Black holes

The astrophysicist Andrea Ghez spent two decades proving that a supermassive black hole anchors the center of the Milky Way galaxy. Her new plan? Test what happens when things get too close.

The team that discovered gravitational waves put their data online. Now an independent group of researchers claims that they’ve found what might be a serious problem.

Recent calculations tie together two conjectures about gravity, potentially revealing new truths about its elusive quantum nature.

The Advanced Laser Interferometer Gravitational-Wave Observatory’s third detection further compounds the mystery of why black holes collide.

A series of observations at the very edge of the universe has reignited a debate over what lifted the primordial cosmic fog.

As physicists extend the 19th-century laws of thermodynamics to the quantum realm, they’re rewriting the relationships among energy, entropy and information.

A decades-old method called the “bootstrap” is enabling new discoveries about the geometry underlying all quantum theories.

Can a fluid analogue of a black hole point physicists toward the theory of quantum gravity, or is it a red herring?

How do scientists react to major breaking science news? For astrophysicists after the big gravitational waves announcement, it was meeting for two weeks in Santa Barbara, California.