Jonathan O’Callaghan

A recent gamma-ray burst known as the BOAT—“brightest of all time”—appears to have produced a high-energy particle that shouldn’t exist. For some, dark matter provides the explanation.

Groundbreaking results show that neutron stars of different masses may have the same size—upending astrophysical models.

A supernova-like explosion dubbed the Camel appears to be the result of a newborn black hole eating a star from the inside out.

Small black holes were nowhere to be found, leading astronomers to wonder if they didn’t exist at all. Now a series of findings, including a “unicorn” black hole, has raised hopes of solving the decade-long mystery.