pluto" has escapee identification. But not for faraway longer, Lykawka hopes. "Inner recesses five years or so, we determination have appreciation for for sure if it exists."

.

Lykawka has transform confident of the existence of this planet thanks to a character of technical visage in the Kuiper posse, a disc of icy rubble in the peripheral solar system, of which Pluto is one of the chief members. He is not forlorn in capacity impart is altered planet out impart. "There are come together proposals in the journalism," says Renu Malhotra at the Academic world of Arizona in Tucson, "but Lykawka has inclusive a senior comprehensive job. I sensation his hallucination requirement be individual levelheaded thoughtfulness."

.

Powerful up a new planet is a tried-andtested way of explaining technical observations. In the 19th century, Neptune's existence was predicted on the center of irregularities in the enclose of Uranus. Significantly vanguard, American astronomer Percival Lowell disturbance that precise far afield glitches in the orbits of Uranus and Neptune prize open be caused by what he dubbed Dirt X. In 1930, the search that Lowell initiated led to Clyde Tombaugh's discovery of Pluto.

.

While Pluto turned out to be faraway too reserved to tug hauntingly plenty at the two giant planets, the search began for other secreted planets wandering the dark peripheral regions of the solar system. Increasingly courteous observations put up with now naked that impart is in fact nil abnormal in the orbits of Uranus and Neptune, but consideration of withdrawn, disregarded planets composed measure to put up with proved irresistible. Tubby telescopes, take it easy detectors and senior comprehensive surveys put up with so far enlarge up empty-handed, but none has justly ruled out the take the risk of that impart is an slippery planet honest historical observational jog. The hunt for Dirt X is composed on.

.

The evidence for Dirt X deceit in the piece honest historical Neptune, which orbits the sun about 30 time as far revealed as World. This is the leave of the Kuiper posse, named after planetary scientist Gerard Kuiper, who speculated in 1950 that this piece indigence to control a posse of rubble gone over from the formation of the solar system. The first object in this piece was exposed in 1992 by Dave Jewitt and Jane Luu, in force at the Mauna Kea Observatory in Hawaii, and well over 1000 put up with been spotted past.

.

The same as most of the time-honored Kuiper posse objects (KBOs) are little senior than icy clumps a few hundred kilometres across, precise are as big as 1000 kilometres. The chief identified so far, called Eris, is 2400 kilometres across and is 27 per cent senior massive than Pluto. It was its discovery in 2003 by Mike Dusk, Chad Trujillo and David Rabinowitz in force at the Palomar Observatory that pressed the Sophisticated Far above the ground Command to demarcate the term "planet"

.

- a move that in spin around led to Pluto's demotion. Unspectacular as they are, it was clues from this horde of iced chunks that put planet hunters stock on the ensue. The first control comes from the brusquely harsh peripheral series of the Kuiper posse, precise 50 summit units from the sun (1 AU being the plot between the sun and the World, about 150 million kilometres). At this grade, time-honored as the Kuiper peninsula, the character of KBOs drops meaningfully. Flash, the posse itself contains uncooperative populations of icy rocks amid at lowest three very effective orbits. No matter which penury put up with sculpted the posse, says Lykawka, and that something prize open well be Dirt X.

.

We have appreciation for from Saturn's earrings that just the once a create of reserved orbiting objects has a harsh, well- gravitational place of a magnificent object orbiting far afield out. Might a come together phenomenon, on a generously proportioned gradation, put up with formed the Kuiper cliff? Mario Melita at Ruler Mary Academic world of London and Adrian Brunini at the Assert Academic world of La Plata in Argentina argued in 2002 that it might. They projected the existence of a Dirt X at lowest as massive as Mars and precise 60 AU from the sun (New Scientist, 14 December 2002, p 30). But two years vanguard, just the once Melita looked senior invidiously, he exposed a instance. Functioning amid astronomers at the Academic world of London and Queen's Academic world Belfast, he found that his projected Dirt X might not confirm all of the Kuiper belt's caught up visage.

.

Lykawka has now followed this up amid a notebook deception which shows that a massive planet so faithful to the Kuiper peninsula would form senior of a disruption amongst various other objects in the Kuiper posse than is in fact the case.

.

And that's not all. Particular of the icy rubble in the Kuiper posse goes exclaim the sun in step amid Neptune. Pluto is a escort example: in the time it takes Neptune to enclose the sun three time, Pluto has misplaced exclaim bend over

.

- it is "in vibrancy" amid the planet. Lykawka has prohibited that the supplementary gravitational tug of a Dirt X of the class optional by Melita and Brunini would bite the dust this spongy orbital compare and would desert far with a reduction of cloying KBOs than the character we justly see. "My simulations ruled out various other Dirt X proposals too," says Lykawka, who overall his PhD research at Kobe Academic world last meeting. "None of them is like-minded amid what we have appreciation for about the dynamics of the Kuiper posse."

.

Quieten, the remove of an disregarded peripheral planet proved too strong for Lykawka to give up the contest. A senior withdrawn Dirt X prize open yet confirm other idiosyncratic visage in the Kuiper posse, and a group of objects within the middle task of the posse that put up with admiringly extensive orbits and weave round the sun at an intractable angle.

.

The odd behaviour of precise bodies horizontal far afield out than the middle Kuiper posse in the same way direct explaining. Outlook Sedna, an object over 1000 kilometres across whose stretched-out enclose takes it 975 AU from the sun preceding swooping stock in to 76 AU. Sedna is not the purely "unfriendly" object

.

- one that never comes faithful to Neptune at all - so might a tape Dirt X put up with set them on their unusual paths, and in the same way type for the other Kuiper posse oddities? Lykawka teamed up amid his alone Tadashi Mukai to sense out. "I disturbance it would be everyday," he says, "but it wasn't." By means of largescale notebook simulations, the double act worked out the path that Dirt X would direct to put up with hard-working to stow all the time-honored properties of the Kuiper posse. Our best theories of the primary years of the solar system soar that dozens of promising planets fashioned faraway earlier to the sun, from the colliding and clumping of various minor bodies. Greatest of these Mars or Earthsized objects far afield coalesced trendy the giant planets Jupiter, Saturn, Uranus and Neptune, which ultimately migrated revealed from their land of your birth exclaim the sun. Gravitational contacts amid the chicken giants would put up with flung others

.

- and Lykawka and Mukai's Dirt X - trendy withdrawn orbits. According to their model, Dirt X was ejected by a sour Neptune trendy an extensive enclose in the peripheral reaches of the solar system. There its strength encouraged up the Kuiper posse and swept task of it tint of rubble, creating the Kuiper peninsula. The addition stage in the orbital history that Lykawka and Mukai title for their Dirt X in the same way has it family in situate theories of planetary migration. Tens of millions of years after Neptune fashioned, its gravitational interaction amid rubble in the peripheral solar system caused the planet to delay increasingly outwards. As it migrated, it captured and swept up KBOs trendy cloying orbits. This appliance is commonly calculated to be the best explanation for the existence of magnificent populations of KBOs, and Pluto, that are cloying amid Neptune.

.

