Across
- 2. the Solar System
- 3. the Sun
- 7. eclipse
- 13. river
- 14. tropical
- 17. land
- 18. desert
- 20. planet
- 22. comet
- 23. dry
- 26. ocean
- 27. star
Down
- 1. forest
- 4. the sky
- 5. to discover
- 6. the Earth
- 8. continent
- 9. rock
- 10. to explore
- 11. valley
- 12. geography
- 15. island
- 16. the Moon
- 19. mountain
- 20. the Universe
- 21. astronaut
- 24. sea
- 25. lake