The Milky Way’s supermassive black hole may have a dozen nomadic sibl

At the center of the Milky Way sits a dark and dangerous beast: Sagittarius A*. Located about 26,000 light-years from Earth, our galaxy’s only known supermassive black hole is roughly 4 million times as massive as the Sun, and its immense gravitational pull can nonchalantly annihilate any object that strays too close. Fortunately for us, Sagittarius A* is like a troll under a bridge — it does not leave its post.

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