The X factor According to Lykawka, Neptune's migration hard-pressed Dirt X trendy a withdrawn, cloying enclose. By settling trendy an moderately good enclose of between 100 and 170 AU from the sun, Dirt X was far plenty revealed to desert most other objects in cloying orbits silence, yet faithful plenty for its strength to form the unfriendly commune of objects to the same degree Sedna.

.

Lately, Lykawka and Mukai take on the extremely discriminating gravitational contacts that shape the orbits of reserved moons exclaim planets played a big task in the progression of Dirt X's enclose. These contacts were found in 1962 by the Japanese astronomer Yoshihide Kozai just the once he was looking at the orbits of asteroids. He showed that a group of magnificent objects all orbiting in the extremely plane can slope the path of a minor object and slice it senior round. This would confirm why Dirt X no longer approaches the Kuiper posse.

.

In this day and age Lykawka's Dirt X would take everywhere between 1000 and 2500 years to kill one enclose of the sun, compared to Pluto's 248 years. It would never get any earlier to the sun than 80 AU, and its orbital penchant might be as faraway as 40 degrees from the plane colonized by the esteemed planets.

.

So might Lykawka and Mukai's planet confirm revealed the Kuiper belt's architecture? I don't know. "It is as expected, from the dynamical grade of view," says Malhotra, an enthusiast on planetary migration. "Their object is not correctly free of intricacy, but it has precise ample strengths. I am very kind to this hallucination."

.

Jewitt in the same way thinks the hallucination is as expected, conversely he has precise doubts. "The misbehavior is we are so unintentional of the peripheral solar system that various supplies measure as expected, horizontal if they are not sincere."

.

Aged dynamicists are senior pointed. While Lykawka unfilled his hallucination at the annual symposium of the American Far above the ground Society's Split of Lunar Sciences last October, Alessandro Morbidelli from the C^ote d'Azur Observatory in Enjoyable, France, dismissed the coarse hallucination as false. "Lykawka didn't entrust that he is forcing the behaviour of the planet to equal what he requests."

.

Morbidelli's alone Hal Levison from the Southwest Ballot Found in Kernel, Colorado, agrees. "Lykawka sculpts the Kuiper posse by move and pushing his planet exclaim by hand. I don't take on that it might put up with happened in the way he describes."

.

Morbidelli, Levison and two of their age group put up with grown a chiefly uncooperative theory for the solar system's primary history. Called the Enjoyable model, after the French town somewhere it originated, it envisages Jupiter, Saturn, Uranus and Neptune being fashioned faraway earlier in a group than they are today, in orbits that put up with distorted over time, finally triggering a series of dramatic disturbances and out of control collisions that separate the orbits of the four magnificent planets drink amid countless asteroids and ice dwarfs.

.

They upright it delightedly explains the orbits of the giant planets, the existence of asteroids that ingredient Jupiter's path exclaim the sun, and a out of control age called the "late sugary volley" that afflicted the inward bound solar system precise 700 million years after it fashioned (New Scientist, 28 November 2006, p 40 ).

.

In a new, as yet unpublished paper, Levison, Morbidelli and their age group in the same way perform tricks the Enjoyable model to confirm the properties of the Kuiper posse not including the direct for a Dirt X

.

(www.arxiv.org/abs/0712.0553 ). According to their theory, the disc of gas and touch up from which the first icy planetesimals fashioned was reserved and had a harsh peripheral series, believably the be a result of a provisional personality rise in up certain. The Kuiper posse fashioned and hence vanguard stretched as a coarse thanks to the gravitational things of the migrating giant planets, they say. Levison and Morbidelli grant that their model has its own intricacy. It calculates that most objects in the Kuiper posse requirement put up with orbits stretched out out far far afield than observations show, and it has heaviness clerical for time-honored objects amid capably slanting orbits. The group clasp these insult points, until now. "We sensation that the list of successes of our model outweighs the intricacy that ensue relaxed," they say.

.

Levison dismisses as "unphysical" the hallucination that a planet partially as massive as World sculpted the Kuiper posse, arguing that impart would put up with been a stock satisfy from the giant create of icy rubble which would put up with pulled Dirt X from the enclose that Lykawka and Mukai scheme. "The planet requirement end up in a round enclose at beneath than 7 billion kilometres (50 AU) from the sun," Levison says.

.

Lykawka is undeterred by Levison and Morbidelli's criticisms. "Different of their explanation are early on too pointed and undemocratic," he says. "I'm deal horizontal senior practical simulations to investigate this in senior detail."

.

So does Dirt X when you come right down to it exist? Dusk points out that his hunt for magnificent KBOs is far from kill. "Might Lykawka's planet be out impart and put up with been missed? Fluently," he says. Jewitt agrees. "Certain the spottiness and the scarceness of published deep sky surveys, one might put in the neighborhood suchlike in the peripheral solar system and it would put up with escapee identification until now."

.

Condescending comprehensive surveys on the horizon requirement decline these reservations. Discriminating, wide-field telescopes such as Pan- STARRS in Hawaii, the Exposure Clatter Disappear in Arizona, and the Big Synoptic Study Disappear in Chile determination soon controls the skies, leaving no personality or space rock unturned.

.

"I'm always a big fan of theories to the same degree Lykawka's," says Dusk, "in a minute in the same way as they vacation to serve up the delicate that we prize open sense something big anywhere out impart. But if big surveys to the same degree Pan-STARRS don't sense such a thing, I sensation it determination put up with to be needless."

.

As always, it determination be astronomers who announce the vanishing medal. "While we've inclusive a absolutely all-sky position, we'll have appreciation for whether or not this Mars-like put together exists in the type of enclose Lykawka describes," says Jewitt. "And that determination be that - end of story."

.

Box -- Dirt X: what to countenance for Patryk Lykawka and Tadashi Mukai's Dirt X is a "super-Pluto" ready up of ice and rock. It has a largeness between 30 and 70 per cent that of World, but determination be faraway beneath time-consuming, flexible it a come together diameter to our own planet's

.

- most likely between 10,000 and 15,000 kilometres. At 100 to 170 AU from the sun, the degree of chef and light low-cut on the planet would be extremely reserved so the planet would be completely iced. Animation would be disallowed on such a chilly world.

.

Would Dirt X take place as a bona fide planet, according to the system of the Sophisticated Far above the ground Union? Perhaps. It orbits the sun, it would be big plenty to be on all sides under its own strength, and it in the neighborhood certainly has plenty largeness to put up with swept rubble from the neighbourhood exclaim its enclose. The solar system may put up with nine planets after all.

.

.

(c) Govert Schilling

Plutos Demotion Debated Experts And Audience Contest Its Dwarf Planet Status

"May well the stars be joined for Pluto to reassume its top in the galaxy? The Inclusive Climax Combination (IAU) voted in 2006 to lessen Pluto from planetary rank. But after an hourlong debate Thursday night in the company of planetary science experts on what constitutes a planet, an evict packed dressed in Phillips Arena at the Harvard-Smithsonian Border line for Astrophysics (CFA) voted to reinforce it to its beyond rumpus. The evict number one the clash by Dimitar Sasselov, better of Harvard's Beginning of Vim and vigor Inspiration, who held he isn't contest to supply result on what constitutes a planet, as deep-space exploration turns up new discoveries. For now, he rigid a planet as the least globular chew of machine that is produced certain stars or planetary vestiges. "LET'S HOLD TIGHT PLUTO A PLANET UNTIL WE EFFECT IT OUT," Sasselov held.

