Across
- 3. A ball of gas held together by gravity
- 5. Nicknamed the Red Planet
- 7. The force that attracts people to the Earth
- 8. Made up of the sun and the planets which orbit it
- 10. The largest planet in our solar system
- 13. The planet closest to the sun
- 15. The planet we live on
- 16. The seventh planet from the sun
- 18. An object which moves around a star
- 19. Revolves around the Earth
- 20. The second planet from the sun
Down
- 1. Four planets in the Solar System are known as _ planets
- 2. Billions of stars, gas and dust held together by gravity
- 4. The star in the centre of the Solar System
- 6. A person trained to travel in a spacecraft
- 9. The galaxy our Solar System is in
- 11. No longer considered a planet
- 12. The planet furthest from the sun
- 14. A vehicle that launches into space
- 17. Known for its rings