how are nebulaes and black holes formed?
Answers
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Answer:
At a critical point, the core implodes in what is called a supernova, which blows the star's outer shell into space. If the matter left over after the supernova has a mass of three times or more that of the sun, nothing can stop gravity from collapsing into a point with infinite mass. This point is a black hole.
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Answer:
Black holes : A black hole is a region in space where the pulling force of gravity is so strong that light is not able to escape.
Primordial black holes are thought to have formed in the early universe, soon after the big bang.
Stellar black holes form when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space.
Scientists think super massive black holes formed at the same time as the galaxy they are in. The size of the super massive black hole is related to the size and mass of the galaxy it is in.
Nebula : A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova.
In essence, a nebula is formed when portions of the interstellar medium undergo gravitational collapse. Mutual gravitational attraction causes matter to clump together, forming regions of greater and greater density. From this, stars may form in the center of the collapsing material, who’s ultraviolet ionizing radiation causes the surrounding gas to become visible at optical wave lengths.