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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;about 9.46 trillion kilometers.
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 million kilometers symbol,AU.
Created by: 4900720381
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