Evan astro cheat sheet

Evan astro cheat sheet - NUCLEAR FUSION: The process in...

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Unformatted text preview: NUCLEAR FUSION: The process in which lightweight atomic nuclei smash together and stick to make heavier nuclei. DWARF PLANET: An object that meets the first two criteria but has not cleared its orbital path, like Pluto, is designated a dwarf planet. MOON: An object that orbits a planet. The term satellite can refer to any object. ASTEROID: A relatively small and rocky object that orbits a star. COMET: A relatively small and ice- rich object that orbits a star but is too small to qualify as a planet or dwarf planet. SOLAR SYSTEM: The sun and all the material that orbits it, including planets, dwarf planets, and small solar system bodies. STAR SYSTEM: A star (sometimes more than one star) and any planets and other materials that orbit it. GALAXY: A great island of stars in space, containing from a few hundred million to a trillion or more stars in space, containing from a few hundred million to a trillion or more stars, all held together by gravity and orbiting a common center. SUPERCLUSTER: A gigantic region of space where many individual galaxies and many groups and clusters of galaxies are packed more closely together than elsewhere in the universe. UNIVERSE: The sum total of all matter and energy that is, all galaxies and everything between them. OBSERVABLE UNIVERSE: The portion of the entire universe that can be seen from Earth, at least in principle. The observable universe is probably only a tiny portion of the entire universe. ASTRONOMICAL them....
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This note was uploaded on 09/29/2010 for the course PHY- 104 taught by Professor Castoldi during the Fall '10 term at Oakland University.

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