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 (Віталь Неўскі, Vitebsk, Belarus) and Artyom Novichonok (Артём Новичонок, Kondopoga, Russia).

2013年7月15日 · NASA has initiated a Comet ISON Observing Campaign to facilitate a massive global observation campaign incorporating both space-based and ground-based telescopes and encouraging citizen scientists and both professional and amateur astronomers to participate. Read on for a timeline of observations expected of Comet ISON on its perilous journey.

2019年1月4日 · Comet ISON was a sungrazing comet that was expected to put on a spectacular show in Earth's sky in late 2013. However, shortly after rounding the sun's far side on...

2024年11月3日 · C/2012 S1 (ISON) was the subject of the most coordinated comet observing campaign in history. Over the course of a year, more than a dozen spacecraft and numerous ground-based observers collected what is believed to be the largest single cometary dataset in history as ISON plunged toward a close encounter with the Sun.

2013年3月29日 · Comet ISON is now approaching the inner solar system. Discovered last year, the comet remains unusually active for its distance from the sun. If current trends continue, ISON could rank as one of the brightest comets in decades when it makes its close approach to the sun in late November.

Anticipated STEREO observations of Comet ISON. New: Where to view Comet ISON's encounter with the Sun. Comet C/2012 S1 was discovered in September 2012 by Russian astronomers Vitali Nevski and Artyom Novichonok using data from the International Scientific Optical Network (ISON). For that reason, it is also known as Comet ISON.

2013年12月13日 · Comet ISON was a rare interloper in the inner solar system from the faraway Oort Cloud, a sphere of comets that surrounds the sun and planets about a light-year away. Its trajectory brought it...

2013年11月20日 · Comet C/2012 S1, better known as comet ISON, may become a dazzling sight as it traverses the inner solar system in late 2013. During the weeks before its Nov. 28 close approach to the sun, the comet will be observable with small telescopes, and binoculars.

2013年11月22日 · Comet ISON swoops around the sun and through Scorpius. This composite merges an SDO AIA 171 sun image (Nov. 28, 2214 UT), SOHO C2 (2036 UT) and C3 (2030 UT) images, and a Digitized Sky Survey view of the sky in northern Scorpius. Credit: NASA/ESA/SOHO, NASA/SDO, DSS, and Francis Reddy.

2023年11月21日 · Comet ISON, on the other hand, moves on a hyperbolic orbit and makes a single pass into our inner solar system. After its (hopefully) spectacular display in November and December, it will return to the deep freeze of interstellar space, never to be seen again.