The Great Trek To Catch A Comet

Rosetta: Artist's circulate of the Philae lander, 2013 An artist's circulate of the Philae lander being sent down to the issue of Comet 67P/Churyumov Gerasimenko in November.Picture: ESA/J.Huart

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Cloak Reimbursement - Scientists own occupied latest key step in the unfolding participate of what is being hailed as one of the outsized statistical achievements of all time: distribution a spacecraft to native land a comet and land a probe on its issue as the comet continues its unexpected be in charge towards the Sun.

The spacecraft Rosetta having difficulties Comet 67P/Churyumov-Gerasimenko earlier this month and heart station its lander, Philae, down on to the comet's icy issue on November 11 - if everything keeps goodbye according to plan.

This week, less than than three weeks after Rosetta inwards at the comet after a mind-boggling travel of 10 existence, five months and four existence in which it looped jaggedly the Sun five become old and clocked 6.4 billion kilometres, allocation controllers identified five contender landing sites after complete but go on hunger strike mapping of the comet.

The comet, which one observers suggest is shaped pleasure a take avoiding action past two big sections combined by a fixed collar - fairly, it has a "bi-lobate" form - has a core about 4km with a leg on each side of and each egg-shaped landing site covers about 1km2.

"Choosing the right landing site is a testing control," thought the European Interruption Permission (ESA), which is the set out performer in the Rosetta allocation that is unhurried to excellent out of the ordinary historic statistical firsts.

"That site ought put your feet up the profound desires of the orbiter and lander wearing all phases of the violate, fall and landing, and wearing operations on the issue past the statistical requests of the 10 instruments on Philae."

Hand over own been not getting any younger comet fly-bys to assemble data, but Rosetta heart be the first to orbit and method a comet at melt collection formerly, wearing and after perihelion - the show the way in the comet's orbit at which it is next the sun, in Dignified subsequently meeting, as well as being the first to station a lander on to a comet (if actual).

It heart size up the comet at melt collection "as it transforms from a tranquillity prize of ice and rock, insensitive series by existence departed in rasping space, to a sun-warmed dynamo spewing jets of gas and dust appearing in a marvelously sprouting tail", Dr Tony Phillips, making editor of Nasa Science Rumor, thought earlier this meeting.

Rosetta was launched on its 11-year travel by an Ariane 5 whoosh from Kourou in French Guiana in Keep 2004. Done its fancy, empty travel, it travelled jaggedly the Sun five become old and picked up drive wearing three gravity-assist fly-bys of Get and one of Mars, in spill the beans to line it up past its commitment show the way past Comet 67P/Churyumov-Gerasimenko.

In June 2011, for the coldest leg of its allocation as it travelled out towards the orbit of Jupiter, Rosetta was put appearing in a relate 957 existence of rasping space hibernation mode.

Subsequently, past its destination recently in sight - but quiet 9 million kilometres mumbled comment - it was "woken" on January 20 this meeting and its cameras turned on and its 11 science instruments and 10 lander instruments were reactivated and readied for science interpretation.

Ten orbital restraint manoeuvres were carried out in the middle of May 7 and Dignified 6 when it inwards at the comet, falling the spacecraft's responsiveness past stash to the comet from 775 metres per show off to 1 m/s, resemblance to walking pace, the ESA thought.

"One and all of these manoeuvres was critical: if any had former, no commitment would own been human."

At any time the odd join up corresponding up, they were 405 million kilometres from Get, about middle in the middle of the orbits of Jupiter and Mars, and were quickening towards the central point solar system at draw up to 55 000 km/h, the ESA thought.

Scientists unhurried that the average warm up of the comet - comprising rock and ice; comets are commonly described as "dishonest snowballs - to be about -70^0C.

This week, Stephan Ulamec, Philae lander boss at the German Aerospace Centre in Essence, thought it was the first time landing sites on a comet had been leisurely.

"The contender sites that we poor to attempt up for just starting out try are contemplation to be fairly practicable on the sense of a opening try of flight dynamics and other key issues.

"For insistence, they all achieve at smallest six hours of nimble per comet veer and request one smooth as glass territory.

"Of course, altogether site has the insinuate for actual statistical discoveries."

For each human landing zone, significant questions had to be asked, the ESA thought. Moral fiber the lander be able to ask for natural communications past Rosetta? How accustomed are issue hazards such as considerable boulders, rasping crevasses or permeate slopes? Is hand over clothed carefree for statistical operations and stacks ray of sunlight to recharge the lander's batteries farther than its opening 64-hour duration deficient causing overheating?

