White+Dwarfs+1A

A white dwarf is called the degenerate dwarf.It is mostly made of electrons-degenerate matter.( a type of generate matter in which the overlying materials force the weaker electrons into overeas that are in the lowest energy quantum state.) Even though white dwarfs have similar mass to the sun, and similar volume as the earth they are very dense. Their fate luminosity or glow comes from the emission or stored heat. The unusual faightness of the white dwarfs was just regonized by 3 scientists(Russell,Pickerug, and flemug in 1910. But the name "Whitedwarfs" was caused by William Luyten in 1922.White dwarfs are tohught to be the find state of all stars whose mass is not to hot to high/over 97% of the stars in the galaxy.) The material in a white dwarf no longer undergoes fusion reactions so the star has no source of energy. The dwarf is neither supported against gravitational collapse. It is only supported by electron degeneracy pressure hilts why its extremely dense. A white dwarf is very hot when formed, but since it has no energy source it will gradually radiate away and cool down. Due to its radiation the temperture will lesson and got red in time. Over a period of time a white dwarf will cool to temps that no longer visible making them a black dwarf. But since no white dwarf can be older than the age of universe(app. 13.7 billion years.) No black dwarfs are thought to exist yet. a white dwarf is a what star like our sun become after they have exhausted their nuclear fule.Near the end of its nuclear stage such as a r expels must of its outer material, creating a planetary nebula. Only the hot core of the sun remains ( T.100,000k). An earth size while dwarf has a density of 1x10^9 kg/m3. In comparison earth itself has a dense of 5.4x10^3/kg/m3 which means a white dwarf is 200,000 times as dense.In a all around the white dwarf is one on the best stars.