'The mass ratio is absolutely huge.'
The more the gravitational pull, the faster the stars move. Their faster movement is believed to be an indication of higher concentrations of dark matter, the mysterious substance that many scientists think makes up the bulk of mass in the universe.
"You have a very small galaxy that is falling into the Milky Way, and its black hole is about as massive as the Milky Way’s," Gebhardt said. "The mass ratio is absolutely huge. The Milky Way is dominant; the Leo I black hole is almost comparable."
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