What are black holes?
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A region in space having very high gravity which pulls every matter.
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A black hole is a celestial object so compact that the intensity of its gravitational field prevents any form of matter or radiation from escaping. Such objects can neither emit nor diffuse light and are therefore black, which in astronomy amounts to saying that they are invisible. However, several techniques of indirect observation in different wavelengths have been developed and allow to study the phenomena that they induce. In particular, matter caught in a black hole is heated at considerable temperatures before being "engulfed" and emits a significant amount of X-rays. Considered as early as the eighteenth century, within the framework of classical mechanics, their existence - predicted By general relativity - is a certainty for almost all astrophysicists and theoretical physicists. Gravitation being the only effect that can emerge from a black hole, a quasi-direct observation of black holes could be detailed in February 2016 through the first direct observation of gravitational waves.
Within the framework of general relativity, a black hole is defined as a gravitational singularity hidden by an absolute horizon called the horizon of events. According to quantum physics, a black hole is likely to evaporate through the emission of a black body radiation called Hawking radiation.
A black hole should not be confused with a white hole or a wormhole.
Within the framework of general relativity, a black hole is defined as a gravitational singularity hidden by an absolute horizon called the horizon of events. According to quantum physics, a black hole is likely to evaporate through the emission of a black body radiation called Hawking radiation.
A black hole should not be confused with a white hole or a wormhole.
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