black , white, brown drawfs?

Question

who , what , where , when and why

size and color

Answer 1

Red dwarfs are the smallest, coolest, and dimmest class of normal stars. They can burn for possibly as long as a trillion years, because they burn so slowly. Brown dwarfs are very small stars (smaller than red dwarfs) that can fuse only deuterium. They range in mass from 12 to 70 times the mass of Jupiter, though they're similar in size. They burn dimly for a million years or so and then slowly cool. White dwarfs are old medium-sized stars whose fusion reactions have gone out. They are tiny, extremely dense, and very hot to begin with. Our Sun will become a white dwarf in another six billion years or so. Black dwarfs are white dwarfs that have cooled to the point where they no longer visibly glow. This takes such a long time that it is thought there are no black dwarfs in the universe yet.

Answer 2

Black holes - the end result of the collapse of massive stars (more than 8 solar masses) - gravity is so strong that light can't escape.

White dwarf:
After the oxygen-fusing lifetime of a main-sequence star of 1.4 solar masses or less ends, it will expand to a red giant and fuse helium to carbon and oxygen. If it hasn't enough mass to generate the temperatures required to fuse carbon, it will shed its outer layers to form a planetary nebula, and will leave behind the core, called a white dwarf.
Its bright, white, and very hot. But it will continue to cool, until it becomes...

A black dwarf:
When a white dwarf cools off and no longer glows by its heat, it will eventually become a black cinder in space.

A brown dwarf:
A star that isn't massive enough (less than 75 Jupiter masses) to ignite hydrogen fusion in its core, a brown dwarf will radiate heat (about that of a kitchen oven).
It appears brownish or brick red (think of the red of heated iron). Brown dwarfs cool and darken steadily over their lifetimes, and will become too faint to be detectable.

Answer 3

what? i think you mean black holes, massive gravity objects which bend the fabric of dimension extreamly,

white dwarfs - dead, medium-small stars

red dwarfs - small stars that are red in color