Gaia Detected an Entire Swarm of Black Holes Traveling Through The Milky Way

Summary: Scientists used the Gaia space telescope to look at a group of stars called Palomar 5 and found something shocking. Hiding inside this cluster is a swarm of about 100 black holes. These black holes are packed so tightly together that their strong gravity is actually kicking stars out of the group. This "bullying" by the black holes creates a long stream of stars flowing into our Milky Way galaxy.

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