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Unformatted text preview: Parallax and the Parsec Period-luminosity relation Star brightness and review distance factor Temperature and spectral class Spectral classification Page 1 of 2 SCI151r2 SCI 151 Astronomy O, B, A, F, G, K, M Other spectral information Composition Motion Magnetic fields Mass and diameter as determined from binary stars H-R diagram Allows astronomers to sort stars into categories Location of main sequence, red giants, blue giants, white dwarves, red dwarves Introduction to stellar evolution Principles of evolution Gravitational energy (Helmholtz contraction) Core contraction or expansion to red giant Options depending on mass White dwarves Supernova Mass luminosity relation The more massive the star, the more luminous it is. The more luminous it is, the more rapidly it evolves. Page 2 of 2 SCI151r2...
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