
The comet being observed by Europe's Rosetta satellite is very gradually spinning down.
The icy dirt-ball takes 12.4 hours to complete one revolution, but mission controllers have noticed that this is extending by about a second a day.
Read more
March 20, 2015 4:20 PM
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The comet being observed by Europe's Rosetta satellite is very gradually spinning down.
The icy dirt-ball takes 12.4 hours to complete one revolution, but mission controllers have noticed that this is extending by about a second a day.
Read more