Astronomy

An interstellar comet revealed

Comet 2I/Borisov
Comet 2I/Borisov. Photo: Gemini Observatory/NSF/AURA

The interstellar comet discovered in August looks very similar to comets originating in our own solar system, according to a new study in Nature Astronomy this week.

The big picture: Comet 2I/Borisov represents just the second-known interstellar object to make its way through our solar system, and it's astronomers' best chance so far to study a piece of a distant star system at close range.

The hunt for a new kind of black hole

Illustration: Eniola Odetunde/Axios

Astronomers have found indirect evidence of a new type of black hole, and they're now making advances toward seeing one for the first time.

Why it matters: Known as intermediate-mass black holes, these mysterious objects could be the key to unlocking how galaxies evolved, revealing more about why our universe looks the way it does.