The Three Possible Endings of a Star's Life by bahaa

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The Three Possible Endings of a Star's Life

Published on Apr 29, 2018

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The Three Possible Endings of a Star's Life

White Dwarfs, Neutron Stars, or Black Holes

White Dwarfs
White dwarfs are the core remnants of the original star and consist mainly of electron-degenerate matter. White dwarfs are very faint because they only radiate stored thermal energy.

White dwarfs are the end states for most stars, from those with very low masses to those with moderately high masses. White dwarfs would eventually decay over trillions of years and become black dwarfs.

Neutron Stars
Neutron stars are bizarre, incredibly dense celestial objects composed of closely packed neutrons. Neutron stars and black holes are doors that lead from very similar places, only that stars that form black holes are bit more massive than those that form neutrons stars.

Neutron stars form by the gravitational collapse of a star's remnant during its supernova process. To conserve angular momentum, neutron stars spin very fast and are hypothesized to be very strong sources of gravitational waves.

Black Holes
Black holes are regions of spacetime where the gravitational effects exhibited result in nothing - not even electromagnetic radiation - being able to escape from its event horizon. The event horizon of the black hole, as described by General Relativity, is the encompassing shell of the singularity within.

Photo by thebadastronomer

Black holes have very incredible properties that are represented through their mathematical representations. For example, using the Penrose diagram, it can be shown that space acts like time in a black hole while time acts like space. Furthermore, the representations of naked singularities are very intriguing aspects of the infinities within general relativity and its solutions. Also, the representations of spinning black holes through the Kerr metric also provide intriguing aspects of the nature of energy and spacetime. Hawking radiation and the Unruh effect are also an aspects of black holes that continues intrigue scientists and prompt more exploration.

Black holes form from the collapse of an incredibly massive star into a volume where current understanding of physics puts nothing in its way from collapsing to an infinitesimal size. The outer volume of the black hole is just the event horizon which is just the representation of the black hole.

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