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GRAVITY a force of attraction between objects that is due to their masses
MODEL a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept
ORBIT the path that a body follows as it travels around another body in space
SURFACE GRAVITY intensity of the force of gravity at the surface of the earth or a celestial body.
ASTEROID a small, rocky object that orbits the sun; most asteroids are located in a band between the orbits of Mars and Jupiter
COMET a small body that gives off gas and dust as it passes close to the sun; a typical comet moves in an elliptical orbit around the sun and is made of dust and frozen gases
METEOR a bright streak of light that results when a meteoroid burns up in Earth’s atmosphere
GALILEAN MOONS the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto
SATELLITE a small object that orbits, or revolves around, a larger object in space
TERRESTRIAL PLANETS one of the highly dense planets nearest to the sun; Mercury, Venus, Mars, and Earth
GAS GIANT a planet that has a deep, massive atmosphere, such as Jupiter, Saturn, Uranus, or Neptune
Created by: tyoung67