The Solar System

3. A cloud of dust and gas in space.
4. Eclipse: Occurs when the moon passes though earths shadow.
5. The scientific study of the universe.
6. Colliding matter formed small, irregularly shaped bodies.
7. planets: Relatively small and rocky like Mercury, Venus, Earth and Mars.
10. The concept of an earth-centered theory.
11. The fuzzy, gaseous component of a comet’s head.
12. Small solid particle that travels though space.
13. Tails: Dust set free from vaporizing ice in the comet, carried away from the comet by the sun’s radiation pressure.
14. The depression that is produced by a meteorite.
15. Trails: When stars and planets seem to rise and appear to circle polaris.
17. Tail: ionzed gos pushed away from the comet by solar wind.
19. Small rocky bodies that orbit the sun.

1. Theory: A theory on how the solar systems formed.
2. Describes the view that the sun is at the center of the solar system.
8. The motion of one body about another.
9. Pieces of rocky and metal materials held together by frozen water, ammonia, methane, carbon dioxide and carbon monoxide.
16. Eclipse: Occurs when the moon moves in line directly between earth and the sun.
18. planets: Huge gas giants like Jupiter, Saturn, Uranus and Neptune.
20. Planet: A round object that orbits the sun but has not cleared the neighborhood around its orbit.