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Unit 3 Lesson 1

Historical Model of Solar System

TermDefinition
elliptical using or involving ellipsis, especially so as to be difficult to understand.
geocentric having or representing the earth as the center, as in former astronomical systems.
gravitational force the force of attraction between all masses in the universe.
heliocentric having or representing the sun as the center, as in the accepted astronomical model of the solar system.
moon the natural satellite of the earth, visible by reflected light from the sun.
orbit the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.
planet a celestial body moving in an elliptical orbit around a star. the earth.
solar system the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
parallax the apparent displacement of an object as seen from two different points that are not on a line with the object
Created by: 4801760380
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