EAS 1540 Lecture Notes - Lecture 22: Outgassing, Water Vapor
27 Jun 2016
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**summaries available on website, blue is probably on exam, red is. Gasses cooled, dark period began for 500 mil. years. Gravity drew gasses together to form larger and larger clouds, gravity became stronger and stronger. Our solar system formed 4. 5 bil. years ago. At time of big bang, only h and he in the universe. Gravity pulled these elements together, creating heavier elements like c, When large stars exploded, even heavier elements are formed like gold. New stars form when gravity collapses nebulae (gas clouds) containing light and heavy elements from previous star explosions. Our sun is thought to be a 3rd generation star. Roughly 100 billion galaxies with each containing roughly 100 billion stars. Small planetesimals collide together, aggregate to form a planet. Contain the heavier elements (fe, si, o) 4. 6 billion years ago, rock-forming elements condensed into small solid grains as the nebula cooled.
