AST 104 Lecture Notes - Lecture 13: Solar Mass, Planetary Nebula, Type Ii Supernova
Document Summary
How far fusion goes in making heavy nuclei, Hydrogen fuses to helium, and then helium fuses to carbon. No fusion beyond carbon: not enough pressure builds up in the star"s core. Hydrogen fuses to helium, helium fuses to carbon, then heavier elements fuse (oxygen, neon, magnesium, and silicon), all the way up to iron. What kinds of giant phase the star goes through, Stars move upward on the h-r diagram to higher luminosity without much change in temperature. Stars move down (when he fusion starts,) then up again. Stars move rightward on the h-r diagram, toward cooler temperatures without much change in luminosity. Stars move left and right a few times, as fusion proceeds. Star gradually loses its outer parts via a stellar wind, forming a beautiful planetary nebula. Star loses its outer parts in a violent explosion, called a type ii supernova. What kind of star is left behind.
