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"Proof of the black hole is a tremendous amount of mass inside a very small volume. There's 4 million times the mass of our sun within a region that's comparable to the size of our solar system."

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About Andrea M. Ghez

Andrea M. Ghez is an American astronomer and professor at UCLA. She was awarded the 2020 Nobel Prize in Physics for discoveries about the supermassive compact object at the center of the Milky Way.

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