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Comet ISON
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Comet ISON, formally known as C/2012 S1, was a sungrazing comet from the Oort cloud which was discovered on 21 September 2012 by Vitaly Nevsky and Artyom Novichonok.
Comet ISON as captured by TRAPPIST on 15 November 2013
Comet ISON as captured by TRAPPIST on 15 November 2013
Comet ISON, imaged by the Hubble Space Telescope on 10 April 2013—near Jupiter's orbit; also, enhanced (coma model ratio) version
Comet ISON, imaged by the Hubble Space Telescope on 10 April 2013—near Jupiter's orbit; also, enhanced (coma model ratio) version
Comet ISON seen from the Mount Lemmon SkyCenter on 8 October 2013, as it passes through the constellation of Leo
Comet ISON seen from the Mount Lemmon SkyCenter on 8 October 2013, as it passes through the constellation of Leo
Sungrazing comet
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A sungrazing comet is a comet that passes extremely close to the Sun at perihelion – sometimes within a few thousand kilometres of the Sun's surface. Although small sungrazers can completely evaporate during such a close approach to the Sun, larger sungrazers can survive many perihelion passages. However, the strong evaporation and tidal forces they experience often lead to their fragmentation.
Comet ISON taken with the Wide Field Camera 3 on April 30, 2013.
Comet ISON taken with the Wide Field Camera 3 on April 30, 2013.