The sun's corona is 200 times hotter than its surface, defying models of stellar bodies. Now, this 80-year-old puzzle may finally have a solution.
Superfast changes to the intensity of a jet blasting out from a small black hole have been detected for the first time.
Astronomers reveal 'the final chapters of a star's life' in a stunning James Webb Space Telescope's image of the exploding Ring Nebula.
NASA has identified a supermassive black hole blasting its energetic jets straight toward Earth. Don't worry, though, this blazar is located 400 million light-years away.
A massive galaxy far from Earth seems to be entirely devoid of dark matter, contrary to all accepted cosmological models.
Ghostly nebulas created by exploding stars appear to align in the Milky Way's bulging center. Astronomers may finally know why.
Three early galaxies discovered by the James Webb Space Telescope could actually be titanic stars powered by a dark matter heart.
A supernova that erupted when a massive star died could have destroyed our infant solar system — if it weren't protected by a cocoon of molecular gas.
Astronomers using the James Webb Space Telescope have discovered a feeding supermassive black hole from when the universe was less than 600 million years old.
Observing time distortions could show whether Einstein's theory of general relativity accounts for the mysteries of dark matter and dark energy.
New research looking at the cosmological constant problem suggests the expansion of the universe could be an illusion.
A new analysis of the Jupiter-sized exoplanet WASP-76 b reveals that the world is carrying the remains of its long-lost neighbor in its atmosphere.
The enormous gamma-ray burst, called the Brightest Of All Time (or BOAT), may be powered by its strange jet structure, scientists say.
A new study questions if our planet could capture rocky and icy visitors from outside the solar system — and how scientists could spot them.
A newly discovered supernova can be watched as it develops in real-time online and for free. The livestream will begin at 6:30 p.m. EDT (2230 GMT) on Friday, May 26.
Quasars, the most extreme phenomena in the universe, are triggered when galactic collisions deliver gas to feeding black holes, new research suggests.
Scientists have synthesized a previously unknown isotope of uranium, uranium-241, that may start to disappear after just 40 minutes.
Powerful bursts of radiation called fast radio bursts could be launched when neutron stars collide and merge, gravitational wave detections indicate.
A bizarre object called "the Cow" is the flattest explosion ever detected, and the first example of a rare phenomenon called a fast blue optical transient (FBOT).
The 'Hawking radiation' emitted by black holes may be able to carry information after all, a new solution to Stephen Hawking's famous paradox suggests.
Scientists watched as two stars slowed in their orbits around black holes, concluding it was the result of "drag" generated by dark matter.
Scientists watched as a three-quasar system merged in a supercomputer simulation of the universe to birth a black hole 300 billion times as massive as the sun.
Astronomers have discovered a "runaway" black hole, potentially the first observational evidence that supermassive black holes can be ejected from their host galaxies.
A ring looping around the icy dwarf planet Quaoar is located much farther from its parent body than scientists thought was possible.
A metallic alloy of chromium, cobalt, and nickel is over 100 times tougher than graphene and gets even more resistant to damage at extremely low temperatures.