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The Universe

unit 2

TermDefinition
solar system collection of large and small bodies that orbit our central star the sun.
planet is a spherical body that orbits the sun.
star is a large celestial body that is composed of gas and emits light.
galaxy large collection of stars, gas and dust that is held together by gravity.
light-year The distance that light travels through space in one year.
universe can be defined as space and all the matter and energy in it.
apparent magnitude is the measure of a star's brightness as seen from earth.
luminosity the brightness of a star.
absolute magnitude is a measure of how bright a star would be if the star were located at a standard distance.
Created by: user-1962919
 

 



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