Caption: Comet ISON. Solar Terrestrial Relations Observatory (STEREO) footage of Comet ISON (moving object, white) passing close to the Sun in November 2013. The name of the COR2 instrument used is at lower left. Discovered in 2012 using the International Scientific Optical Network (ISON), it was predicted that comet ISON would be one of the brightest comets in history as it passed Earth in 2013. However, most of comet ISON disintegrated as it approached its perihelion (the point at which it passes closest to the Sun) on 28 November 2013. It is thought that this is because it was not large enough to withstand its trajectory around the Sun. The second half of the clip shows a close-up of the perihelion passage. The STEREO footage also shows the solar atmosphere (the corona, white). The COR2 instrument (Outer Coronagraph) is one of five instruments on the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) camera. There are two STEREO spacecraft, with this footage from the STEREO A ('Ahead') spacecraft. This footage is combined in a composite with a central image of the Sun (yellow) from the Solar Dynamics Observatory (SDO).

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Keywords: 2013, 21st century, 28 november 2013, ahead, astronomical, astronomy, astrophysical, astrophysics, comet ison, cometary, composite, cor2, corona, coronagraph, disintegrating, disintegration, footage, heliophysics, international scientific optical network, november, orbit, orbital, outer coronagraph, perihelion, sdo, secchi, solar, solar astronomy, solar dynamics observatory, solar system, solar terrestrial relations observatory, space, stereo, stereo a, sun, sun earth connection coronal and heliospheric investigation, white-light coronagraph

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Comet ISON, STEREO clip

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