ASTR 5 Study Guide - Final Guide: Star Formation, Nucleosynthesis, Seismology
Document Summary
Lecture 2: evolution of the universe, from big bang to earth. Gravity is dominated by the most massive constituent of the universe, dark matter. Galaxy was formed by slight densities and less dense areas then the dark matter pulls in berryonic matter > creates galaxies. They collide and come together, big ones take in smaller ones due to gravity. Formed from the heavy elements created by large, past stars. Plays a very important role as they die and expel their elements into space to form other planets/stars. A nebula disk of gas forms > this develops into a solar system. Triple alpha reaction causes the creation of carbon. Use of radioactive elements and daughter products is how we know the sun is ___ years old. Hadean earth earth was hell from primordial head. Volcanic activity was all over the surface. This created the early atmosphere: carbon dioxide, water, Very toxic atmosphere for life as we know it.
