Across
- 1. Staying alive, especially in difficult conditions
- 4. The layer of gases surrounding a planet
- 7. An object that moves around a planet
- 9. The path an object follows around a planet
- 10. To send something into space
- 11. The outside or top layer of something
- 13. A gas needed to breathe
- 15. A force that pulls objects toward each other
Down
- 2. A person trained to travel and work in space
- 3. The act of traveling to learn about new places
- 5. Tools or machines used to solve problems
- 6. A long trip to a far place
- 8. An important job or goa
- 12. A group of people working together on a mission
- 14. To find or learn something new