Across
- 3. an asteroid that intersects earth's orbit
- 4. commanded the sun to stand still
- 6. relationship between gravitational force and distance
- 9. the force existing between particles
- 13. center of the atom
- 14. created theory of relativity
Down
- 1. fifth planet from the sun
- 2. view that the earth is the center of the solar system
- 5. view that the sun is the center of the solar system
- 7. shape of earth's orbit
- 8. the force required by circular motion
- 10. an asteroid that hits earth's atmosphere
- 11. Saturn, Uranus, Jupiter and Neptune all have these
- 12. relationship between gravitational force and mass