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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  5nvklj





Rosetta's 'rubber ducky' comet changed color as it neared the sun.  9tpt39

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Rosetta's 'rubber ducky' comet changed color as it neared the sun.

Dragon
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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  Empty Rosetta's 'rubber ducky' comet changed color as it neared the sun.

Post by Dragon Sun Feb 09, 2020 7:52 pm

The Rosetta spacecraft's rubber ducky comet has slowly changed color as it moved through space, from red to blueish and then red again.

According to a new paper published Feb. 5 in the journal Nature, the color change is a signal of a water cycle on the first comet ever visited by a human probe. As comet 67P/Churyumov–Gerasimenko (Rosetta's comet's full name) crossed a boundary in its orbit around the sun, known as the frost line, ice began to turn to gas on its surface, sublimating away into space. When that happened, an outer layer of dirty ice on the comet's surface, full of reddish dust, blew away into the vacuum, revealing the bluer, cleaner ice underneath.

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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  334pu7m
Dragon
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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  Empty Re: Rosetta's 'rubber ducky' comet changed color as it neared the sun.

Post by Dragon Sun Feb 09, 2020 7:54 pm

Rosetta's 'rubber ducky' comet changed color as it neared the sun.  85RiCFprwxFLjYaVT3Xu2F-1024-80
(Image: © ESA/Rosetta/NAVCAM)

A single frame Rosetta navigation camera image of Comet 67P/Churyumov-Gerasimenko.

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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  334pu7m
Dragon
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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  Empty Re: Rosetta's 'rubber ducky' comet changed color as it neared the sun.

Post by Dragon Sun Feb 09, 2020 7:55 pm

Rosetta's 'rubber ducky' comet changed color as it neared the sun.  GANv4vKvQGkSyvzQEdu65j-970-80
(Image credit: European Space Agency)

A diagram shows how the comet changed from redder to bluer and back to red again as it passed the sun.

Source / Image Courtesy


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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  334pu7m
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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  Empty Re: Rosetta's 'rubber ducky' comet changed color as it neared the sun.

Post by Dragon Sun Feb 09, 2020 7:58 pm



Compilation of images taken by Rosetta’s high resolution OSIRIS camera during the mission’s final hours at Comet 67P/Churyumov-Gerasimenko, including its final resting place and one of Philae’s three legs.



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Rosetta's 'rubber ducky' comet changed color as it neared the sun.  334pu7m

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