PCS 181 Lecture Notes - Lecture 4: Globular Cluster, Horse Length
21 Mar 2013
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Recall the cobe satellite which was launched to confirm the cmb ~ 3 k (2. 728 k). Cobe was later asked to seek very small temperature variations in the cmb. Cobe found tiny temperature deviations of +/- 0. 0003 k. Pink regions = 2. 278 + 0. 0003 k. Blue regions = 2. 278 0. 0003 k. Galaxy theorists hypothesize that galaxies condensed at the interface between warmer and cooler volumes of space. *note: the history of the universe is on test # 1. The first stars to form after the big bang were extremely massive hundreds of times the mass of our sun. These stars only lived a few million years and exploded as supernovae, leaving black. These massive black holes attracted gas/dust into orbit. Overtime, the system attracted more matter until a galactic mass was present. Massive black holes are found at the centers of most galaxies. A galaxy is a gravitational-bound collection of stars, gas, dust, radiation.
