A giant black hole in a small satellite galaxy defies explanation

A small galaxy orbiting the outskirts of the Milky Way appears to have a giant black hole at its center, comparable to the Milky Way itself, and scientists don’t know why.

Leo I’s dwarf galaxy, about 820,000 light -years from EarthIts width is only about 2,000 light years. Until now, astronomers thought the galaxy’s mass was about 15 to 30 million times the mass of our sun. It’s small compared to Bima Sakti, which is estimated to weigh as much as 1.5 trillion suns and have a disk width of more than 100,000 light years.

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