Gravitational Waves

Once again, a decades-old theory of gravity has survived a modern scientific onslaught. Einstein wins again.

The historic neutron-star crash that astronomers observed last year generated a hypermassive, supermagnetic neutron star, a recent study suggests.

The collision of black holes harboring millions or billions of times the mass of the sun are likely common throughout the universe, a new study suggests.

Cataclysmic mergers of the superdense stellar corpses known as neutron stars may be common across the cosmos, a new study suggests.

So far, gravitational waves have found no hints of extra dimensions, but there may still be some really tiny ones lurking out there.

The dramatic neutron-star merger that astronomers observed in August 2017 generated a jet of material that seemed to move four times faster than light, a new study reports.

Close encounters with medium-size black holes can reanimate dead stars, if only momentarily, a new study suggests.

The first-ever observations of merging binary stars stunned the astronomy community last year, but not quite as much as the first-ever signal from extraterrestrial life might someday stun the world.

If music really is a universal language, we can use it to make some long-sought cosmic connections. That's the idea behind Intergalactic Omniphonics, a new art project that aims to catch E.T.'s ear.

A so-far unseen celestial collision could be astronomers' best bet for figuring out just how quickly the universe is expanding.

The discovery of a cosmic-ray source is a triumph of multimesssenger astronomy, in which scientists use multiple types of signals to probe deep cosmological questions.

As good skeptics, we shouldn't immediately believe general relativity's tangle of mathematics at first blush. Instead, we need evidence. Good evidence.

The echoes of colliding wormholes would look different than the signal from merging black holes.

The collision of two neutron stars whose gravitational waves were famously observed last August probably created a black hole, according to a new study.

Cascades of black hole collisions could lead to the formation of more-massive black holes.