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Black holes of stellar mass form when massive stars collapse at the end of their life cycle. After a black hole has formed, it can grow by absorbing mass from its surroundings. Supermassive black holes of millions of solar masses (M ☉) may form by absorbing other stars and merging with other black holes, or via direct collapse of gas clouds.
A quasi-star (also called black hole star) is a hypothetical type of extremely large and luminous star that may have existed early in the history of the Universe. They are thought to have existed for around 7–10 million years due to their immense mass .
A hypothetical alternative to black holes. Q0957+561: Planck star: A star where the energy density is around the Planck density. The star will start to expand as soon as its density reaches the Planck constant. To the black hole, it expands instantly, but to the outside world, it takes eons to expand even the slightest. none: Population III star
A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a star. [1] They have masses ranging from about 5 to several tens of solar masses . [ 2 ] They are the remnants of supernova explosions, which may be observed as a type of gamma ray burst .
The black hole, in a galaxy some 4 billion light-years from Earth, likely has a mass at least 100 million times that of Earth's Sun. Astronomers reached this theory using data from the Hubble and ...
The radiation emitted by a dark star depends on its composition and structure; Hawking radiation, by the no-hair theorem, is generally thought of as depending only on the black hole's mass, charge, and angular momentum, although the black hole information paradox makes this controversial. Light-bending effects
It is the first star pair ever found near a supermassive black hole. Binary stars often appear as a single object in the night sky to the naked eye, but can often be detected with telescopes and ...
Direct collapse black hole: a black hole formed from the collapse of hydrogen, rather than from a star; Primordial black hole, a black hole that might have formed in a similar fashion to a star during the Universe's earliest epochs; Extremal black hole, the smallest possible black hole that could exist while rotating at a specific speed; White ...