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universe

TermDefinition
Universe space and all the matter and energy in it
Light-Year the distance that light travels in one year
Solar System the sun and all of the planets and other bodies that travel around it
Galaxy a collection of stars, dust, and gas bound together by gravity
Planet a relatively large spherical body that orbits a star
Star a large celestial body that is composed of gas and that emits light; the sun is a typical star
Astronomical-Unit the average distance between earth and the sun; approximately 150 millions kilometers.
Created by: 4801765517
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