A black dwarf. See related question.
No. There is no such thing a a cold star. Sirius consists of two stars, both of which are hotter than the average star.
it determines how hot or cold the star is, for example, a blue star means its boiling hot and a red star means its unbearably cold...
how hot or cold a star is.
No, it is not.
cold star ratings mean something or other by the way JOSEPH RULES!
There is no such thing as a purple star.
That means that it's a start, that it's old, and that it's cold.Basically it might refer to a black dwarf - a hypothetical star that doesn't exist yet, but which it is assumed will exist in the far future - a white dwarf that has cooled down.
its big but not that big as a old star. sun is a tape of star.
No, the T Tauri star is not a giant star, in fact it is a medium-sized star. It is also a very cold star.
Starfish are cold blooded.
Arcturus is hot. Bear in mind that only a hot star is even going to be seen in the night sky. Any cold star would also be dark.