Astrophysicists from the LIGO-Virgo-KAGRA Collaboration have detected a further 35 gravitational waves since the last catalog release in October 2020,...
Since the first observation of merging black holes in 2015, astrophysicists have been repeatedly surprised by their large masses. They originally expected...
Variations in the brightness of light seen from around a stellar-mass black hole in the binary system MAXI J1820+070 were caused by a huge warp in its...
Astronomers using NASA’s Chandra X-ray Observatory and Neil Gehrels Swift Observatory have detected a set of eight X-ray rings around a low-mass black...
While most of the binary black-hole mergers recently detected by NSF’s Laser Interferometer Gravitational-Wave Observatory (LIGO) in the United States...
Palomar 5 is one of the sparsest star clusters in the halo of our Milky Way Galaxy and is best known for its spectacular tidal tails, spanning over 20...
The newly-discovered stellar-mass black hole candidate is a binary companion to a nearby red giant called V723 Mon.
An artist’s impression of the V723...
A black hole in the Cygnus X-1 binary system is so massive that it challenges current stellar evolution models.
An artist’s impression of the Cygnus...
Astronomers using the NASA/ESA Hubble Space Telescope have found evidence for dozens of stellar-mass black holes lurking in the core-collapsed, globular...
Astronomers using NASA’s Chandra X-ray Observatory have detected an extragalactic candidate planet circling a binary system in Messier 51 (also known...
An analysis of archival X-ray data from NASA’s Rossi X-Ray Timing Explorer has revealed a clear separation between the characteristics of stellar-mass...
Astronomers using the twin LIGO detectors located in Livingston, Louisiana, and Hanford, Washington, and the Virgo detector located near Pisa, Italy, have...
The gravitational-wave signal GW190814, detected on August 14, 2019 by NSF’s Laser Interferometer Gravitational-Wave Observatory (LIGO) and the Virgo...
Astronomers using NASA’s Chandra X-ray Observatory have observed a pair of relativistic jets blasting away from a black hole in the binary system MAXI...
Astronomers using the Fiber-fed Extended Range Optical Spectrograph (FEROS) on the MPG/ESO 2.2-m telescope at ESO’s La Silla Observatory have found a...
In a paper published in the Astrophysical Journal, a team of astronomers in Italy proposes that heavy seeds of supermassive black holes formed via the...
An international team of astronomers has discovered an exceptionally massive black hole of stellar origin with a mass 68 times that of the Sun.
An artist’s...
In a paper published in the November 1, 2019 issue of the journal Science, a team of astronomers offers a new way to search for stellar-mass black holes,...
V404 Cygni is a binary system comprising a black hole and a star orbiting one another. It lies in the constellation Cygnus at a distance of about 7,800...
