Near the center of the Milky Way Galaxy sits an immense object that astronomers call Sagittarius A*. This “supermassive” black hole may have grown in tandem with our galaxy, and it’s not alone. Scientists suspect that similar behemoths lurk at the heart of almost all large galaxies in the cosmos.
Some can get really big, said Joseph Simon, postdoctoral researcher in the Department of Astrophysical and Planetary Science at the University of Colorado Boulder.
“The black hole at the center of our galaxy is millions of times the mass of the sun, but we also see others that we think are billions of times the mass of the sun,” he said.
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