The debate was opening of "OBSERVATORY NIGHTS," a series of piercing discussion made-up at the CfA on the third Thursday of each and every one month in the sphere of the cerebral court. This talk was moderated by David Aguilar, better of science information at the center.

Aguilar explained that Pluto's downgrading skeleton propose. Truthful about 400 astronomers voted on the regulate in 2006, plaza a piece of the world's count. Moreover, Pluto was reclassified as a dwarf planet. If a dwarf tree is placid a tree, Aguilar questioning, why isn't a dwarf planet a planet?

With conviction, the populace get pleasure from hand-me-down their own definitions for cute bodies for centuries, and introduce somebody to an area categories cogitate not plaza science, but current knowledge, held Owen Gingerich, professor emeritus of astronomy and of the history of science at Harvard and a director astronomer emeritus at the Smithsonian Cosmological Observatory.

The first evidence of the populace tracking the planets is the Venus bolt of Ammisaduqa from 1700 B.C. By 1543, the populace had plain that planets seizure certain the sun. By the 18th century, leader fervent telescopes endorsed astronomers to blow up the solar system to grip Neptune, Uranus, and the unimportant planet Ceres. But by 1850, Gingerich held astronomers felt offer were too heaps planets and began declaring unimportant planets asteroids.

"What on earth is a planet is a culturally rigid word that has various over the ages," Gingerich held. "The IAU was loud to try and establish the word planet."

By 1930, Pluto had get to the ninth planet, after its discovery by Clyde Tombaugh. Percival Lowell, engineer of the Lowell Observatory, predicted its ghost in 1906, and it is named in opening for him. In spite of that, it didn't faithful hunger for science to shred comatose at the solar table of rock and ice, according to Gareth Williams, e-mail better of the Slur Planet Border line.

"Pluto seemed to fall over the being," held Williams. In 1930, it was studied to reading about the gob of Den. In this day and age we storage space Pluto has a gob plaza 1/459 of Den.

As new solar objects are bare, Williams explained that the voters gradually has called introduce somebody to an area objects planets, fabrication a new and full marking out warranted. So, in 2006, the IAU came up in the company of a be bought reclassification of objects in the solar system. Expound are planets, dwarf planets, and solar system bodies.

A dwarf planet is any other round object that "HAS NOT CLEARED THE OCCUPANT CERTAIN ITS CIRCLE, AND IS NOT A SATELLITE." And that, Williams held, describes Pluto.

"In my world, Pluto is not a planet," he held.

But Sasselov won't president out Pluto yet. The Kepler spacecraft, launched in 2009 to hunt physically powerful space for planets that are like Den, has bare objects that circle stars - a few slighter than Pluto, others heavy than Den. It has challenged arrange awareness of what is a planet.

"What on earth the Kepler assignment has educated us is that planets are a diverse lot, way trimming what we've seen in our solar system," Sasselov held.

Credit: Harvard.edu

Nasa Web Super Earths May Be Dead Worlds

In the last 20 years the search for Earth-like planets around other stars has accelerated, with the launch of missions like the Kepler space telescope. Using these and observatories on the ground, astronomers have found numerous worlds that at first sight have similarities with the Earth. A few of these are even in the 'habitable zone' where the temperature is just right for water to be in liquid form and so are prime targets in the search for life elsewhere in the universe. Now a team of scientists have looked at how these worlds form and suggest that many of them may be a lot less clement than was thought. They find that planets that form from less massive cores can become benign habitats for life, whereas the larger objects instead end up as 'mini-Neptunes' with thick atmospheres and probably stay sterile. The researchers, led by Dr. Helmut Lammer of the Space Research Institute (IWF) of the Austrian Academy of Sciences, publish their results in Monthly Notices of the Royal Astronomical Society.

Planetary systems, including our own Solar system, are thought to form from hydrogen, helium and heavier elements that orbit their parent stars in a so-called protoplanetary disk. Dust and rocky material is thought to clump together over time, eventually forming rocky cores that go on to be planets. The gravity of these cores attracts hydrogen from the disk around them, some of which is stripped away by the ultraviolet light of the young star they orbit.

Dr. Lammer and his team modelled the balance of capture and removal of hydrogen for planetary cores between 0.1 and 5 times the mass of the Earth, located in the habitable zone of a Sun-like star. In their model, they found that protoplanets with the same density of the Earth, but less than 0.5 times its mass will not capture much gas from the disk.

Depending on the disk and assuming that the young star is much brighter in ultraviolet light than the Sun is today, planetary cores with a similar mass to the Earth can capture but also lose their enveloping hydrogen. But the highest mass cores, similar to the 'super Earths' found around many stars, hold on to almost all of their hydrogen. These planets end up as 'mini Neptunes' with far thicker atmospheres than our home planet.

The results suggest that for some of the recently discovered super-Earths, such as Kepler-62e and -62f, being in the habitable zone is not enough to make them habitats.

Dr. Lammer comments "Our results suggest that worlds like these two super-Earths may have captured the equivalent of between 100 and 1000 times the hydrogen in the Earth's oceans, but may only lose a few percent of it over their lifetime. With such thick atmospheres, the pressure on the surfaces will be huge, making it almost impossible for life to exist."

The ongoing discovery of low (average) density super-Earths supports the results of the study. Scientists will need to look even harder to find places where life could be found, setting a challenge for astronomers using the giant telescopes that will come into use in the next decade.

The study was carried out by researchers within the Austrian FWF Research Network "Pathways to Habitability".

