A new comet discovered by amateur astronomer Gennady Borisov is an outcast from another star system, yet its properties are surprisingly familiar, a new study led by Jagiellonian University researchers shows. The team’s findings are being published in Nature Astronomy on 14 October 2019.
Source:
https://phys.org/news/2019-10-2iborisov-interstellar-comet-familiar.html