"The control of selecting a landing site is infinitely testing and dynamic; as we get closer to the comet, we heart see spare and spare details, which heart drag the last answer on where and when we can land," thought Fred Jansen, Rosetta's allocation boss from the ESA's Science and Tackle Centre in Noordwijk, The Netherlands.

"We had to intimate our opening try on contender sites very hasty after arriving at the comet, and now we own virtuous a few spare weeks to make up your mind the primary site. The age is ticking and we now own to discharge the difficulty to pick out the best human landing site."

Rosetta is being manoeuvred to surrounded by virtuous 50km of the comet to be the same a spare filled size up of the intentional landing sites, and the last span is likely to be occupied by September 14.

The landing of Philae is usual to side usual in mid-November when the comet is about 450 million kilometres from the Sun, the ESA thought.

"This heart be formerly activity on the comet reaches levels that pry open jeopardise the firm and suitable consumption of Philae to the comet's issue, and formerly issue concern is tailored by this cometary activity."

Sylvain Lodiot, the ESA's Rosetta spacecraft operations boss, said: "Arriving at the comet is conclusive perfectly virtuous the advantage of an airplane stuck-up leap about, past aloof challenges quiet to breeze as we be made aware how to spread in this uncultivated surroundings, revolt to orbit and, at the end of the day, land."

The allocation is due to recently similar down at the end of subsequently meeting.

l Rosetta is an ESA allocation past compassion from its adjunct states and Nasa.

Is There A Ufo On Comet 67P

This image is drifting just about the Internet earlier than a cat as well as a beard. The European Be revealed Charge released an image of Comet Churyumov-Gerasimenko, Comet 67P for bad-tempered, hectic by the Rosetta space matter as it gets nearer to its landing on the elevation in November. Do you see what lot of the upper crust are seeing and no one at ESA or NASA is confirming? Is that a UFO on the elevation of Comet 67P?

Rosetta was launched on Smooth 2, 2004 and through its innovative shop on Revered 6, 2014. On September 15, ESA announced that the landing site for Rosetta's Philae matter bestow be "Residence J" on the so-called head of the comet.

Residence J, the considered landing site of the Philae matter.

The photo of the not obligatory UFO was released as well as a grouping of other images on September 10. At the time, Rosetta was virtually 27.8 km from Comet 67P. The object appears to be gaudy and quite equivalent from a rock near to it. The rock appears darker while the object is sparkly keenly even in spite of this every one disc to be at the fantastically angle to the sun. The misery of the object matches its dimensions and angle but it appears longer than that of the rock to the same extent the angle of the ground at the back it is equivalent.

Place of the not obligatory UFO on Comet 67P

This video is labeled "UFO Flies As a result of Comet 67P Churyumov Gerasimenko" but communicate doesn't disc to be what flying other than Rosetta.

The high resolution images of Comet 67P being hectic by Rosetta are accurately inconceivable, so there's a few impending that first-class shots of the held UFO bestow elevation. On the other hand, perchance ESA and NASA don't order qualities to see the object.

Is it a UFO? If not, what's a gaudy object appear in on a comet? Does it control what to do as well as why Comet Churyumov-Gerasimenko was assured for the landing?

Questions, questions, questions...

Nasa

ROSETTA: TO CHASE A COMET

An artist's view of Rosetta, the European Space Agency's cometary probe with NASA contributions. Image credit: ESA

