Astronomers Discover Largest-Known Comet Was Active at Near-Record Distance

astronomers have revealed the closest pair of supermassive black holes to Earth ever observed. The two objects also have a much smaller separation than any other previously spotted pair of supermassive black holes and will eventually merge into one giant black hole.

“Dancing Ghosts” – A New, Deeper Scan of the Sky Throws Up Big Surprises for Astronomers

How Astronomers Detected a Technosignature From Proxima Centauri — And Why They Rejected It