AST101H5 Chapter Notes - Chapter 1: Small Solar System Body, Observable Universe, Solar System
Document Summary
Solar system consists of sun and all the objects that orbit it: the planets and their moons, and countless smaller objects including their moons and countless smaller including rocky asteroids and icy comets. Cosmic address: earth solar system milky way galaxy local group . Milky way galaxy huge, disk-shaped collection of stars. Containing a few more than 100 billion stars. Our galaxy is one of about 40 galaxies in the local group. The local group is part of the local super clusters which is one small part of the universe. Located halfway from the galactic center to the edge of the galactic disk. Galaxy great island of stars in space, containing a few hundred million to trillion or more stars. Galaxies appear to be arranged in giant chains and sheets with super voids between them. Our local group is located in the outskirts of the local super cluster.
