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Science Terms
Study
Term | Definition |
---|---|
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. |