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Types of Stars

Across
small and relatively cool stars, bigger than brown dwarfs, but less than 40 - 50% of the mass of our Sun.
main-sequence stars like our own Sun, typically about 80 - 100% of the size of the Sun
stars that grow and shrink in size periodically and appear to pulsate.
bright, giant stars, between 10 and 100 times the size of the Sun
"failed stars", which form from clouds of interstellar gas, as other stars do, but never reach sufficient mass, density and internal heat to start the nuclear fusion process.
Down
is typically only the size of the Earth, but 200,000 times more dense.
two stars in close proximity which orbit around their common center of mass.
has a mass of only between 1.35 and about 2.1 times that of our Sun, it is 60,000 times smaller than the Sun
bright, main-sequence stars with masses from 1.4 to 2.1 times the mass of the Sun
luminous giant stars of low or intermediate mass (usually between 0.5 and 10 solar masses) in a late phase of stellar evolution
hypothetical stellar remnants created when a white dwarf becomes cool and dark after about ten billion years of life