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.
Though our solar system and the movement of its planets appear relatively sedate, there are many things that could upset the balance. Anything with enough mass that got close enough could disrupt planetary orbits. This includes ...
Astronomy
Jul 14, 2025
2
60
The LIGO-Virgo-KAGRA (LVK) Collaboration has detected the merger of the most massive black holes ever observed with gravitational waves using the LIGO observatories. The powerful merger produced a final black hole approximately ...
Astronomy
Jul 13, 2025
0
241
With the recent first light milestone for the Vera Rubin Observatory, it's only a matter of time before one of astronomy's most long-awaited surveys begins. The Legacy Survey of Space and Time (LSST) is set to start on November ...
Astronomy
Jul 9, 2025
0
249
Astronomers have studied the globular cluster 47 Tucanae extensively, but still have many questions. It may have an intermediate mass black hole in its center like Omega Centauri is expected to have. There are reasons to ...
Astronomy
Jul 8, 2025
0
133
The search for dark matter requires all the best models, theories, and ideas we can throw at it. A new paper by Julia Monika Koulen, Stefano Profumo, and Nolan Smyth from the University of California at Santa Cruz (UCSC) ...
Astronomy
Jul 7, 2025
0
102
Scientists may have found a new way to detect some of the universe's most mysterious objects, primordial black holes (PBHs), using Hawking radiation. This groundbreaking approach relies upon watching for their radiation signatures ...
Astronomy
Jun 27, 2025
1
126
One of the most perplexing discoveries in modern astronomy has been finding supermassive black holes, some weighing billions of times more than our sun, in galaxies that formed less than 750 million years after the Big Bang. ...
Astronomy
Jun 27, 2025
2
102
We know black hole mergers occur because we can detect the resulting gravitational waves. But when trying to piece together the history of black hole mergers in the Milky Way, astronomers need another tactic. They need to ...
Astronomy
Jun 26, 2025
0
105
In a recently published paper in Physical Review Letters, scientists propose a comprehensive theoretical framework indicating that gravitational wave signals from black hole mergers are more complex than earlier anticipated.
A new University of Leicester study shows how the uncontrolled growth of a distant supermassive black hole (SMBH) is revealed by the ejection of excess matter as a high velocity wind.
Astronomy
Jun 17, 2025
0
85
