Meet 1I/2017 U1 (‘Oumuamua), but make it fast, because it’s already leaving.

Source: First-known interstellar visitor is a bizarre, cigar-shaped asteroid

This is one of the most exciting news stories of the year. We’ve now actually seen an object that had to have come from another solar system, pass through ours. Data collection by the Hubble telescope continues into December, after which point it’s too faint for anything to see again.