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“Comets”

Apr 3, 2015 03:48 PM ET // Ian O'Neill
As the European Rosetta spacecraft continues to explore Comet 67P/Churyumov-Gerasimenko as it gradually gets closer to the sun, it's having to deal with some very inclement orbital weather.
Mar 19, 2015 07:00 AM ET // Irene Klotz
The comet being studied by Europe's Rosetta spacecraft may be made entirely of pebbles, challenging currently held theories of how bodies form in the far reaches of the solar system.
Mar 16, 2015 03:04 PM ET // Ian O'Neill
There is an exclusive group of celestial bodies that are known to possess rings in our solar system -- now a second asteroid-comet hybrid has been found to sport one.
Mar 3, 2015 01:03 PM ET // Ian O'Neill
During the Rosetta's close flyby of comet Comet 67P/Churyumov-Gerasimenko on Feb. 14, the European spacecraft snapped images of the comet's 'belly' revealing a shadow of itself surrounded by a halo.
Feb 18, 2015 03:01 PM ET // Ian O'Neill
Astronomers have discovered a star that carried out a stellar hit-and-run 70,000 years ago... and our solar system was the victim.
Feb 12, 2015 01:03 PM ET // Ian O'Neill
From a distance of 100 kilometers, the European Rosetta mission captured a stunning overall view of Comet 67P/Churyumov-Gerasimenko and its strengthening jets of vapor.
Feb 10, 2015 04:11 PM ET // Ian O'Neill
Comets are weird. And they're about to get weirder.
Jan 22, 2015 02:00 PM ET // Irene Klotz
Early results from Europe’s ongoing Rosetta comet mission show the icy body, believed to be a remnant from the formation of the solar system, is far more complex and diverse than scientists expected.
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