AS101 Lecture Notes - Lecture 1: Planck Length, Elementary Particle, Field Of View
Document Summary
84 au, so therefore the claim that at a distance of 11,000 au there are no stars is true. Expanding our view 3000 times: when we expand our view 3000 times, we see our galaxy, the milky way. Milky way: contains 100 x 109 stars, diameter of 80,000 ly = 8. 0 x 104 ly x 63,240 au/ly = 5. 06 x 109 au. It is typically a spiral galaxy, and larger than most other galaxies. The existence of super clusters indicates that the galaxies in the universe are not uniformly distributed. Most of them are drawn together in groups and clusters, with groups containing up to some dozens of galaxies and clusters up to several thousand galaxies. Those groups and clusters and additional isolated galaxies in turn form even larger structures called superclusters. The horologium supercluster is a gigantic supercluster with a length of about 550 million ly.
