Across
- 3. Layer of gases surrounding a planet
- 6. First model or test version of a design
- 7. A person trained to travel in space
- 9. A person who designs solutions to problems
- 13. Moon dust and crushed rock
- 14. Harmful energy from space
- 15. The red planet humans may visit next
Down
- 1. Something that is built or constructed
- 2. Rounded structure shape
- 4. Machine that can work automatically
- 5. Able to operate without human control
- 8. A protected place to live
- 10. Machine that builds objects layer by layer
- 11. A permanent settlement of people
- 12. Relating to the Moon