Across
- 4. to set
- 5. part of the rocket where people work
- 7. name of the first man in space
- 9. the space program that sent the first unmanned spacecraft
- 11. to burst into pieces
- 12. to change
- 13. to arrive on the ground
Down
- 1. solidly; strongly
- 2. to give up; to leave forever
- 3. future date for completion
- 6. part of the rocket where people work
- 8. not natural; man-made
- 10. a circular path in space around a planet