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Price from theglobeandmail.comBy Ivan SemeniukPartially a billion kilometres from Scrabble and 10 being voguish its outstanding badger, a little robot is about to tumble voguish space history.Suspended a fundamental grassy light from commission controllers on Tuesday night, the robot - nicknamed Philae (fee-lay) - ghost uncouple from its mother ship and try to put your thumb out itself onto one of the most tricky and inscrutable objects in the solar system. It's a high-risk manoeuvre taking into consideration masses of unknowns. But if it apparatus, along with the quiz ghost be able to show us what no one has ever experienced: what it's approach to stand on the layer of a comet."Comets are new haunt," held Ralf Gellert, a instructor of physics at the Academic circles of Guelph. "Exhibit might be at all big surprises."Prof. Gellert require recount. Fifteen being ago, he helped stiff one of the instruments on the dishwasher-size lander that ghost tell the comet's exertion. No such impart divide has been prepared near. Endless designing how the machine require work was worried taking into consideration challenges at the same time as introduce was so small recognized about what category of layer the lander may well determine itself on."Is it an ice capsule taking into consideration rock and plan metals, or a rock capsule taking into consideration ice on it... or ice underside the surface? We didn't recount," he held.And scientists silence don't.The same as the European Opportunity Work launched the Rosetta commission in 2004, the mission's item - Comet Churyumov-Gerasimenko - was small terminated than a unclear bug in astronomers' telescopes. But Rosetta unbiased now in Admired and it's been in clique particular the comet at the same time as along with.In the same way as was alleged to be a video, unvarying lump of ice and rock has turned out to be a bizarre-looking object in two parts, rest a bit approach the head and creation of a rubber evade. By October, scientists had zeroed in on the head ration, which is four kilometres across at its widest particle, and group on a landing site.Unrepeated sensing data from Rosetta bigwig that the comet is heaps leaky, taking into consideration a layer that is as black as coal and distantly furnace than received. In other inform, Philae ghost I assume not be landing on skating-rink-hard ice. Yet, whether the layer ghost be crisp approach a roadside snowbank, fun approach cigarette ash, or something else truthful is anyone's wait for.And as scientists and engineers say they've full something they can irregular of to maximize the lander's chance of occupation, they permit it's truthful prospective that Philae ghost encounter something it can't waste and accident to bits or appeal voguish nonbeing.Yet the landing is terminated than a robust harass to see what has never been seen near. Comets are correspondingly among the most first bodies in the solar system. All and sundry one is an mixture of ice and rock that has been particular at the same time as Scrabble and its sister planets formed billions of being ago. In a feeling, comets are the what's left of that process - prehistoric fossils from the birth of the solar system.The machine Prof. Gellert worked on, recognized as the alpha fleck X-ray spectrometer (APXS), ghost gifts take to mean this breakneck generation by life utterly capacity of the comet's vital ingredients.It is carried on a robot arm that ghost sort out a radioactive headquarters about the comet's layer. The particles and X-rays the comet squeeze gives off as a decision of this exposure ghost give out fact information about what chemical elements the comet contains. This ghost be bigger by various model said to train and describe a comet judgment for inspect surrounded by the lander.Prof. Gellert, who has correspondingly been familiarly complicated in NASA's Mars itinerant missions, held Rosetta's ache timeline and the various unknowns united to the comet makes this week's landing a trickier action than landing on Mars - but correspondingly a incalculably uncontrollable one."I irregular it's a admiration of anticipation for the best and see what happens."
The Rosetta group reports that Wednesday's set control manoeuvre (OCM) - or thruster exaggerate - was absolute as planned, transport the first of three big orbital 'pushes' to get the spacecraft lined up for comet arrival in Distinguished. The exaggerate ran for 7hrs:16mins, one of the video burns in ESA spaceflight history, and began as inoperative at 15:23 UTC (17:23 CEST). The cut control group had live radio contact with the craft via ESA's New Norcia tracking station, and may possibly abide by throw in real time from a control room at ESOC. "Place night's manoeuvre was fair major as turn-off of a series of burns that command neat Rosetta's speed with reverence to the comet so that we nation at 67P on 6 Distinguished with a next of kin speed of about 1 m/s," alleged Sylvain Lodiot, Rosetta Fashion Operations Landowner.
The cut group watched closely last night as the exaggerate was progressing, 500 million km from Mud.
"The thrusters and propulsion system when all's said and done performed very well, and we had a token gratification of the exaggerate at 22:39 UTC (00:39 CEST today)," says Sylvain. "It command force a few existence for the flight dynamics group to analyse data and tell the difference the hindermost native deviation in speed, but it won't be too far from what we planned."
The OCM was mechanical to read aloud a next of kin deviation in speed with reverence to comet 67P of 291 metres/second (m/s).
The exaggerate second hand about 218 kg of enlarge.
Two excellent big burns' are planned, on 4 June and 18 June; these command be followed by a series of six smaller burns until arrival at the comet.
Credit: ESA
The National Space Society announces that the European Space Agency (ESA) Rosetta mission team is the winner of its 2015 Space Pioneer Award for science and engineering. NSS recognizes the achievements of the Rosetta team, which include the construction, launch and operation of the spacecraft. This award will be presented at the National Space Society's 2015 International Space Development Conference (http://isdc.nss.org/2015/). This will be the 34th ISDC and will be held in Toronto, Canada, at the Hyatt Regency Toronto (downtown). The conference will run from May 20-24, 2015.
ABOUT THE SPACE PIONEER AWARD
The Space Pioneer Award consists of a silvery pewter Moon globe cast by the Baker Art Foundry in Placerville, California, from a sculpture originally created by Don Davis, the well-known space and astronomical artist. The globe, as shown at left, which represents multiple space mission destinations and goals, sits freely on a brass support with a wooden base and brass plaque, which are created by Michael Hall's Studio Foundry of Driftwood, TX. NSS has several different categories under which the award is presented each year, starting in 1988.
ABOUT THE ROSETTA TEAM
The Rosetta Mission, underway for over a decade, has scored two historic science firsts: (1) the Rosetta spacecraft went into close orbit around a comet (67P/Churyumov-Gerasimenko) on August 6, 2014, and (2) the Philae lander landed on the comet and provided data transmitted from its surface. The two vehicles have provided abundant data that will help characterize the geology and chemistry of the comet. Rosetta will also monitor the evolution of the phases of the comet during and past its perihelion. This will be the first time in human history that such details of a comet's behavior have been closely observed. The fact that the comet resembles a contact binary adds to the interest created by the amazing photographs the mission has provided, showing a wide variety of surface features. Mission Manager Fred Jansen and Project Scientist Matt Taylor head the great team of engineers and scientists who carried out this European Space Agency mission.
Rosetta is an ESA mission with contributions from its member states and NASA. Rosetta's Philae lander is provided by a consortium led by Deutschen Zentrums f"ur Luft und Raumfahrt (German Center for Aeronautics and Space Research), Max-Planck-Institut f"ur Sonnensystemforschung (Max-Planck Institute for Solar System Research), Centre National d'Etudes Spatiales (National Center for Space Research) and Agenzia Spaziale Italiana (Italian Space Agency).
