Earth Science Review

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