We can estimate the mass of the central black hole in the Milky Way by measuring the orbital speeds of stars near it.

Name: We can estimate the mass of the central black hole in the Milky Way by measuring the orbital speeds of stars near it.
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Quizplus · Accepted Answer

This is true. By observing the orbits of stars and gas clouds near the center of the Milky Way galaxy, scientists have been able to estimate the mass of the central black hole to be about 4 million times the mass of our sun.

We Can Estimate the Mass of the Central Black Hole