Outer Space

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Across
  1. 2. our nearest galaxy
  2. 3. the planet with rings visible to the naked eye
  3. 5. a region of space made of gas and dust that serves as a nursery for stars
  4. 12. first US citizen in space
  5. 14. when one celestial body moves in front of another celestial body to cast a shadow onto a planet
  6. 17. the brightest star seen from the Southern Hemisphere
  7. 18. what happens when a star explodes
Down
  1. 1. the first rover to land on Mars
  2. 4. where light cannot escape
  3. 6. Jupiter's largest moon
  4. 7. one of Mars' moons; it means "panic" in Ancient Greek
  5. 8. the Seven Sisters
  6. 9. first dog in space
  7. 10. the brightest star seen from the Northern Hemisphere
  8. 11. the Swan
  9. 13. this is currently the largest telescope in space
  10. 15. the Hunter
  11. 16. this planet was excommunicated