AST101H1 Chapter Notes -Sample-Return Mission, Galilean Moons, Milky Way
11 Dec 2013
School
Department
Course
Professor
23
AST101H1 Full Course Notes
Verified Note
23 documents
Document Summary
Sections 1. 1, 1. 2, 1. 4 figures 1. 1, 1. 4, 1. 5, 1. 10. The full cosmic address of earth is earth, solar system, milky way galaxy, local group, local supercluster. Solar system: consists of the sun and all the objects that orbits it such as, planets and their moons, and smaller objects such as rocky asteroids and icy comets. Galaxy: great island of stars in space which contains a hundred million and a trillion or more stars held together by gravity and orbiting a common centre. Stars: a large, glowing ball of gas that generates heat and light. Sun is a star just like the stars we see in our night sky. Dwarf planet: an object that meets the first two requirements of being a planet, but doesn"t meet the third is considered a dwarf planet, like pluto. Moon (satellite): an object that orbits a planet. Au is the earths average distance from the sun (about 150 million km).
