Across
- 4. Hottest planet in our solar system
- 5. Planet famous for its prominent ring system
- 6. Icy object that can develop a glowing tail as it approaches the Sun
- 8. Natural satellite that orbits a planet
- 10. Largest planet in our solar system
- 13. Galaxy that contains our solar system
- 14. Powerful explosion that occurs at the end of some stars' lives
- 15. Huge cloud of gas and dust in space
- 17. Large object that orbits a star
- 19. Person trained to travel and work in space
- 20. Farthest planet from the Sun in our solar system
Down
- 1. Planet closest to the Sun
- 2. Instrument used to observe distant objects in space
- 3. Force that keeps planets in orbit around the Sun
- 7. Event where one celestial body moves into the shadow of another
- 9. Curved path of an object around a planet, star or other body
- 11. Recognisable pattern of stars as seen from Earth
- 12. Planet often called the Red Planet
- 16. Rocky object that orbits the Sun and is smaller than a planet
- 18. Enormous group of stars, gas and dust held together by gravity