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Universe

TermDefinition
Universe all existing matter and space considered as a whole; the cosmos.
Light year a unit of astronomical distance equivalent to the distance that light travels in one year.
Solar system the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
Galaxy a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Planet a celestial body moving in an elliptical orbit around a star. the earth.
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, the mean distance from the center of the earth to the center of the sun.
Created by: 4801753903
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