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unit 2 lesson 2

vocab terms

TermDefinition
Solar system the sun and all of the planet and other bodies that travel around it.
Galaxy a collection of star,dust,and gas bound together by gravity.
Planet relatively large spherical body that orbit a star.
Light year the distance that light travels in one year about 9.46 trillion kilometer.
Star a large celestial body that is composed of gas and that emits light the sun is a typical star.
Universe space and all the matter and energy in it.
Luminosity
Created by: 4804301615
Popular Earth Science sets

 



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