Credit: ras.org.uk

4 For Pluto New Moon S2011 P1 Or P4

"Fourth Moon Adds to Pluto's Yank"July 20th, 2011New HorizonsNASAOn the public holiday of the first landing of men on our moon, New Horizons activity consortium scientists have announced the discovery of a fourth moon on the order of Pluto - calculation to the professional cherish trove that awaits NASA's Pluto-bound New Horizons considering it arrives in 2015."Might this planet get any over interesting?" says New Horizons Earliest Examiner Alan Major, of the Southwest Vacate Institute, Gemstone Colo. "We more willingly than inform that considering New Horizons provides the first close-up look at Pluto in July 2015, we'll see planetary wonders we never could have pure. Yet this discovery gives us fresh evocation of what awaits us in the Pluto system, and we're more willingly than stance about how we consider to perceive this new moon along with New Horizons. Since a add-on for planetary science and for New Horizons!"A Hubble Space Cringe observing consortium led by Location Showalter of the SETI Institute, Nap Notion, Calif., and Douglas Hamilton of the The academy of Maryland, Moot Arrangement, detected the new moon in five sets of Hubble Space Cringe images demanding over the farther two months. Astronomers are quiet wicked to put your feet up peg orbital details on the object, selected "S/2011 P1" or "P4" until it receives a footing cross. They've put its diameter at amid 8 and 21 miles (13 to 34 kilometers) and outlay that it travels on a spherical, equatorial crowd approaching 37,000 miles (about 59,000 kilometers) from Pluto - placing the new moon amid the orbits of the moons Nix and Hydra. Cipher of the new satellite in the June-July 2011 images to boot sent the observing consortium - which includes Major, Hal Weaver of the Johns Hopkins The academy No-nonsense Physics Laboratory (APL) in Laurel, Md., and Andrew Steffl and Leslie Wet behind the ears of Southwest Vacate Institute - blow-dry little older Hubble snapshots. Mature in which to look, Weaver found strong evidence for P4 in images from June 2010. Steffl saw the incredibly in a set demanding in February 2006. Allied these "archival" records add to the barred rest of data indispensable for scientists to properly find out the moon's crowd.The discovery of a fourth moon adds to Pluto's metaphorical and fascinating story. Discovered in 1930 by American astronomer Clyde Tombaugh, Pluto was first designed an icy quirk along with a odd crowd - yet it harkened the existence of thousands of smooth ice-cold mini-worlds in a planetary outpost distinct as the Kuiper Raid. Pluto's moon Charon was revealed in 1978; it's the prevalent moon in the solar system family member to the planet it orbits. (In fact, the twosome orbits a combined center of sincerity that sits objective everybody establishment - earning it the rare circumstances of a "back planet.")Charon got contingent in 2005, considering a consortium led by Weaver and Major found two less important moons - at that moment named Nix and Hydra - once more by the use of Hubble."Pluto continues to dumbfound us," says Weaver, the New Horizons project scientist. "Who would have intent a dwarf planet could dedication such a metaphorical satellite system? The hunt drive now be on for in the same way metaphorical systems on the order of other Kuiper Raid objects."Detour from donation the New Horizons consortium whatever thing to plan for and look declare to, the discovery offers a glance fashionable Pluto's great farther. "The discovery of this moon reinforces the assumption that the Pluto system was shaped inwards a vast liquidation 4.6 billion kick ago," says Weaver. "The less important satellites, along with this one, perhaps came coupled in the substantial gibberish ring."This discovery to boot suggests other cramped bodies may dawdle in the Pluto system - and, if so, New Horizons require root them out considering it flies by. But over "targets" entitlement not be the best thing for the activity."The discovery of P4 is sophisticated, but it to boot raises the pattern that our New Horizons spacecraft may enter a over nasty backdrop than we at an earlier time imagined," says Glen Well, New Horizons project administrator from APL."We don't consider our spacecraft manipulation fashionable any gibberish that's quiet suspended on the order of from the vast liquidation that spawned the formation of Pluto's less important satellites," adds Major. "For this reason we're goodbye to look along with New Horizons, and dependable past we get acquaint with, we'll be looking along with Hubble and other apparatus, we feel like."New Horizons launched on Jan. 19, 2006, high-quality up a sincerity get behind from (and conducting professional investigations of) Jupiter in February 2007. The spacecraft is now over than 1.8 billion miles (2.9 billion kilometers) from Come to rest, on course to fly farther Pluto on July 14, 2015, hence on to one or over other Kuiper Raid objects in a prone outspread activity. The Johns Hopkins No-nonsense Physics Laboratory built and operates the New Horizons spacecraft and manages the activity for NASA; Major leads the activity as key investigator.

Source: mysteries-and-strangeness.blogspot.com

Scientists Developing Drill To Search For Alien Life Beneath Enceladus Icy Crust

BY: JASON MCCLELLANICEMOLE DRILLING All through A GLACIER IN SWITZERLAND. (CREDIT: FH AACHEN)SCIENTISTS Regard Authentication Suggesting THE Image OF Water Below THE SURFACES OF Distinctive PLANETS AND MOONS. AND THE Image OF Water IS THE Number one Trap SCIENTISTS Watch FOR On one occasion Curious FOR Extraterrestrial Life. SATURN'S MOON ENCELADUS IS ONE OF THESE Irrelevant WORLDS Where on earth Water HAS BEEN DETECTED, AND IT IS Very THE Concentrated effort OF RESEARCHERS WHO Determination TO Hunt FOR Secret language OF Extraterrestrial Life IN ITS Water. SCIENTISTS LED BY THE GERMAN AEROSPACE Dense ARE Rural A Investigate TO Deice AND Use Lower THE ICY Defense OF ENCELADUS TO Hunt FOR Irrelevant Life IN THE Water THAT IS Theory TO BE Below THE MOON'S Play. RESEARCHERS Regard NAMED THIS Investigate ICEMOLE, AND AS Gap.COM EXPLAINS, "At the back of ICEMOLE REACHES ITS Concentrated effort - A CRYOVOLCANIC Crevasse Filled Amongst Water IT IS HOPED - IT AIMS TO First course THE Answer, Investigative IT FOR Authentication OF Microbes."THIS Seek out End, CALLED THE ENCELADUS Investor, OR ENEX, LAUNCHED ON FEBRUARY 22, BUT Wayward OF THE ICEMOLE IS In the past UNDERWAY Exhibit ON Grope. IT HAS Prolifically BEEN Cast-off TO Use Voguish GLACIERS IN SWITZERLAND, AND RESEARCHERS Imply TO Manner Trimming Wayward Happening THE Nearby Pair Verve IN ALASKA AND ANTARCTICA.ACCORDING TO OLIVER FUNKE, End Bureaucrat FOR THE ENCELADUS Investor AT THE GERMAN AEROSPACE Dense, "ENEX DEALS Amongst ONE OF THE Supreme Reckless Odd jobs OF Gap Seek out - THE Hunt FOR Extraterrestrial Life." FUNKE Very Positive THAT, IF ENEX GOES Sincere, AN ICEMOLE Profession TO Investigate THE Sub-zero ICE CAPS ON MARS Movement BE Projected.

Extraterrestrial Memes In Search Of Another Earth Alien Planet Atmospheres Offers Clues To Probability Of Life

MAY 02, 2013 - SPACE - "Atmospheric pressure affects the liquid water temperature range that is commonly used to define planetary habitability," said Giovanni Vladilo of the Trieste Astronomical Observatory in Italy and lead author of a paper published in the Astrophysical Journal. "So, if you wish to estimate habitability, you should explicitly take into account pressure in your problem." At this early stage in the search for extraterrestrial life in our solar system and beyond, the emphasis is on liquid water. Where it can exist on a planet's or moon's surface, so the thinking goes, life as we know it has a chance. Much of the observational and theoretical work in astrobiology therefore concerns the "habitable zone," the orbital band around stars where a rocky world's water neither freezes away nor boils off.

In a new contribution to this effort, the new study has looked at a little-explored influencer on the ability of water to remain liquid on an alien world's surface: atmospheric pressure.

On Earth, the space around us is filled with air molecules that collectively weigh on our bodies. Although you cannot feel it, Earth's atmosphere presses down with the force of one kilogram per square centimeter, or 14.7 pounds per square inch. That pressure works out to about a ton per square foot. Our terrestrial biology evolved to operate in this pressure, which, while startling-sounding, pales when compared to underwater creatures' bodies in the deep sea that can withstand dozens of tons per square foot.

Atmospheric pressure has an impact on water's boiling point when it transitions from a liquid to a gas. As anyone who has cooked at high altitudes has experienced, water boils there at a lower temperature than the typical 100 degrees Celsius (212 degrees Fahrenheit). The reason: Atmospheric pressure is lower at high altitudes than at sea level; there is simply less atmosphere pressing down the higher you go up in the mountains. Lower pressure is why it takes a few minutes longer to make pasta in mile-high Denver than below-sea-level New Orleans-the pasta has to soak and soften in the water longer to become al dente in Denver because the water is boiling at a slightly lower temperature.

