Escape the Spacecraft

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Across
  1. 4. Third planet from Sun
  2. 6. Discovered by Herschel
  3. 7. Satellite of Mars
  4. 9. Earth's galaxy
  5. 10. Term for natural satellite
  6. 12. Red planet
  7. 14. First living creature in space
Down
  1. 1. First man in space
  2. 2. Dog star
  3. 3. Planet whose day that lasts 8 mo.
  4. 5. Not even light can escape
  5. 8. Causes an eclipse
  6. 11. US gov't agency
  7. 13. Latin for Sun