Black holes differ in mass and spin

Black holes are spinning faster than expected, researchers find
There's a universe full of black holes out there, spinning merrily away—some fast, others more slowly. A recent survey of supermassive black holes reveals that their spin rates reveal something about their formation history.
Supermassive Black Hole Caught Doing Something Never Seen Before
Sgr A*, at the heart of the Milky Way and clocking in at 4.3 million solar masses, is the closest supermassive black hole we have access to. It's also on the quiescent end of the activity scale, which means we have a front row seat to small-scale black hole behavior that would be too faint to see were it taking place in another galaxy.
Feeding supermassive black holes are more common than thought across the universe
"If our eyes were able to detect X-rays, the sky would be full of dots. And every single one of those dots would be an accreting supermassive black hole."
New research suggests more supermassive black holes than we ever knew
Researchers have found there are many more black holes in the universe than once thought. (Credit: WikiMedia Commons) Most picture the night sky as an endless sea of twinkling stars. But if your eyes
Black holes differ in mass and spin: May have formed in different ways
Gravitational wave observations have revolutionized our understanding of black holes, revealing crucial details about their masses and spins. These measurements, collected from binary black hole mergers,
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Astronomers find hundreds of 'hidden' black holes — and there may be billions or even trillions more
Black holes that have been obscured by clouds of dust still emit infrared light, enabling astronomers to spot them for the ...
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Gravitational waves offer a 'cosmic DNA test' for black holes
The size and spin of black holes can reveal how and where they were born, and gravitational waves offer a way to decode this ...
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James Webb telescope captures 1st 'mid-infrared' flare from Milky Way's supermassive black hole
The James Webb Space Telescope has captured a mid-infrared picture of Sagittarius A*, filling in a long-standing gap in ...
A strange black hole is acting even stranger
A strange black hole is making scientists scratch their heads.
Mysterious Pulsing X-Rays From a Nearby Black Hole Baffle Astronomers
MIT astronomers have been captivated by the strange behaviors of a supermassive black located 270 million light-years away, ...
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James Webb Space Telescope sees little red dots feeding black holes: 'This is how you solve a universe-breaking problem'
"This is how you solve the universe-breaking problem." ...
Want to Get Sucked Into a Black Hole? Try This Book.
Marcus Chown’s “A Crack in Everything” is a journey through space and time with the people studying one of the most enigmatic objects in the universe.
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This Supermassive Black Hole May Harbor a Bizarre Star That Refuses to Die
Strange x-ray pulses hint at a surprisingly long-lived white dwarf orbiting precariously close to a supermassive black hole ...