Across
- 1. 3.26 light years
- 5. probe that lands softly on a planet
- 8. stretched light toward long end of spectrum
- 11. father of modern rocketry
- 12. brightest between sun and Sirius
- 13. first man to walk on moon
- 14. star-like body that emits radio waves
- 15. celestial latitude
- 16. first man-made satellite
- 18. prominent gas in most stars
- 19. first American female astronaut
Down
- 2. US moon mission craft
- 3. telescope type that uses mirrors
- 4. first American in space
- 6. first US space station
- 7. first country to build rockets
- 9. actual brightness of a star
- 10. satellite in fixed position relative to earth
- 17. mammal in space