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These black holes could be the seeds of the supermassive black holes found in the centres of most galaxies. [128] It has further been suggested that massive black holes with typical masses of ~10 5 M ☉ could have formed from the direct collapse of gas clouds in the young universe. [124]
John Michell (/ ˈ m ɪ tʃ əl /; 25 December 1724 – 21 April 1793) was an English natural philosopher and clergyman who provided pioneering insights into a wide range of scientific fields including astronomy, geology, optics, and gravitation.
Wheeler and Edwin F. Taylor wrote Spacetime Physics (1966) and Scouting Black Holes (1996). Alluding to Wheeler's "mass without mass", the festschrift honoring his 60th birthday was titled Magic Without Magic: John Archibald Wheeler: A Collection of Essays in Honor of his Sixtieth Birthday (1972). His writing style could also attract parodies ...
Scientists have discovered the oldest black hole yet, a cosmic beast formed a mere 470 million years after the Big Bang. ... With X-rays "you’re actually capturing the gas that is being ...
UCLA astronomer Andrea Ghez explains the remarkable photo of Sagittarius A*, the black hole at the center of the Milky Way.
Astronomers say they have discovered the longest pair of black hole jets ever seen in the sky coming from a galaxy far, far away. The record-breaking eruptions span 23 million light years from end ...
1972 — Jacob Bekenstein suggests that black holes have an entropy proportional to their surface area due to information loss effects; 1974 — Stephen Hawking applies quantum field theory to black hole spacetimes and shows that black holes will radiate particles with a black-body spectrum which can cause black hole evaporation
Cygnus X-1 (abbreviated Cyg X-1) [11] is a galactic X-ray source in the constellation Cygnus and was the first such source widely accepted to be a black hole. [12] [13] It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources detectable from Earth, producing a peak X-ray flux density of 2.3 × 10 −23 W/(m 2 ⋅Hz) (2.3 × 10 3 jansky).