Space Exploration

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Across
  1. 2. holds us down but holds planets up
  2. 6. a world beyond our system
  3. 10. detachable part of a spacecraft
  4. 11. Earth's eye in the sky
  5. 12. launch vehicle for space missions
  6. 13. massive, star-studded system
Down
  1. 1. the path followed by a planet, moon, or satellite
  2. 3. an explorer taking one small step for man and a giant leap for mankind
  3. 4. cosmic cloud of dust and gas
  4. 5. solar orbiting snowball
  5. 7. telescope that lives in orbit
  6. 8. star-gazing instrument
  7. 9. the appearance of a planet moving backward