Across
- 2. / masses in orbit around another mass
- 3. / the way something moves around something else
- 5. / oval shaped
- 9. / path an object takes around another object
- 10. / force of attraction between masses
Down
- 1. / one comlete orbit around the Sun
- 4. / every four years
- 6. / caused by the tilt of the Earth's axis
- 7. / a ball of ice, rock and gases
- 8. / the line between the North and South Pole