Across
- 1. Device to scrutinise the sky
- 3. tunnel through space time
- 5. hottest planet in solar system
- 6. related to galaxy
- 8. first man on moon
- 10. a rock with a tail
- 11. first man in space
- 12. biggest planet in solar system
- 13. person who goes to space
Down
- 2. first artifical satellite
- 4. astronomical model
- 7. rocky mass orbiting sun
- 9. the final stage of a star's life