Markarian 590 contains an active galactic nucleus with a supermassive black hole, and the region around the black hole has strangely changed in brightness a couple of times in the past 50 years.
George's Random Astronomical Object
Miscellaneous
Markarian 590 contains an active galactic nucleus with a supermassive black hole, and the region around the black hole has strangely changed in brightness a couple of times in the past 50 years.