First measurements of 'interstellar comet'
First measurements of 'interstellar comet' Astronomers are gathering measurements on a presumed interstellar comet, providing clues about its chemical composition. The object, C/2019 Q4 (Borisov), is only the second interstellar object ever identified, after 'Oumuamua, which was spotted in 2017.cometinterstellarLINK