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Universe

TermDefinition
Universe All existing matter and space considered as a whole
Light-Year A unit of astronomical distance that light travels in one year
Solar System The collection of eight planets and their moons in orbit around the sun.
Galaxy A system of millions or billions of stars
Planet A celestial body moving in an elliptical orbit around a star
Star A fixed luminous point in the night sky that is a large, remote incandescent body like the sun
Astronomical unit A unit of measurement equal to 149.6 million kilometers
Created by: 4801799426
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