GE CLST 70A Lecture Notes - Lecture 7: Particle Accelerator, Black-Body Radiation, Cosmic Microwave Background
23 Jan 2017
School
Department
Course
Document Summary
Linear relationship between distance and velocity away from us due to an expansion of space. Something 2x as far away will appear to be traveling 2x as fast (midterm) If all the stuff in the universe was in the same place once upon a time, it would"ve been dense enough to for a massive black hole from which nothing could escape or explode. Stuff evenly spread out in an expanding universe. Time as we know it began with the big bang, so asking what came before the big bang doesn"t. It is the creation of time and space make a lot of sense. Matter and energy were uniformly spread through the universe from the very beginning. Objects condense at their original location while the universe expands. Hubble did measure a redshift for distant galaxies, but it"s not quite right to think of this as a. Doppler shift since that would be due to motion through space.
