Across
- 3. a large boat
- 6. a machine in space
- 9. finding something new
- 10. improvement
- 13. an exciting event
- 15. too good to be true
Down
- 1. trip with a goal
- 2. a series of events in order
- 4. space vehicle
- 5. a difficult task
- 7. awesome
- 8. used to launch in space
- 11. above the sky
- 12. act of flying
- 14. not discovered, not known