How does a star ignite?

Nuclear Fusion.

No. They are still there, but you can't see them because of the sun. ( stars don't have light switches).

i think it means dip f-word popularized by a mysterious influential artist. little is known about him but he also believed to have popularized the word tits which can replace the words cool or...

A blue star is the hottest. I've yet to see a green star. (The usual cause of star color is cavity/blackbody radiation. It turns out that by the time there's enough intensity in the green region for...

Color in terms of stars in almost opposite what you would think. White stars of spectral class B or A are hotter than yellow stars of spectral class F or G.