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unit 2 lesson 1 + 2

TermDefinition
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 orbit a star
light years the distance that light travels in one year
star a large celestial body that is composed of gas and that emits lights
univers space and all the matter and energy in it
apparent magnitude the brightness of a star wen you can see from earth
absolute magnitude absolute magnitude is a measure of how bright a star would be if it were seen from a distance
luminosity the actual brightness of a object like a star
Created by: 4804290975
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