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4 days ago · A black hole is a region of spacetime where gravity is so strong that nothing, not even light, can escape it. Learn about the history of the concept, the theory of general relativity that predicts it, and the different types of black holes based on their mass and origin.
2 days ago · According to Hawking’s theory, numerous tiny primordial black holes, possibly with a mass equal to or less than that of an asteroid, might have been created during the big bang, a state of extremely high temperatures and density in which the universe originated 13.8 billion years ago.
- The Editors of Encyclopaedia Britannica
- A black hole is a cosmic body of extremely intense gravity from which even light cannot escape. Black holes usually cannot be observed directly, bu...
- The singularity constitutes the center of a black hole, hidden by the object’s “surface,” the event horizon. Inside the event horizon, the escape v...
- A black hole can be formed by the death of a massive star. At the end of a massive star's life, the core becomes unstable and collapses in upon its...
- One example of a black hole is can be found in Cygnus X-1, a binary X-ray system consisting of a blue supergiant and an invisible companion 14.8 ti...
5 days ago · Hubble has played a key role in deciphering the ongoing puzzle of black holes. A black hole-powered jet of electrons and other particles traveling at nearly the speed of light blasts from the core of elliptical galaxy M87. The jet originates in the disk of superheated gas swirling around the galaxy's supermassive black hole.
5 days ago · A black hole formula worked out in the 1970s remains the most concrete clue physicists have about the threads of the space-time fabric. Kristina Armitage/ Quanta Magazine. arl Schwarzschild first stumbled upon black holes in 1916, but for a long time they weren’t really a thing. “Black holes were discovered as a purely geometric object ...
4 days ago · JAXA’s XRISM X-ray telescope captured the distribution of matter falling into the supermassive black hole in galaxy NGC 4151 over a wide radius, spanning from 0.001 to 0.1 light-years. By determining the speed of the iron atoms from their X-ray signature, scientists have mapped out a sequence of structures surrounding the central ‘monster ...
3 days ago · Approach a black hole, most particularly such a supermassive black hole (as viewed from such a distance), and you approach an accelerating vector expansion of space and time universe (u ...
3 days ago · The black hole is 6.5 billion times more massive than the Sun. This picture was the first direct visual evidence of a supermassive black hole and its shadow. The ring is brighter on one side because the black hole is rotating, and thus material on the side of the black hole turning toward Earth has its emission boosted by the Doppler effect.