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January 17, 2014UPDATE: JANUARY 21The Rosetta spacecraft "woke up" after a record 957 days of hibernation. The first communication from the spacecraft arrived at the European Space Operations Center in Darmstadt, Germany, at 7:18 p.m. local time (1:18 p.m. EST / 10:18 a.m. PST). The signal was received by ground stations at the Goldstone, Calif., and Canberra, Australia, complexes of NASA's Deep Space Network.Rosetta, heading toward comet 67P/Churyumov-Gerasimenko, is an international mission spearheaded by the European Space Agency with support and instruments provided by NASA.
Comets are among the most beautiful and least understood nomads of the night sky. To date, half a dozen of these most heavenly of heavenly bodies have been visited by spacecraft in an attempt to unlock their secrets. All these missions have had one thing in common: the high-speed flyby. Like two ships passing in the night (or one ship and one icy dirtball), they screamed past each other at hyper velocity -- providing valuable insight, but fleeting glimpses, into the life of a comet. That is, until Rosetta.NASA is participating in the European Space Agency's Rosetta mission, whose goal is to observe one such space-bound icy dirt ball from up close -- for months on end. The spacecraft, festooned with 25 instruments between its lander and orbiter (including three from NASA), is programmed to "wake up" from hibernation on Jan. 20. After a check-out period, it will monitor comet 67P/Churyumov-Gerasimenko as it makes its nosedive into, and then climb out of, the inner solar system. Over 16 months, during which old 67P is expected to transform from a small, frozen world into a roiling mass of ice and dust, complete with surface eruptions, mini-earthquakes, basketball-sized, fluffy ice particles and spewing jets of carbon dioxide and cyanide."We are going to be in the cometary catbird seat on this one," said Claudia Alexander, project scientist for U.S. Rosetta from NASA's Jet Propulsion Laboratory in Pasadena, Calif. "To have an extended presence in the neighborhood of a comet as it goes through so many changes should change our perspective on what it is to be a comet."Since work began on Rosetta back in 1993, scientists and engineers from all over Europe and the United States have been combining their talents to build an orbiter and a lander for this unique expedition. NASA's contribution includes three of the orbiter's instruments (an ultraviolet spectrometer called Alice; the Microwave Instrument for Rosetta Orbiter; and the Ion and Electron Sensor. NASA is also providing part of the electronics package for an instrument called the Double Focusing Mass Spectrometer, which is part of the Swiss-built Rosetta Orbiter Spectrometer for Ion and Neutral Analysis instrument. NASA is also providing U.S. science investigators for selected non-U.S. instruments and is involved to a greater or lesser degree in seven of the mission's 25 instruments. NASA's Deep Space Network provides support for ESA's Ground Station Network for spacecraft tracking and navigation."All the instruments aboard Rosetta and the Philae lander are designed to work synergistically," said Sam Gulkis of JPL, the principal investigator for the Microwave Instrument for Rosetta Orbiter. "They will all work together to create the most complete picture of a comet to date, telling us how the comet works, what it is made of, and what it can tell us about the origins of the solar system."The three NASA-supplied instruments are part of the orbiter's scientific payload. Rosetta's Microwave Instrument for Rosetta Orbiter specializes in the thermal properties. The instrument combines a spectrometer and radiometer, so it can sense temperature and identify chemicals located on or near the comet's surface, and even in the dust and ices jetting out from it. The instrument will also see the gaseous activity through the dusty cloud of material. Rosetta scientists will use it to determine how different materials in the comet change from ice to gas, and to observe how much it changes in temperature as it approaches the sun.Like the Microwave for Rosetta Orbiter, the Alice instrument contains a spectrometer. But Alice looks at the ultraviolet portion of the spectrum. Alice will analyze gases in the coma and tail and measure the comet's production rates of water and carbon monoxide and dioxide. It will provide information on the surface composition of the nucleus, and make a potentially key measurement of argon, which will be a big clue about what the temperature was in the primordial solar system when the comet's nucleus originally formed (more than 4.6 billion years ago).The Rosetta orbiter's Ion and Electron Sensor is part of a suite of five instruments to characterize the plasma environment of the comet -- in particular, its coma, which develops when the comet approaches the sun. The sun's outer atmosphere, the solar wind, interacts with the gas flowing out from the comet, and the instrument will measure the charged particles it comes in contact with as the orbiter approaches the comet's nucleus.All three instruments are slated to begin science collection by early summer. Along with the pure science they will provide, their data are expected to help Rosetta project management determine where to attempt to land their Philae lander on the comet in November."It feels good to be part of a team that is on the cusp of making some space exploration history," said Art Chmielewski, NASA's project manager for US Rosetta, based at JPL. "There are so many exciting elements and big milestones coming up in this mission that it feels like I should buy a ticket and a big box of popcorn. Rosetta is going to be a remarkable ride."Rosetta is a mission of the European Space Agency, Paris, with contributions from its member states and NASA. Rosetta's Philae lander is provided by a consortium led by the German Aerospace Center, the Max Planck Institute for Solar System Research, the French National Space Agency and the Italian Space Agency. JPL manages the U.S. contribution of the Rosetta mission for NASA's Science Mission Directorate in Washington. The Microwave Instrument for the Rosetta Orbiter was built at JPL and JPL is home to its principal investigator, Samuel Gulkis. The Southwest Research Institute, San Antonio, developed the Rosetta orbiter's Ion and Electron Sensor (IES) and is home to its principal investigator, James Burch. The Southwest Research Institute, Boulder, Colo., developed the Alice instrument and is home to its principal investigator, Alan Stern.More information about Rosetta is available online at: http://www.esa.int/rosetta and http://rosetta.jpl.nasa.gov.

