cool
I assume you mean a DWARF STAR. There are different types of dwarf stars; the white dwarfs are fairly hot - but the reason they are dim is that they have a very small surface area.
A white dwarf has approximately the mass of our Sun, in a volume that's about a million times smaller - so it has a very high density (some tonnes per cubic centimeter). It's also very hot. Since energy production has stopped, they will cool down over time, but not enough time has elapsed for that to happen yet - in other words, the existing white dwarves are still very hot.
A white dwarf no longer produces energy through fusion but remains hot from the residual heat of the star it once was. It will radiate that energy away and slowly cool as a result, eventually becoming a black dwarf.
As the name white dwarf implies, this is a small type of star, and it has less surface area from which to radiate light, so even if it is hot, and giving off lots of light per square mile, there are fewer square miles than in larger, non-dwarf stars, so there is less total light being emitted.
Black hole- an object so dense that even light cannot escape its gravity Red Giant - a large star that is relatively cool White Dwarf - an old, very dense hot star that is cooling Nebula - A mass if gas and dust
A white dwarf is the remains of an old star, but they still remain very hot and will continue to shine as a white dwarf for many millions of years until they gradually cool off to become black dwarfs. They are very dense.
No it is a small star (about the size of Earth) that is VERY dense and quite hot (although it is not producing new energy).
White Dwarf Stars.
Only a red dwarf star is red. Our Sun is a yellow dwarf. A red dwarf is red because it is cool, and cool colours are red whereas hot colours are white and blue.
I assume you mean a DWARF STAR. There are different types of dwarf stars; the white dwarfs are fairly hot - but the reason they are dim is that they have a very small surface area.
A white dwarf has approximately the mass of our Sun, in a volume that's about a million times smaller - so it has a very high density (some tonnes per cubic centimeter). It's also very hot. Since energy production has stopped, they will cool down over time, but not enough time has elapsed for that to happen yet - in other words, the existing white dwarves are still very hot.
All stars are very hot. Even the comparatively "cool" ones have temperatures of thousands of degrees.
A white dwarf no longer produces energy through fusion but remains hot from the residual heat of the star it once was. It will radiate that energy away and slowly cool as a result, eventually becoming a black dwarf.
Proxima centaury's surface is made of plasma because this star is a red dwarf. This red dwarf is the closest star to the solar system and has a surface temperature of about 3500 degrees Kelvin.
Red stars are cooler than stars of other colors but are still quite hot, which is why the glow red.
As the name white dwarf implies, this is a small type of star, and it has less surface area from which to radiate light, so even if it is hot, and giving off lots of light per square mile, there are fewer square miles than in larger, non-dwarf stars, so there is less total light being emitted.
No, the surface temperature of Betelgeuse is colder than the temperature of a white dwarf, the white dwarf is the hot core of a dead star. Also, red stars are always colder than white stars.