essentially the exposed core of a star that has died and shed its outer layers in a planetary nebula.
Electron Degeneracy Pressure
A type of pressure that arises when subatomic particles are packed as closely as the laws of quantum mechanics allow. The degeneracy pressure in white dwarfs arises from closely packed electrons.
The rapidly rotating disk
The process in which material falls onto another body
White Dwarf Supernova
The white dwarf explosion. A super nova that occurs when an according white dwarf reaches the white-dwarf limit, ignites runaway carbon fusion, and explodes like a bomb.
Is the ball of neutrons created by the collapse of the iron core in a massive star supernova.
Neutron Degeneracy Pressure
Degeneracy pressure exerted by neutrons as in neutron stars.
A neutron star from which we see rapid pulses of radiation as it rotates.
A binary star system that emits substantial amounts of X-rays, thought to be from an accretion disk around a neutron star or a black hole.
Bursts of X rays coming from sudden ignition of fusion on the surface of an accreting neutron star in an X-ray binary system
An object that emits a burst of X rays every few hours to every few days; each burst lasts a few seconds and is thought to be caused by helium fusion on the surface of an accreting neutron star in a binary system.
The boundary between the inside of a black hole and the universe outside
Space and time are not distinct, as we usually think of them, but instead are bound up together as four-dimensional space time
The radius of the event horizon
The place at the center of a black hole where, in principle, gravity crushes all matter to an infinitely tiny and dense point
A sudden burst of gamma rats from deep space; such bursts apparently come from distant galaxies, but their precise mechanism is unknown
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