Science ❯ Astrophysics ❯ Cosmology

Cosmic Events

Black Hole Mergers Black Hole Formation Fast X-Ray Transients Neutron Star Collisions Black Hole Collisions InterPlanetary Network Kilonovae Gamma Ray Bursts

Peer-Reviewed LIGO–Virgo–KAGRA Study Points to Second-Generation Black Holes in Two 2024 Mergers

High spins with asymmetric masses enabled precision tests of general relativity, yielding new limits on ultralight bosons.

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Record-Setting Day-Long GRB 250702B Confirmed at z = 1.036 as Origin Remains Unsettled