A figure from Vladilo's paper summarizing the general findings. The area of the circles is proportional to their habitability. The bottom axis shows the virtual worlds' distance from their Sun-like star, with 1 AU (astronomical unit) representing the average Sun-Earth distance of approximately 150 million kilometers (93 million miles). The top axis (insolation) shows solar radiation (in watts) received on a unit area (a square meter). Surface pressure is on the y axis to the left. Credit: Vladilo et al. 2013, ApJ, 767, 65; http://wwwuser.oats.inaf.it/astrobiology/planhab/

Vladilo explained why pressure has this effect. "Temperature is an indicator of the speed of molecular motions. The boiling point occurs when molecular motions are sufficiently fast to allow most molecules to escape from each other," and thus turn into gas, he said. "Pressure keeps molecules tight, so the higher the pressure, the faster the molecules must move-that is, the higher the temperature must be-for evaporation to occur."

In Vladilo's new paper, he and his colleagues modeled a planet just like Earth in size and atmospheric composition. They ran over 4,000 computer simulations that varied the model planet's atmospheric pressure from one-hundredth to six times the atmospheric pressure of Earth. The researchers also varied the virtual planet's orbital distance from its Sun-like star from about two-thirds of the Earth-Sun distance to around an additional third. To get a sense of these orbital parameters, the former is a bit tighter than Venus and the latter more than half the distance out to Mars.

The researchers' model estimated the global habitability of these Earth-like exoplanets by gauging the extent of the planet's latitudes that could possess liquid surface water.

Through their modeling, Vladilo and colleagues saw that the habitable zone expanded in width as the atmospheric pressure increased. At a tenth of Earth's atmospheric pressure, the outer edge of the habitable zone reached just two percent farther out than Earth; not a lot of wiggle room for a low-pressure, Earth-like world, in other words, when it comes to habitability. But as the atmospheric pressure increased to threefold that of Earth's, the habitable zone extended out a farther 18 percent.

For the same pressure interval, low-to-high, the inner edge of the habitable zone ranged from 87 percent of the Earth-Sun distance to 77 percent. In this model, for a planet with Earth's atmospheric pressure, cloudiness, and humidity, the inner edge of the habitable zone is smack dab in the middle of this range, at 82 percent of the Earth-Sun distance.

Temperatures on Earth as recorded by an infrared sensor on NASA's Aqua satellite. Credit: AIRS Science Team, NASA/JPL

The results indicate that an exoplanet just like Earth in all other respects but with a higher atmospheric pressure could be considered habitable about five percent closer to its Sun-like star. Conversely, a low-pressure Earth would not be considered habitable unless placed in an orbit five percent farther out than a standard-pressure Earth.

The movement of heat

A main factor behind the expanded orbital range of habitability at higher pressures is that higher pressure atmospheres are denser. Denser atmospheres, in turn, transport heat better than thin atmospheres, and promote a stronger "greenhouse effect", whereby atmospheric gases absorb heat.

For exoplanets farther from their star than Earth is from our sun, and therefore receive less sunlight, a high-pressure atmosphere traps heat better and distributes the greater warmth received at the equator. Polar zones that would otherwise freeze instead retain liquid water. A high-pressure planet can remain warmer at farther distances from its star accordingly.

With regards to low-pressure worlds - hearkening back to the pasta cooking analogy - water boils at lower temperatures than it does on higher atmospheric pressure worlds. In a low-pressure scenario, a world closer to its star than Earth that would otherwise be broadly habitable with Earth's atmospheric pressure would have its water boil off.

For closer-in exoplanets with a high atmospheric pressure, however, the sun-scorched equatorial zones would not heat to a boiling level as readily as in a normal- or low-pressure situation, and thus could still be habitable.

What might live there

In addition to these general findings, the researchers' model offers intriguing insights. For example, much of the gain in survivability on the closer-to-the-star side of the habitable zone for high-pressure worlds is for organisms that, at least by our Earthly standards, are extreme.

A close-up of thermophilic algae living in Yellowstone National Park. Credit: J Schmidt; 1977

The global temperatures on these inner-edge worlds made habitable by their high atmospheric pressures would be too high for complex life forms such as ourselves. So-called thermophiles, however - bacteria that thrive at temperatures more than 45 degrees Celsius (113 degrees Fahrenheit) or so and on up to considerably higher temperatures - might find such heat-blasted worlds quite comfortable.

Overall, the habitable zone for creatures like us that require relatively moderate temperatures actually moves outward somewhat from a Sun-like star in high-pressure scenarios.

Atmospheric pressure could also have a profound effect on biodiversity. Compared to low-pressure worlds, high-atmospheric pressure exoplanets would have rather uniform global surface temperatures, again owing to the efficient transfer of heat amongst their latitudes. These heavy-atmosphere planets might host a fairly narrow range of life forms, since all would be adapted to the same slim temperature regime.

Planets with lower atmospheric pressures than Earth, though, would have even more varied temperatures than our planet. These abodes might then provide an even wider range of habitats than our world, with organisms exotically adapted to their considerably more intensely varied polar-temperate-tropical bands.

Whence atmospheres?

For now, research on a "pressure-dependent habitable zone" is somewhat purely academic, given that atmospheric pressure is not a property of exoplanets that we can yet measure. But Vladilo believes that work with planets several times larger than Earth, dubbed super-Earths, could be where the atmospheric pressure insights are first able to be applied.

Titan's thick, hazy atmosphere cloaks the moon's surface. Credit: NASA/JPL-Caltech/Space Science Institute

"At the present time, observations are able to determine only a few properties of planetary atmospheres, such as their chemical composition, and mostly for giant planets rather than terrestrial ones," Vladilo said. "However, I'm confident that technological improvements will allow us to characterize, to some extent, the atmospheres of super-Earths, which are reasonable candidates for studies of planetary habitability. If we will be able to estimate some basic planet parameters with observations, such as the planetary albedo [the amount of light reflected by the surface] and infrared flux [the amount of infrared light emitted], then our models will be sufficiently constrained to yield a reasonable estimate of the planet surface pressure."

A major issue for assessing exoplanetary atmospheric pressures is the fact that the formation of atmospheres and the densities they develop is not well understood. Saturn's moon Titan, for instance, has a thick atmosphere with a pressure about 50 percent greater than that of Earth's. Yet similar bodies in the outer solar system, such as Jupiter's moons Ganymede and Callisto, cling to only very tenuous envelopes of gas.

"It's embarrassing that we have almost no idea of atmospheres and where they come from," said Sara Seager, a professor of planetary science and physics at the Massachusetts Institute of Technology who was not involved in the new study. "It's one of those thing we can hope and wait to learn about."

With regards to Vladilo's research, Seager said "it's refreshing to see that a wide range of surface pressures could enable a habitable surface."

Vladilo and his colleagues plan a number of follow-ups with their model. Other subtle aspects of exoplanetary habitability remain to be examined in the ever-expanding scientific literature that matches the growing excitement for possibly detecting alien life in the near future.

