ASTR 103 Lecture Notes - Lecture 21: Planetary Nebula, Stellar Evolution, Red Dwarf
Document Summary
Everything that a star is (color, temperature, size, how long it lives) all depends on its mass. Minimum mass for fusion (m greater than or equal to . 08 solar masses) If a mass is not greater than . 08 then the star will not form because the mass is not large enough and instead a brown dwarf would not be formed. Red dwarfs live the longest (all are still living) and use their energy the most effectively. Largest stars use up their energy and die off the fastest, but these effectively use energy, therefore they live much longer in comparison. Enough dense material for something to be come a star or even a solar system. Heating up and attempting to move toward the main sequence. Once they meet the main sequence they actually become a star. Low mass stars take much longer to get to the main sequence. Gas and dust ejected by a dying star.