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Unformatted text preview: Why Do Stars Form? Thursday, March 04, 2010 1:44 PM 1. There a lots of ways that could have triggered the birth of the sun o Need cold and dense gas o Only see bright stars on spiral arms bc they produce stars-- those are the young, hot, luminous stars o Collisions between galaxies and gas clouds can both form stars o Supernovae can trigger star formation 2. How are stars born? o What 3 things can be between stars? • Dust • Gas • Dark matter o Where do new stars from? • Nebulae o How does the death of one star trigger the birth of many new ones? • Supernova sends shockwaves through the clouds • When it hits dust and gas clouds, material from supernova gets mixed in • This is how we suspect our sun was formed o See chapter 18 3. More nuclear reactions o Proton-proton chain • Not the only method to nuclear reactions • Hard to reproduce conditions in a star on earth, but we have some ideas • Small change in temperature makes a big change in how reactions occur (due to the fourth power)...
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- Spring '08