Gaia Detected an Entire Swarm of Black Holes Traveling Through The Milky Way : ScienceAlert
A fluffy cluster of stars spilling across the sky may have a secret hidden in its heart: a swarm of over 100 stellar-mass black holes. The star cluster in question is called Palomar 5. It’s a stellar stream that stretches out across 30,000 light-years, and is located around 80,000 light-years away. Such globular clusters are