ASTRO-110 Lecture Notes - Lecture 1: Orion Nebula, Interstellar Cloud, Astronomical Unit
18 Sep 2020
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Document Summary
Our place in the universe through nuclear fusion, held together by gravity. Star - a large, glowing ball of gas that generates heat and light (own energy) Planet a moderately large object that orbits a star, it shines by reflected light. Moon an object that orbits a planet. Asteroid a relatively small and rocky object which orbits a star. Leftover chunk of a meteor is called a meteorite. When it impacts a planet, it is called a meteor. Planets may be rocky, icy, or gaseous in composition. Planets orbit stars out of snow, dirt, mud, ice) gravity and orbiting a common center. Comet relatively small and icy objects which orbit a star (like a snowball made. Constellations not real just a dot to dot thing. Nebula an interstellar cloud (hot and glowing) of gas and dust, good nurseries. Galaxy island universe a great island of stats in space, all held together by.
