AST 101 Lecture Notes - Lecture 1: Interstellar Cloud, Bureau Of International Expositions, Scientific Notation
18 May 2016
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Document Summary
Chapter 1 - our place in the universe. Star, planet, satellite, asteroid, comet, solar system, nebular, stellar cluster, galaxy, cluster of galaxies, large scale structure, universe. A large, glowing ball of gas that generates heat and light through nuclear fusion. A moderately large object that orbits a star; it shines by reflected light. Planets may be rocky, icy or gaseous in composition. A relatively small and rocky object that orbits a star. A relatively small and icy object that orbits a star. A star and all the material that orbits it, including its planets and moons. A great island of starts in space, all held together by gravity and orbiting a common center. Filaments and voids in galaxy distribution in the universe. The sum total of all matter and energy; that is, everything within and between all galaxies (14 billion years old). Big bang -> universe -> galaxy -> star and nebula -> planet.
