Astronomical black holes are compact astrophysical systems characterized by regions of spacetime where gravity is so strong that no matter or radiation can escape beyond the event horizon. They are described by solutions to Einstein’s field equations, typically approximated by the Kerr or Schwarzschild metrics, and are defined by mass, spin, and (negligible) charge. Formed primarily via stellar core collapse or hierarchical mergers, they interact with their environments through accretion disks, relativistic jets, and gravitational-wave emission. Astronomical black holes span stellar-mass to supermassive regimes, influencing galactic dynamics, high-energy radiation processes, and cosmological structure formation.
In a new Physical Review Letters study, researchers have successfully followed a gravitational wave's complete journey from the infinite past to the infinite future as it encounters a black hole.
NTNU researchers may have found the answer to one of the big, unanswered questions in physics. The universe is full of different types of radiation and particles that can be observed here on Earth. This includes photons across ...
Astronomy
May 22, 2025
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When people think of black holes, they imagine something dramatic: a star exploding in space, collapsing in on itself, and forming a cosmic monster that eats everything around it. But what if black holes didn't always begin ...
When the JWST came to life and began observations, one of its first jobs was to gaze back in time at the early universe. The Assembly of Galaxies is one of the space telescope's four main science themes, and when it observed ...
Astronomy
May 19, 2025
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Researchers have discovered that ultra-fast wind surrounding a supermassive black hole is not smooth and continuous as previously assumed, but instead resembles a rapid-fire stream of gas "bullets."
Astronomy
May 15, 2025
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A study published in Nature has established a new benchmark in modeling the universe's most extreme events: the collisions of black holes and neutron stars. This research, led by Professor Jan Plefka at Humboldt University ...
Astronomy
May 14, 2025
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Quasars represent some of the most luminous and energetic phenomena in the universe. These distant powerhouses are driven by supermassive black holes—colossal gravitational engines with masses millions to billions of times ...
Astronomy
May 9, 2025
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NASA has released three new pieces of cosmic sound that are associated with the densest and darkest members of our universe: black holes. These scientific productions are sonifications—or translations into sound—of data collected ...
Astronomy
May 8, 2025
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Like a scene out of a sci-fi movie, astronomers using NASA telescopes have found "Space Jaws." Lurking 600 million light-years away, within the inky black depths between stars, there is an invisible monster gulping down any ...
Astronomy
May 8, 2025
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There is a supermassive black hole at the center of our galaxy, and it's not alone. There is also likely a forest of binary black holes, neutron stars, and white dwarfs. All of these emit gravitational waves as they gradually ...
Astronomy
May 8, 2025
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