Across
- 4. a man who works in commerce, especially at executive level.
- 7. a person who is trained to travel in a spacecraft.
- 8. a cylindrical projectile that can be propelled to a great height or distance by the combustion of its contents.
- 9. a person who is travelling or visiting a place for pleasure.
Down
- 1. a person who designs, builds, or maintains engines, machines, or structures.
- 2. the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.
- 3. the planet on which we live.
- 5. the physical universe beyond the earth's atmosphere.
- 6. the natural satellite of the earth