AST201H1 Lecture Notes - Lecture 1: Vera Rubin

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST201H1
• Professor: Bryan Gaensler

Document Summary

Zwicky saw galaxies and atempted to calculate the mass of these galaxies that orbited together, and realized that there was a lot of missing mass (about only 1/10 of the mass was accounted for) Established that most of the things that make up a galaxy cannot be perceived by us this is dark mater. Milky way galaxy, takes us 220 million years to go around the galaxy once. The spinning rate of diferent galaxies was calculated by vera rubin. Not that gravity is incorrect, but like zwicky concluded that a good majority of a. Raio of dark-to-light mater was 10:1 (said by rubin) galaxy is dark mater. 20s and 30s claimed 100% of the universe was normal mater. 80s to 90s claimed 10% of the universe was made of stars, galaxies, stars, etc. and the rest is dark mater.