Across
- 1. A person trained to travel and work in space
- 4. When a system stops working the way it should
- 6. A group of parts that work together to do a job
- 8. Sending and receiving information
- 9. The computer programs that control how a machine works
- 10. A small rocket engine that helps control movement in space
- 12. The curved path an object takes around a planet
- 16. The ability of something to work correctly over time
- 17. The chance that something could go wrong
- 18. Having extra systems that can take over if one fails
Down
- 2. The gas humans need to breathe
- 3. Tools and machines created to solve problems
- 5. The plan made before building something
- 7. A vehicle designed to travel in space
- 11. Being protected from danger or harm
- 13. Trying something out to make sure it works properly
- 14. An extra system that replaces the main one if it stops working
- 15. An important task or journey in space exploration