Comet 2I Borisov at Perihelion in December 2019
Autor:
NASA, ESA, and D. Jewitt (UCLA)
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1826 x 1666 Pixel (4438512 Bytes)
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In this observation, the NASA/ESA Hubble Space Telescope revisited the comet shortly after its closest approach to the Sun. There it was subjected to a greater degree of heating than it had ever experienced, after spending most of its life in the extreme cold of interstellar space. The comet is 298 million kilometres from Earth in this photo, near the inner edge of the asteroid belt. The nucleus, an agglomeration of ices and dust, is still too small to be resolved. The bright central portion is a coma made up of dust leaving the surface. The comet will make its closest approach to Earth in late December, when it will be at a distance of 290 million kilometres.
Comet 2I/Borisov is only the second interstellar object known to have passed through our Solar System.
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Public domain
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Relevantní články
2I/Borisov2I/Borisov, původně C/2019 Q4 (Borisov), je první objevená mezihvězdná kometa, která prolétá naší Sluneční soustavou. Objevil ji 30. srpna 2019 ukrajinský amatérský astronom Gennadij Borisov dalekohledem o průměru 0,6 m na observatoři MARGO na Krymu. Její velikost nebyla přesně určena, ale její průměr je menší než 0,5 km. .. pokračovat ve čtení