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.
Gravitational waves are ripples in space-time created by the interaction of massive objects in space, such as black holes and neutron stars. Their existence was first predicted by Albert Einstein in his 1916 paper describing his theory of general relativity. In 2015, scientists made the first detection of gravitational waves, observing ripples from the collision of two black holes. The discovery won astrophysicists Kip Thorne, Barry Baris and Rainer Weiss the 2017 Nobel Prize for Physics. Subsequent observations have also detected gravitational waves from colliding neutron stars. Learn more about gravitational waves here.
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 collision of two neutron stars whose gravitational waves were famously observed last August probably created a black hole, according to a new study.
A gravitational wave detector that's 2.5 miles long isn't cool. You know what's cool? A 25-mile-long gravitational wave detector.
Black holes in the centers of galaxies could accelerate mergers between objects and produce more ripples in space-time, also known as gravitational waves, a new study suggests.
A new software program that uses artificial intelligence can help rapidly detect and analyze gravitational waves, or ripples in the cosmic fabric of space-time, a new study finds.
The Xinjiang Qitai 110-meter Radio Telescope — QTT, for short — could help advance research on dark matter, gravitational waves, and extraterrestrial intelligence.
The discovery of gravitational waves last year sent ripples through the entire field of physics. It also ushered in a new era of astronomy.
For the first time, astronomers have detected evidence of a cocoon of material blasting out from a pair of merging neutron stars.
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