Across
- 1. earth centered solar system
- 4. sun centered solar system
- 6. a form of energy that exerts negative repulsive pressure
- 7. a meteoroid that strikes Earth's atmosphere
- 8. small rocky bodies that orbit the sun
- 9. Jupiter, Saturn, Uranus, Neptune
- 10. made up of water, methane, and ice-dirty snowballs
Down
- 2. Mercury, Venus, Earth, and Mars
- 3. relatively small pieces of debris chipped off asteroids
- 5. the intrinsic brightness