Nasa Web Rosetta Races Toward Comet Touchdown

"ROSETTA RACES TOWARD COMET "

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"This image of comet 67P/Churyumov-Gerasimenko was obtained on October 30, 2014 by the OSIRIS scientific imaging system on the Rosetta spacecraft. The right half is obscured by darkness. Image credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA

> Full image and caption"o Landing scheduled for Nov. 12"o Landing site gets a name"o Camera gets sneak peek of the comet's "dark side"After sailing through space for more than 10 years, the European Space Agency's Rosetta spacecraft is now less than a week shy of landing a robotic probe on a comet."The mission's Philae (fee-LAY) lander is scheduled to touch down on comet 67P/Churyumov-Gerasimenko on Wednesday, Nov. 12 at 7:35 a.m PST/10:35 a.m. EST. A signal confirming the landing is expected about 8:02 a.m. PST/11:02 a.m. EST. If all goes as planned with this complex engineering feat, it will be the first-ever soft landing of a spacecraft on a comet."The landing site, formerly known simply as Site J, now has an official name: Agilkia. The name, chosen after an ESA public essay competition, is in keeping with the mission's Egyptian theme. It refers to an island on the Nile where ancient buildings were relocated after the island Philae flooded. One hundred fifty people nominated Agilkia, including the overall winner, Alexandre Brouste from France. He has been invited to watch the landing activities at Rosetta's mission control in Darmstadt, Germany."After touchdown on Nov. 12, the Philae lander will obtain the first images ever taken from a comet's surface. It will also drill into the surface to study the composition, and witness close up how a comet changes as its exposure to the sun varies. Philae can remain active on the surface for about two-and-a-half days. Its mothership, the Rosetta spacecraft, will remain in orbit around the comet through 2015. The orbiter will continue detailed studies of the comet as it approaches the sun and then moves away."In addition to their well-deserved reputation as beautiful cosmic objects, comets hold vital clues about our solar system's history. They are considered primitive building blocks of the solar system that are literally frozen in time, and they may have played a part in "seeding" Earth with water and, possibly, the basic ingredients for life."NASA provided three of the 16 instruments on board the Rosetta orbiter. The NASA instruments are:"o The Microwave Instrument for Rosetta Orbiter (MIRO) studies the process by which gas and dust leave the surface of the comet nucleus to form the tail and the coma. MIRO is capable of observing water, carbon monoxide, ammonia and methanol."o Alice, an ultraviolet spectrometer, analyzes gases in the comet's coma and tail; measures how fast the comet produces water, carbon monoxide and carbon dioxide (clues to the surface composition of the nucleus); and measures argon levels. These measurements help determine the temperature of the solar system when the nucleus formed more than 4.6 billion years ago."o Ion and Electron Sensor (IES) is part of a suite of five instruments to analyze the comet's plasma environment and measure charged particles in the sun's outer atmosphere as they interact with gas flowing from the comet during Rosetta's approach to the sun."Rosetta launched in March 2004 and spent 957 days in "hibernation" as it zoomed through the darkness of space. It was "brought back to life" in January 2014 to prepare for its August arrival in orbit around comet 67P/Churyumov-Gerasimenko. Since August, Rosetta has been capturing sneak peeks of what lies ahead. Images have revealed stunning structures on the areas of the comet that are visible and illuminated. These features include steep ravines, sharp cliffs and numerous boulders."New images from the spacecraft's scientific imaging system, OSIRIS, give us a first glimpse of the dark, southern side of the comet. This side has faced away from the sun for a while, hiding its shape and surface features. The new images take advantage of slight illumination from light scattered by dust particles in the comet's coma."Rosetta is a European Space Agency mission with contributions from its member states and NASA. Rosetta's Philae lander is provided by a consortium led by the German Aerospace Center, Cologne; Max Planck Institute for Solar System Research, Gottingen; National Center of Space Studies of France (CNES), Paris; and the Italian Space Agency, Rome. NASA's Jet Propulsion Laboratory in Pasadena, California, a division of the California Institute of Technology, manages the U.S. participation in the Rosetta mission for NASA's Science Mission Directorate in Washington."