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Sagittarius A*, abbreviated as Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SADGE-AY-star [3]), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way.Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [7] visually close to the Butterfly Cluster (M6) and Lambda Scorpii.
A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (e.g. light) can escape it. [2] Albert Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. [3] [4] The boundary of no escape is called the event horizon.
The Black Hole is a 1979 American science fiction film directed by Gary Nelson and produced by Walt Disney Productions.The film stars Maximilian Schell, Robert Forster, Joseph Bottoms, Yvette Mimieux, Anthony Perkins and Ernest Borgnine, while the voices of the main robot characters are provided by Roddy McDowall and Slim Pickens (both uncredited).
In 2008, while working at CERN, [1] [2] [3] McAlpine wrote, produced and performed in the YouTube video "Large Hadron Rap" under the pseudonym "alpinekat". As of September 2018, the video has been viewed over 8 million times. [4] McAlpine has contributed articles to publications including New Scientist, ScienceNow, Physics World and Chemistry ...
The resulting visual effects provided Thorne with new insight into the gravitational lensing and accretion disks surrounding black holes, resulting in the publication of three scientific papers. [65] [66] [67] The first image of the event horizon of a black hole, obtained by the Event Horizon Telescope in 2019. The asymmetric brightness of the ...
Rare X-ray outburst from a stellar-mass black hole in the binary system V404 Cygni. Video on YouTube. The system was first noted as Nova Cygni 1938 and given the variable star designation V404 Cygni. It was considered to be an ordinary "moderately fast" nova although large fluctuations were noted during the decline.
Gaia BH3 is the first black hole discovered from preliminary Gaia DR4 astrometric data. [2] The black hole and star orbit the system barycentre every 11.6 years, with an orbital distance ranging from 4.5–29 AU. [3] The black hole's mass is 32.70 M ☉, the heaviest known stellar black hole in the Milky Way.
The Black Hole Initiative (BHI) is an interdisciplinary center at Harvard University that includes the fields of astronomy, physics, and philosophy, and is claimed to be the first center in the world to focus on the study of black holes.