If it is small and cool enough it could be a "brown dwarf". If it is a little warmer it is called a "Red Dwarf".
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.
red giant
The coolest stars are red in colour
It's temperature.Blue = hot, red = cool.
If it is small and cool enough it could be a "brown dwarf". If it is a little warmer it is called a "Red Dwarf".
A red star is cool whereas a blue star is hot.
A red dwarf star. See related question.
A Dwarf
red dwarf i think!
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.
That can either be an old white dwarf, a red dwarf. or a brown dwarf.
red giant
Red is the coolest star and blue is the hottest.
red giant
The coolest stars are red in colour
They are known as 'Redgiants'