从星际空间来的博里索夫彗星
2022年3月5日 Interstellar Comet 2I Borisov NASA, ESA, and D. Jewitt (UCLA) et al. Explanation: From somewhere else in the Milky Way galaxy, Comet 2I/Borisov was just visiting the Solar System. Discovered by amateur astronomer Gennady Borisov on August 30, 2019, the first known interstellar comet is seen in these two Hubble Space Telescope images from November a...