Across
- 2. the top layer of the Earth where plants grow
- 6. a hill of sand shaped by the wind
- 10. a bright object in space with a long tail
- 11. a vehicle used to travel in space
- 13. the sun and the planets that orbit it
- 14. a large hole on a planet or moon
- 18. an object that orbits a planet
- 19. a dark blue, windy planet
- 20. a planet that rotates on its side
- 22. a scientist who studies stars and planets
- 25. the largest planet in our solar system
Down
- 1. a dwarf planet far from the sun
- 3. a thick layer of ice covering land
- 4. the hottest planet in our solar system
- 5. the smallest planet closest to the sun
- 6. a streak of light made by a burning rock in the sky
- 7. a tool used to see faraway objects
- 8. a building where people watch the sky
- 9. a huge group of stars and planets
- 12. a person trained to travel in space
- 15. a large round object that orbits a star
- 16. the star at the center of our solar system
- 17. a planet with large rings
- 21. the planet we live on
- 23. the red planet
- 24. a hard piece of the Earth’s surface
- 26. a strong metal found in space rocks