Science ❯ Astrophysics ❯ Cosmology

Black Hole Formation

Massive Black Holes Massive Stars Direct Collapse Binary Black Holes Hierarchical Mergers

Twin Black-Hole Mergers Display Extreme Spins, Strengthen Einstein’s Theory, and Point to Second-Generation Origins

Peer-reviewed analyses turn two late-2024 gravitational-wave detections into some of the sharpest tests of general relativity to date.

Record-Breaking 225-Solar-Mass Black Hole Merger Challenges Formation Models