According to present observations,how does the Milky Way's black hole compare to those at the center of powerful active galactic nuclei?

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Present observations suggest that the Milky Way's black hole is relatively small, with a mass of only about 4 million times that of the Sun. In contrast, the centers of powerful active galactic nuclei can have black holes that are billions of times more massive than the Sun. Therefore, the Milky Way's black hole is much less massive than those at the center of powerful active galactic nuclei.

According to Present Observations,how Does the Milky Way's Black Hole