The One Kind of Black Hole Astronomers Can't Pin Down
Scientists believe these light-eating bodies come in three sizes, but they haven’t yet confirmed that “medium” truly exists.
When it comes to size, nearly all the known black holes in the universe fall into two categories: They’re big, or they’re really, really big. Stellar mass black holes weigh up to a few dozen times the mass of our sun, and supermassive black holes can weigh millions or billions times the mass of the sun.
But astronomers have for decades suspected the existence of something in between, intermediate-mass black