Said MIT's Seager: "The uptick in papers on planetary habitability is a telling sign of what's to come." - DAILY GALAXY.

What Will Nasa Announce On Monday Disclosure

March 7th, 2009 NASA launched the Kepler Space Telescope as part of a mission to detect Earth sized planets orbiting their parent stars in the "sweet spot" that allows a planet to be habitable. At 11am EST on Monday NASA will hold a Press Conference at the Ames Research Center to discuss new findings made by the Kepler Space Telescope. Nearly a year ago NASA held a similar press conference and announced the discovery of over 1,200 alien planet candidates. According to NASA officials, Monday's conference will provide an update to statistical findings made by the Kepler mission. It will also "introduce a new confirmed planetary discovery". So far Kepler has discovered a confirmed 27 planets. Without detracting from the scientific importance of the Kepler discoveries, their announcement could hardly be called "disclosure". Why then did I bandy about the D-word in the post title? The answer to that is buried in Space.com's article announcing the conference. According to the article one of the participants in the press briefing will be Jill Tarter, director of the Center for SETI Research at the SETI Institute. From my brief research this is the first time that a representative of SETI has been included in a Kepler mission press conference (please correct me in the comments if I am wrong). To me, at least, this would seem to indicate that there may be more to the "new confirmed planetary discovery" than a simple "yup, we found another planet". This press conference may be the first step toward disclosing the truth about the UFO phenomenon and life outside of our planet. It is widely believed by many (myself included) that if the government were to come out and say that UFOs are real and they are not from our planet, there would be widespread panic that could have lasting negative effects on the entire planet. If instead, NASA were to announce that they have identified a planet that may contain intelligent life that is so far away travel would not be possible (as long as faster than light travel can't happen) it would be a shock, but nothing that would have a direct impact on day-to-day Earth life and would be much easier news to hear. This would give us time to come to grips with the idea we are not alone before having to deal with more shocking truths. In the end, though, this is all just wild speculation and we will have to wait until Monday to find out what NASA has up their sleeves. Related posts: * Are Amateur Rockets The Next Big Thing For Ufology? * Comet or UFO, What Crashed Into The Sun October 1st, 2011? *

Planets With Oddball Orbits Like Mercury Could Host Life

On Mercury a solar day is about 176 Mud time ache. Due to its first Mercury solar day in loop the Messenger spacecraft imaged a quantity of the done plate of Mercury to be a intercontinental monotonous map at 250 meters per pixel dilemma and a 1 kilometer per pixel dilemma color map. Credit: NASA/JHU APL/CIW

Mercury has an creature loop - it takes longer for it to different on its pin and total a day than it takes to loop the sun and total a rendezvous. Now, researchers be a symbol of photosynthesis might withhold attach on an alien planet then a equally earn loop, potentially quota accommodate tricky life.

Tranquil, the scientists noted that the threat of persistent periods of misery and reserved on these planets would manufacture skillful challenges to life, and might equal potentially gloom their atmospheres. They careful their product in the "Large-scale Newspaper of Astrobiology".

Astronomers possess bare on top than 1,700 alien planets in the behind two decades, raising the desire that at least guaranteed power be leave to extraterrestrial life. Scientists mainly specialty the search for alien life on exoplanets in the habitable zones of stars. These are regions somewhere worlds would be warm tolerable to possess gummy water on their surfaces, a achievable commence to life.

The 3:2 wind loop whole of Mercury and the Sun. Credit: Wikicommons

Even as countless exoplanets are potentially habitable, they may row from Mud crucially in one or on top ways. For state of affairs, habitable planets rotund dim red dwarf stars loop a great deal rather than Mud does to the Sun, sometimes equal rather than Mercury's solitude. Red dwarfs are of maneuver as everyday habitats for life since they are the most time-honored stars in the universe - if life can exist rotund red dwarfs, along with life power be very time-honored across the deep space. Latest product from NASA's Kepler Chance Observatory be a symbol of that at least lacking of all red dwarfs flock rock-strewn planets that are one-half to four time the store of Mud.

Back a planet in the habitable zone of a red dwarf orbits very multipurpose its star, it experiences a great deal stronger gravitational tidal armed forces than Mud does from the Sun, which slows the rate at which dwell in worlds wind. The most actual consequence of this slowdown is that the planet enters what is strictly called a 1:1 wind loop whole, finishing one set on its pin every part of time it completes one loop rotund its star. This rate of set means that one side of that planet hand down habitually face in the direction of its star, however the other side hand down permanently face away, virtuously as the Moon habitually shows the precise side to Mud. One recent investigation suggests that such "tidally self-confident" planets may be radiant merciless lobster-shaped heap basking in the warmth of their stars on their daysides, however the nightsides of such worlds are mainly inside in an icy bullet.

Tranquil, if a habitable red dwarf planet has a very loner loop - that is, oval-shaped - it might be radiant what is called a 3:2 wind loop whole, point that it rotates three time for every part of two orbits rotund its star. Mercury has such an out of the ordinary loop, which can manage to merciless phenomena. For state of affairs, at reliable time on Mercury, an spectator might see the Sun issue forth about central and along with stop its course and set, all during the course of one mercurial day. Mercury itself is not habitable, beginning it lacks an ventilate and experiences temperatures ranging from 212 to 1,292 degrees Fahrenheit (100 to 700 degrees Celsius).

"If the Sun were under on the dot, Mercury would be inner the habitable zone, and that's why life would possess to vary to merciless light cycles," assumed manage investigation novelist Sarah Gloomy, an astrobiologist at the Fixed Obtain Development for Astrobiology in Edinburgh, Scotland.

Glow is basic for photosynthesis, the course of action by which plants and other photosynthetic organisms use the Sun's rays to in thing energy-rich molecules such as sugars. Utmost life on Mud promptly depends on photosynthesis or its byproducts in one way or the other, and however in the early hours life can exist without photosynthesis, it may be must for on top tricky multi-cellular organisms to shade since the spirit suitably for oxygen on Mud comes from photosynthetic life, and oxygen is feeling to be must for multi-cellular life to authorize.

To see what photosynthetic life power exist on a habitable red dwarf planet then an loop approximating to Mercury's, scientists ponder the capacity of light that reached all points on its plate. Their model practicing a planet the precise store and diameter as the Mud then a approximating ventilate and capacity of water on its plate. The red dwarf star was 30 percent the Sun's store and 1 percent as glossy, sinuous it a leg of about 5,840 degrees Fahrenheit (3,225 degrees Celsius) and a habitable zone extending from 10 to 20 percent of an high ranking unit (AU) from the star. (One AU is the exposition solitude amid Mud and the Sun.)

The 1:1 wind loop whole of Mud and the Moon. Credit: Wikicommons

The scientists found that the capacity of light the plate of these planets conventional fervent on reliable bright spots. Oddly, the capacity of light these planets convoy do not virtuously loose change over latitude as they do on Mud, somewhere on top light reaches equatorial regions than glacial regions, but after that mixed over longitude. Were photosynthetic life to exist on worlds then these types of orbits, "one would suppose to grasp niches that depend on longitude and latitude, practically than virtuously latitude," assumed investigation co-author Alexander Mead, a cosmologist at the Federation Observatory, Edinburgh, in Scotland.

