Across
- 2. how long it takes for the Earth to revolve around the sun
- 3. the Earth belongs to this galaxy
- 6. theory about the creation of the universe
- 10. when a meteroid burns in the atmosphere and hits the ground
- 11. objects revolving around the sun that are too small and too numerous to be considered planets
- 14. streak of light produced by a burning meteroid in Earth's atmosphere
- 15. a ball of ice & dust that orbits the sun
- 16. to revolve around another object
- 17. any consolidated, large object which orbits a star
- 18. the movement of one object around another (Earth around the sun)
Down
- 1. having the earth as center
- 4. measure of the force of gravity on an object
- 5. a chunk of rock or dust in space that comes from comets or asteroids
- 7. how long it take for Earth to complete a rotation
- 8. the amount of matter in an object
- 9. force that keeps the planets in orbit
- 12. the spinning of the Earth on its axis, day and night
- 13. having the sun as center