1. SSI 2007 Gage Down to Basics Some important terms to understand our solar system

2. SSI 2007 Gage On the Move… Rotation movement of a body on its imaginary axis Revolution movement of one object around another

3. SSI 2007 Gage On the Move… Day period of time for one complete rotation Year period of time for one complete revolution Orbit path of a body during revolution path of a body during revolution

4. SSI 2007 Gage Things that Move… Solar system a star and the celestial objects that orbit the star Our solar system contains the Sun, planets, moons, asteroids, and comets NASA

5. SSI 2007 Gage Things that Move… Star self-luminous object; our star is called the Sun Satellite smaller object that orbits a larger object Planet object that orbits a star Moon object that orbits a planet

6. SSI 2007 Gage Things that Move… Asteroid small rocky body that orbits the Sun; may be contained in the asteroid belt Comet “dirty snowball” composed of ice, rocky material, dust and gases; very eccentric orbit

7. SSI 2007 Gage Cover-Ups… Atmosphere blanket of gases that surrounds a planet Venus Jupiter Titan (moon) Has an atmosphere Ganymeade (moon) Mercury Has no atmosphere