Star watch: Red dwaft stars

   "Dad, the sky seems darker these days?"
   "Yes, many stars had burnt excessively in the
   process known as "subprime" and turned red."
   (July 2008)

A red dwarf is a small and relatively cool star on the main sequence. It ranges in masses
from 0.075 - 0.50 solar masses and have a surface temperature of less than 4,000K (reddish).
Red dwarf is estimated to make up three-quarters of the stars in the Milky Way. It actually burn
off slowly.
In general, the more massive a star is, the shorter its lifespan on the main sequence.

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Basic Astronomy