Assertion: comet | /r/Synonym | 2i/borisov
Facets:
Source sentences:
text: The comet, known as 2I/Borisov, is moving about 20 miles a second, fast enough to slip through the solar system and escape back into interstellar space.
text: Last year, a comet known as 2I/Borisov was spotted flying through our solar system, having come on an interstellar journey from another planetary system.
text: Known as 2I/Borisov, the comet is said to have the potential to transform what we know about the universe.