Across
- 2. To become gas
- 6. To approach the ground with a vehicle
- 7. A flight into space
- 10. The existence of living beings on Earth
- 13. The outer layer of Earth
- 14. The center of Earth
- 15. To rotate around an object
- 16. The measured amount of heat in a place or in the body
- 18. A staff onboard a vehicle
- 19. To make something more modern
Down
- 1. usual, not special
- 3. A person aboard a vehicle
- 4. A nickname for Earth due to its appearance from space
- 5. An adjective describing a system where the sun is the main star
- 8. The amount of space between two places
- 9. To become ice
- 11. The Earth's axis is this (not straight)
- 12. A spaceship in other words
- 17. A natural satellite that orbits Earth