comet

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Comet Ikeya-Seki,long-period comet that is one of a group of Sun-grazing comets having similar orbits and including the great comet known as 1882 II. Comet Ikeya-Seki was discovered Sept. 18, 1965, by two Japanese amateur astronomers, Ikeya Kaoru and Seki Tsutomu. Moving in a retrograde orbit, the comet made its closest approach to the Sun on Oct. 21, 1965, at a distance less than a solar radius from the surface.

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Via: NASA
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Via NASA:

Comet Lovejoy, C/2014 Q2, is framed like a cosmic Christmas tree with starry decorations in this colorful telescopic portrait, snapped on December 16th. Its lovely coma is tinted green by diatomic C2 gas fluorescing in sunlight. Discovered in August of this year, this Comet Lovejoy is currently sweeping north through the constellation Columba, heading for Lepus south of Orion and bright enough to offer good binocular views. Not its first time through the inner Solar System, this Comet Lovejoy will pass closest to planet Earth on January 7,
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Via: Daily Mail
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Esa's Rosetta mission is currently making its way towards a comet in the solar system. And, in a series of stunning new images, it reveals how comet 67P/Churyumov-Gerasimenko has begun to develop into an exciting ball of dust and gas. Over a period of six weeks the comet has begun to extend its dusty veil known as a 'coma' into space.
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