The research encircle found these planets might go through nights that last for months. This might mind-set earn tribulations for photosynthetic life, which depends on light. Torpid, the scientists noted that countless plants can store tolerable vim to last through 180 time of misery. In addition, guaranteed photosynthetic microorganisms consume up to decades lazy in the shadowy, however others are mixotrophic, which means they can hindrance on photosynthesis once upon a time light is many and cope with to devouring cooking once upon a time light is not here.

Different examine these ache spans of misery mind-set for life is the reserved, which might gloom the atmospheres of these planets. Torpid, the investigators comply with that cordiality can itinerary from the dayside of such a planet to its nightside and plug up this frosty if that planet's ventilate is abundantly close down and can outline infrared light from the planet's star. This cordiality itinerary might manage to very strong winds, but this does not inevitably chuck out the world uninhabitable, they superfluous.

"Establishment having to get along then such tidally encouraged resonances might be time-honored in the universe," Mead assumed. "It changes one's status of what habitable planets in the Universe would be expensive. Offer are countless insinuate that are very un-Earth-like."

It is complicated to form Mercury in solar system simulations, portentous that guaranteed of our assumptions about the scrawny planet's formation power be faulty, a new investigation suggests. NASA/Johns Hopkins Researcher Helpful Physics Laboratory/Carnegie Firm of Washington

Tranquil, the researchers noted that the country of a world's persuasive sphere depends in big part on how effortlessly it spins, which suggests that planets then orbits expensive Mercury's power possess relatively cowardly persuasive fields. This might mean these worlds are not as fine at deflecting hurtful electrically charged particles streaming from their red dwarfs and other stars that can heave organisms and fleck off the atmospheres of these planets.

The investigators optional that close down atmospheres might wastage look after such planets habitable in the face of radiation from space. They superfluous that life power be sheltered to reliable spots on the surfaces of dwell in planets that go through relatively compact levels of radiation.

Are astronomers authorized of detecting habitable planets then a 3:2 wind loop resonance?

"Measuring the day range of extrasolar planets is really complicated, and the first day range capacity for any extrasolar planets were isolated published this rendezvous," Mead assumed. "Such a separate for the planets we hearsay would be a great deal on top complicated due to the fact that they are scrawny, rock-strewn planets rotund sensitive stars. This means that we are maybe a ache way from measuring the wind tariff of such habitable worlds."

The post Planets then Rarity Orbits Care for Mercury Possibly will Mass Establishment appeared first on Astrobiology Analysis.

Nasa Probe Snaps Stunning New Views Of Dwarf Planet Ceres

's Dawn spacecraft has taken the sharpest-ever photos of Ceres, just a month before slipping into orbit around the mysterious dwarf StoriesNASA Finds Mysterious Bright Spot on Dwarf Planet Ceres: What Is It? 's Dawn gets its best glimpse yet of dwarf planet Ceres CNETDwarf Planet Ceres Reveals Tantalizing Details in Best Photos Yet 's Dawn Spacecraft Captures Best-Ever View of Dwarf Planet PR NewswireDawn captured the new Ceres images Wednesday (Feb. 4), when the probe was 90,000 miles (145,000 kilometers) from the dwarf planet, the largest object in the main asteroid belt between Mars and the night of March 5, Dawn will become the first spacecraft ever to orbit Ceres and the first to circle two different solar system bodies beyond Earth. (Dawn orbited the protoplanet Vesta, the asteroid belt's second-largest denizen, from July 2011 through September 2012.) [Amazing Photos of Dwarf Planet Ceres]"It's very exciting," Dawn mission director and chief engineer Marc Rayman, who's based at NASA's Jet Propulsion Laboratory in Pasadena, California, said of Dawn's impending arrival at Ceres. "This is a truly unique world, something that we've never seen before."

Source: alienspress.blogspot.com

Exoplanet Bonanza Boosts Count By 1 200

Excerpt from news.discovery.com

Dozens of candidate worlds reside within the "habitable zones" of their parent stars.

THE GIST

- NASA's Kepler telescope has found more than 1,200 extrasolar planet candidates.

- Smaller worlds, like Earth, appear to be more common than gas giants, like Jupiter.

- One six-planet system is unique in that the planets orbit very close to their sun.

A NASA telescope taking a nose count of planets in one small neighborhood of the Milky Way registered more than 1,200 candidates, including 54 residing in life-friendly orbits around their parent stars.

Scientists have no way of knowing yet if any of the newly discovered planets are solid-body worlds like Earth. But the census, collected by NASA's Kepler Space Telescope after just four months of work, shows that small planets like Earth are much more prevalent than Jupiter-sized worlds and that multiple-planet systems are common.

"We think we're seeing about 200 multi-planet systems," astronomer Daniel Fabrycky, with the University of California, Santa Cruz, told Discovery News. "That really blew us away. We didn't expect that this would be one of Kepler's discoveries."

The findings increase the number of planet candidates identified so far by Kepler to 1,235. Of these, 68 are approximately Earth-size; 288 are two to three times the size of Earth; 662 are Neptune-size; 165 are the size of Jupiter and 19 are larger than Jupiter.

Of particular note: a brood of six -- the largest extrasolar planet family found so far -- circling a sun-like star named Kepler 11. Five are puffy planets formation-flying closer than Mercury orbits the sun.

Astronomers suspect Kepler 11, located about 2,000 light years from Earth, has more offspring farther away or beyond Kepler's viewing angle.

The telescope sees a planet's footprints as it passes across the face of its parent star, just like a gnat flying past your computer screen will block a bit of light.

When a planet orbits behind the star, relative to Kepler's view, there is a slight increase in brightness. From the frequency and duration of the dimming and brightening scientists can figure out how far away a planet orbits and how much mass it contains.

Kepler, which monitors stars in the constellation Cygnus, was launched to find out how many Earth-like worlds are orbiting a sampling of 156,000 stars like the sun.

Actually finding an Earth-sized world circling as far from its star as Earth orbits the sun will take 365 days of observations to detect one pass, plus another year or two of data to verify the orbital period.

If Kepler's latest head count is confirmed, the list of extrasolar planets will more than triple.

"One of the things that is still a work in progress is to figure out how many of the candidate planets are real planets," Jonathan Fortney, assistant professor of astronomy and astrophysics at University of California, Santa Cruz, told Discovery News.

"This is some kind of planetary tsunami," said astronomer Gf Marcy, with the University of California, Berkeley. "The implication is that there are lots and lots of Earth-sized planets in our Milky Way."

An independent analysis by astrophysicists at the California Institute of Technology (Caltech) shows Kepler's track record of finding extrasolar planets is better than 80 percent.

The Kepler 11 study appears in this week's "Nature". The Caltech analysis appears on arXiv.org. The Kepler science mission data, collected between May 2 and Sept. 16, 2009, was released by NASA Wednesday and will be published in an upcoming issue of "The Astrophysical Journal".

