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Science Terms

Study

TermDefinition
Astronomical unit the average distance between earth and the sun.
revolution the motion of a body that travels around another body in space
rotation the spin of a body on its axis
galaxy is a large collection of stars, gas, and dust that is held together by gravity.
planet is a spherical body that orbit the sun.
lightyear is the distance that light travels through space in 1 year.
solar system the collection of large and small bodies that orbit our central star.
star is a large celestial body that is composed of gas and emits light.
universe space and all the matter and energy in it.
Created by: 4801816326