PCS 181 Lecture Notes - Lecture 3: Vera Rubin, Cyclic Model, Neutrino

• School: Ryerson University
• Department: Physics
• Course: PCS 181
• Professor: Margaret Buckby

Document Summary

Time after big bang: 1 x 1012 years. All stars will have experienced ~10 disruptive encounters, flinging their planets into space. Evaporation of stars and collapse of galaxies into the central black holes. P+ -> e+ + v(a positron and neutrino) E+ + e- ->y (a photon= a burst of radiative: 1 x 10100 years energy, far future. Hawking-> black holes decay (research report) electrons, protons, neutrons, photons. Black hole a lot of matter in small volume space. The big fizzle = an ever-expanding gas of. Super massive black holes one in milky way. Future of a closed or oscillating universe: the expansion phase = statements 1. Above: at some unknown future time, re-contraction begins. The density of the universe increases, the number of black holes increases. They feast on everything within reach: black holes will meet and coalesce (merge) into one black hole=the universe=the new singularity = the big crunch. Gravity will dominate and re-contract the universe.