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“Comet”

Jul 1, 2015 01:00 PM ET // Irene Klotz
Scientists have found gigantic sinkholes more than 200 yards (183 meters) in diameter -- twice the length of a football field -- and just about as deep breaking the surface of the comet being studied by the orbiting Rosetta spacecraft.
Jun 25, 2015 05:47 PM ET // Irene Klotz
A planet about the size of Neptune but situated 33 times closer to its parent star than Earth orbits the sun is losing its atmosphere, forming a fat, comet-like tail in the process.
Jun 25, 2015 06:50 AM ET // Larry O'Hanlon
Magnesium and iron measurements suggest the hourly meteor rate overhead on Mars must have been tens of thousands of shooting stars per hour for hours.
Jun 22, 2015 06:43 PM ET // Irene Klotz
Ground control teams overseeing Europe’s Philae comet lander begin the week with some good news: The intrepid robot is back talking to the orbiting Rosetta spacecraft.
Jun 17, 2015 12:15 PM ET // Irene Klotz
After a 7-month hiatus, the revived European comet lander is nearly ready to resume work, expanding on our scientific understanding of the solar system.
Jun 12, 2015 01:55 PM ET // Ian O'Neill
Could this bright glinting object on Comet 67P/Churyumov-Gerasimenko's surface be Europe's lost comet lander?
Jun 2, 2015 04:33 PM ET // Ian O'Neill
Strange bright swirls have long been known to exist on the moon's surface and their origin is steeped in mystery -- might comets be the culprit?
May 11, 2015 06:00 AM ET // AFP
Europe launched a new bid Friday to communicate with its comet lander Philae, hurtling towards the sun some 360 million kilometers (224 million miles) from Earth.
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