Across
- 4. Model that the earth orbits the sun.
- 6. When objects follow an elliptical orbit
- 9. dust grains that collide and stick together
- 11. object move in a circular path.
Down
- 1. The sun and all the bodies in space.
- 2. The path that a body follows
- 3. a force of attraction between objects
- 5. Model that the sun, planets orbit the Earth.
- 7. apparent shift in the position of an object
- 8. a cloud of dust and gas
- 10. object is further away from the sun.