EAS 1540 Lecture Notes - Lecture 3: Big Bang, Nuclear Fusion, Beach Ball
15 Dec 2016
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Lec 3 - mon 8/29 - origins of earth, ocean. Big bang happened - glow that cooled, only hydrogen and helium in universe (not carbon) Hydrogen and helium fused to form other elements. Constant death and rebirth of stars; our sun is a 3rd gen star. Temperatures of large core masses increase due to compressional heating. Nuclear fusion of h into he is ignited. Every single atom making up your body was at one point in the center of a star. 4 billion years, the sun will blow up. Inner ones are solid, outer ones are gaseous. All the vaporized atoms that were once part of the sun and earth will eventually contract back to make new stars. Earth is tiny blue dot compared to everything. We are only a small part of this universe, there"s no reason why everything should work out for us. Summary: 4. 6 billion years ago elements condensed as the nebula cooled.
