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~ The Solar System ~

~ Unit 3 ~

QuestionAnswer
Solar System The sun and all of the planets and other bodies that travel around it.
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.
Galaxy A collection of stars, dust, and gas bound together by gravity,
Light-year The distance that light travels in one year; about 9.46 trillion kilometers.
Universe Space and all the matter and energy in it.
Apparent magnitude The brightness of a star as seen from Earth.
Luminosity The actual brightness of an object such as a star.
Absolute magnitude Absolute magnitude is a measure of how bright a star would be if it were seen from a standard distance.
Created by: AvrielaM3dina :3
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