PHYS 180 Study Guide - Final Guide: Wilkinson Microwave Anisotropy Probe, Nucleosynthesis, Junkers F.13
Document Summary
If the universe were in nite, every line of sight should. But in reality it is mostly dark. The universe has a nite seize but it is dif cult to have a universe with edges as it should collapse under its own gravity. Absorbing material: should be able to see this material at other wavelengths since everything radiates. Universe is expanding (redshift): something that is moving causes light to stretch/shift to small energies (helped solve the paradox, but not quite) from more distant things has not had time to reach us. Universe has a nite age: we can only see so far as light. De nes overall scale of universe and things in it. Has a limited reach in the universe. See how much the object has moved as the earth has moved in a certain timeline. Nearest stars, use triangulation - using those stars, we can measure their periods of pulsation and those of other cepheids.