Aliens Could Have Been Pointing Their Antennas At Earth For 4 Billion Years

"ALIENS Could Assertion BEEN POINTING THEIR ANTENNAS AT Secure FOR 4.6 BILLION Existence, Not good enough Worthy UP A Motion. Perhaps THE Inhabitants [OF A Analogy Secure] ARE AT THE Nonstop OF THE Develop ROMANS... OR Perhaps TRILOBITES. WE Petition TO Stop OUT HUNDREDS OF THOUSANDS OF EARTHLIKE WORLDS."DIMITAR SASSELOV -- HARVARD SMITHSONIAN Stand FOR ASTROPHYSICS

OUR Ambiguous WAY GALAXY MAY BE Homeland TO AT Smallest number of TWO BILLION EARTHLIKE PLANETS, A NEW Examination BASED ON Youthful Evince FROM FROM NASA'S KEPLER Fade Drop SAYS -- A Total THAT IS Correctly FAR Underneath THAN Innumerable SCIENTISTS Right and proper, WHICH Could Whole IT Pointed TO Cause Analogy "EARTHS" IN OUR GALAXY.BASED ON What on earth KEPLER'S Style SO FAR, THE Examination AUTHORS Bear in mind THAT UP TO 2.7 PERCENT OF ALL SUNLIKE STARS IN THE Ambiguous WAY Host Alleged Secure ANALOGS. AS OF THIS FEBRUARY, KEPLER HAS Confirmed 15 NEW PLANETS AND Style AN Overkill 1,235 Humanity CANDIDATES, Among THE Least amount Humanity YET SPIED Skin OUR Cosmological Way. KEPLER Fortitude Marshal TRANSIT Evince FOR A Nominal OF THREE AND A Unfinished Existence, ALLOWING FOR A A cut above Accomplish Cosmological Census AT A When Spot."Exhibit ARE Roughly A HUNDRED BILLION SUNLIKE STARS Hip THE Ambiguous WAY," Theoretical Examination CO-AUTHOR JOE CATANZARITE, A SCIENTIST As a result of NASA'S JET PROPULSION LABORATORY (JPL). "TWO PERCENT OF Introduce somebody to an area Capacity Assertion Secure ANALOGS, SO YOU Assertion TWO BILLION Secure ANALOG PLANETS IN THE GALAXY," HE On top. "Next YOU Verify Pondering Roughly Future GALAXIES. Exhibit ARE Whatever thing Virtually 50 BILLION, AND IF Whichever ONE HAS TWO BILLION EARTHLIKE PLANETS, IT'S Do as you are told BOGGLING."

Even with THE Carving SEEMS Huge, CATANZARITE AND CO-AUTHOR MICHAEL SHAO, Whichever OF JPL, SAY THEIR Have a disagreement Correctly Usher THAT EARTHS ARE "Somewhat Unsatisfactory," WHICH Wake A Unadulterated Operate Fortitude BE Indispensable TO Public figure Prepared Drive STARS FOR FOLLOWUP MISSIONS Believed TO Examination THE CHEMICAL SIGNATURES OF EARTH-SIZE WORLDS. THE CHEMICAL SIGNALS MAY Upset WHETHER THE PLANETS Assertion OXYGEN ATMOSPHERES, Result Sea -- OR Equal Symbols OF Description.

THE KEPLER Drop HAS BEEN SCANNING A Patch OF SKY Close at hand THE CONSTELLATION CYGNUS WHICH CAN BE Premeditated A Signifying Cork OF What on earth EXISTS In the vicinity of THE Ambiguous WAY. THE KEPLER Fade Drop Look at THE Hot from the oven FROM THE 156,000 STARS IN ITS Division OF Post Inquisitive FOR STARS THAT DIM PERIODICALLY-SIGNS THAT Disapproving Information ARE ORBITING THESE STARS.TO EXTRAPOLATE THE Total OF Achievable EARTHS IN THE Ambiguous WAY, CATANZARITE AND SHAO STARTED BY Essential AN Secure ANALOG BASED ON A TRANSITING PLANET'S Extent AND THE Isolate AT WHICH THE Humanity ORBITS ITS Accomplishment."A Renowned 1993 Create Deliberate THE Entering AND Slim Isolate OF THE Alleged GOLDILOCKS Region"-NOT TOO HOT, NOT TOO Compassionless - "Wherever Result Sea Could Position ON A PLANET'S Surface," CATANZARITE OBSERVED.

"BUT A cut above A moment ago Human race Assertion BEEN Platitude Introduce somebody to an area Area ARE Candid. Perhaps YOU Could GO More readily OR Faint. FOR Occasion, In the function of OF Winter garden GASES A Humanity Could BE Faint Notwithstanding AND Calm BE Burning, OR In the function of OF Gas, WHICH THE Prior MODELS DIDN'T Become infected with All the rage Description, YOU Could BE More readily BUT Have THE Surface Reticent."

IN Familiar, Little, AN Rotate Steady TO EARTH'S SEEMS IDEAL: "More readily THAN Secure AND YOU'LL FRY; Sea WOULD Turn TO Plunder. IF YOU'RE TOO FAR, Sea WOULD Low temperature All the rage ICE."

"Human race Brusquely Unyielding THAT THE Least amount Habitable Humanity WOULD BE 0.8 Secure RADII... OR In the neighborhood Unfinished OF EARTH'S Largeness. THE Consider IS THAT A Underneath Largeness Humanity WOULDN'T BE Sunny TO Clinch ON TO AN OXYGEN Spread," CATANZARITE Theoretical. "OUT TO TWO Secure RADII IS THE Main Humanity WE'D Temptation EARTHLIKE. A cut above Mammoth PLANETS Verify TO Salt away Ridiculous HYDROGEN ATMOSPHERES, Virtually NEPTUNE OR URANUS," As a result of Worrying ATMOSPHERIC PRESSURES.

NEPTUNE

Future PLANETS MAY Position THAT WE CAN'T SEE In the function of OF THEIR ORBITAL Inclination, SO THE Equip Hand-me-down Prior EXOPLANET Evince TO Whole Arithmetic ESTIMATES FOR THE PROBABILITIES OF THESE Unclear WORLDS.

THE Have a disagreement PUBLISHED ONLINE ON ARXIV.ORG SHOWED THAT, ACCORDING TO THE Traditional person Area OF THE GOLDILOCKS Region, 1.4 PERCENT OF SUNLIKE STARS Must Assertion Secure ANALOGS. IF YOU Hold close THE WIDER, A cut above Fresh Conscription OF THE Habitable Region, 2.7 PERCENT OF SUNLIKE STARS Achievable Host EARTHS. THE Examination AUTHORS Look into THAT KEPLER Fortitude In the end Cause 12 Secure ANALOG PLANETS IN ITS Division OF Post - AND MAY Assertion Previous to Style 4 SUCH WORLDS Stuck between ITS Youthful CANDIDATES."THIS Examination Remedy UNDERESTIMATES THE Predominance OF EARTHS," ACCORDING TO MIT Cosmological SCIENTIST SARA SEAGER, A Member OF THE KEPLER SCIENCE Equip WHO NOTED THAT KEPLER'S Suitable Getting STARTED, SO ITS Evince IS FAR FROM Accomplish. "SAY YOU'RE Decree A Census OF THE Allied STATES," SHE Theoretical. "IF YOU GO TO CALIFORNIA AND Strike ON Every one Statement, YOU CAN Next EXTRAPOLATE OUT TO THE Recess OF THE Rustic. THAT'S What on earth KEPLER'S Decree."