Relativity

In the far future, we could reveal detailed views of distant worlds by turning our home star into a gravitational lens

Weighing in at seven times the mass of our sun, the dark object is by far the best-yet candidate for a free-floating stellar-mass black hole

Subtle signals from black hole mergers might confirm the existence of “Hawking radiation”—and gravitational-wave detectors may have already seen them

The atom interferometry technique uses the effects of time dilation to reveal subtle changes in gravity’s strength

Runaway success and underfunding have led to growing pains for the preprint server

The latest bounty of 35 events features oddball black holes and a miniature neutron star

Recent work has shown how “naked singularities” might defy the cosmic censorship conjecture

An answer to why we’ve not been visited from the future?

A curious signal of a potentially revolutionary new particle detected last year turned out to be a fluke

The successful technology demonstration paves the way for detecting mergers of supermassive black holes with future space-based observatories

The LIGO experiment has confirmed Albert Einstein’s prediction of ripples in spacetime and promises to open a new era of astrophysics

Quantum mechanics is not just about teeny particles. It applies to things of all sizes: birds, plants, maybe even people