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