Two sources tens of millions of light-years away have sent puzzling X-ray flares blazing our way. Now astronomers think they might have the answer: intermediate-mass black holes.
New observations solve a 30-year-old puzzle of mysterious signals from around black holes.
The gravitational wave observatory has detected a second event, heralding a new era in astrophysics. The day after Christmas last year, the cosmos quietly gifted scientists with gravitational waves — ripples in the fabric of spacetime – produced in a collision between two stellar-mass black holes. It’s the second event detected by physicists working with…
Astronomers have detected three cold gas clumps falling toward a galaxy's center — at odds with the prevailing idea for how black holes grow.
A galaxy in the midst of a merger isn’t forming stars, even though it could. Astronomers think the galaxy’s central black hole might be the reason why.
NASA’s Fermi Gamma-ray Space Telescope might have detected a burst from the same merging black holes that emitted the gravitational waves LIGO detected.
Astronomers have measured the spin of one of the universe's most massive black holes — and provided evidence that the behemoth has a companion.
LIGO scientists have announced the direct detection of gravitational waves, a discovery that won't just open a new window on the cosmos — it'll smash the door wide open.
When a quasar, a black hole-fueled beacons that shines from across the cosmos, went dark, astronomers set out to find out why.
Black holes may have a limit to how much they can eat in the public eye.
Gossip is racing around the physics and astronomy community: has LIGO finally heard its first black-hole merger? Here’s the reality.
Astronomers have detected magnetic fields writhing around the Milky Way's central black hole.
Astronomers have spotted what appears to be a regular signal coming from the blazar PG 1553+113.
X-ray observations suggest that flares happen when a black hole's "atmosphere" contracts and launches away from it.
The last hurrah of a star wrenched apart by a supermassive black hole tells astronomers what the stellar crumbs are doing.
The answer is a tantalizing maybe. Astronomers are investigating whether an increase in the number of flares from Sgr A* are due to the recent close passage of a dusty object known as G2.
Astronomers think a bright X-ray source in the galaxy NGC 1313 is a mid-size black hole.
Astronomers are investigating a new technique for finding close pairs of supermassive black holes, and they might have found one in the nearest quasar.
Astronomers have confirmed that the quasar PG 1302-102 is probably a binary supermassive black hole, its members less than a tenth of a light-year apart.
Astronomers have identified the smallest supermassive black hole ever detected in a galaxy’s center.
On June 15th a quiet black hole, V404 Cygni, suddenly flared for the first time since 1989.
The NuSTAR telescope has spied high-energy X-rays from five supermassive black holes shrouded in a thick veil of dust and gas, a test run that will lead to a better census of these hidden beasts.
A supermassive black hole in the early universe is at least 10 times too heavy for its host galaxy, raising questions about galaxy and black hole coevolution.
Combining a novel technique and a world-class telescope, astronomers have measured the mass of the supermassive black hole at the center of barred spiral NGC 1097.
Researchers using NASA’s Wide-Field Infrared Survey Explorer (WISE) have discovered the most luminous galaxy to date.