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IRON AND ICE
Rosetta Comet Water Different Than Earth Water
by Staff Writers
Pasadena CA (JPL) Dec 12, 2014


This composite is a mosaic comprising four individual NAVCAM images taken from 19 miles (31 kilometers) from the center of comet 67P/Churyumov-Gerasimenko on Nov. 20, 2014. Image courtesy ESA/Rosetta/NAVCAM.

The European Space Agency's Rosetta spacecraft has found the water vapor from comet 67P/Churyumov-Gerasimenko to be significantly different from that found on Earth. The discovery fuels the debate on the origin of our planet's oceans.

The measurements, by the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) instrument, were made in the month following the arrival of the spacecraft on Aug. 6. It is one of the most anticipated early results of the mission, because the origin of Earth's water is still an open question.

Comets are time capsules containing primitive material left over from the epoch when the sun and its planets formed. Rosetta's lander obtained the first images taken from a comet's surface and will provide analysis of the comet's possible primordial composition.

Rosetta will be the first spacecraft to witness at close proximity how a comet changes as it is subjected to the increasing intensity of the sun's radiation. Observations will help scientists learn more about the origin and evolution of our solar system and the role comets may have played in seeding Earth with water, and perhaps even life.


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Related Links
US instruments aboard Rosetta
Asteroid and Comet Mission News, Science and Technology






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IRON AND ICE
Comet probe in race against time to crown stellar feat
Paris (AFP) Nov 14, 2014
Europe's deep-space robot lab Philae worked against the clock Friday, attempting to drill into a comet 510 million kilometres (320 million miles) from Earth to crown a historic exploration before its battery runs out. Charged with 60 hours of onboard power, the lander bounced twice after touchdown Wednesday, settling in a crevice in a mystery location, shadowed from battery-boosting sunlight ... read more


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