Across
- 2. the type of force that keeps the Earth and all the planets intact
- 4. the half of a celestial sphere
- 6. the path travelled by the planets and the moon
- 7. the star at the centre of the solar system
- 9. the largest planet in the solar system
- 12. when day and night length are equal
- 15. the alternate rising and falling of the sea
- 16. type of eclipse when the moon passes between the Earth and the Sun
Down
- 1. our home planet
- 3. a technology used to make discoveries about the universe
- 5. Earth's natural satellite
- 8. the planet closest to the Sun
- 10. the planet famous for its rings
- 11. what earth spins on
- 13. the type of moon when you cannot see it in the sky
- 14. an Italian physicist and astronomer