Black Holes and the Earth from Space

Describe how black holes are believed to form. Assess the various tools and techniques that are used to study and observe black holes, as well as the ranges of the electromagnetic spectrum that are best suited for these studies

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...n suns combined and would fit inside a ball with a diameter about the size of the solar system. Scientific evidence suggests that every large galaxy contains a supermassive black hole at its center."

Origins

How do they form? Essentially, they are products of dying stars. The Hubblesite (2014), explain, "A star with a mass greater than about 20 times the mass of our Sun may produce a black hole at the end of its life...When a very massive star exhausts its nuclear fuel it explodes as a supernova. The outer parts of the star are expelled violently into space, while the core completely collapses under its own weight. If the core remaining after the supernova is very massive (more than 2.5 times the mass of the Sun), no known repulsive force inside a star can push back hard enough to prevent gravity from completely collapsing the core into a black hole..the core compacts into a mathematical point with virtually zero volume, where it is said to have infinite ...