This Comet Might Be from Interstellar Space. Here's How We Could Find Out.

September 15, 2019

At first, it was just another bright, fuzzy speck in the sky. But it may turn out to be something much more exciting: the second known object to hurtle through our solar system after leaving another system. Astronomers will need a lot more observations before they can be confident giving the comet that title, but early data about the object seems promising.