Question

what is white dwarf?

Answer 1

When a comparitevely small star, about the size of sun converts all it's hydrogen to helium and helium to carbon and oxygen( if it is big enough to create pressure enough to fuse He into C and O) the gravitational force is not countered by the outward force therefore, the star collapses, but still has a high temperature and it rotates at high speeds. This is called the 'death' of the star and the star is known as a white dwarf.

Answer 2

Hey there!!

A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth. A white dwarf's faint luminosity comes from the emission of stored thermal energy; no fusion takes place in a white dwarf wherein mass is converted to energy. The nearest known white dwarf is Sirius B, at 8.6 light years, the smaller component of the Sirius binary star. There are currently thought to be eight white dwarfs among the hundred star systems nearest the Sun.The unusual faintness of white dwarfs was first recognized in 1910.The name white dwarf was coined by Willem Luyten in 1922.

Hope it helps