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TermDefinition
solar system the sun and all of other planets
galaxy a collection of stars
planet a realatively large spherical body that orbits a star
light year the light that travels in one year about 9.46 trillion kilometers
star a larger celestial body that is composed of gas and that emits light
universe space and all the matter of energy in it
luminosity that brightness of an object such as a star
apparent magnitude the brightness of a str as seen from earth
absolute magnitude a measurement of how bright a star would be if it were seen from a stander distnce
Created by: 4804195776
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