Lift Off - Exploring the Universe

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Across
  1. 4. - Area in space where gravity pulls everything in (-)
  2. 6. - A substance existing in space that does not give off any light (-)
  3. 8. - Upper part of any planetary atmosphere
  4. 10. - Absence of matter
  5. 12. - A spacecraft that travels through space to collect science information (-)
  6. 14. - Related to Earth
  7. 15. - Spaceflight with crew or passengers (-)
Down
  1. 1. - Instrument to view distant objects
  2. 2. - A unit of astronomical distance (-)
  3. 3. - Journey to distant place
  4. 5. - The act of colonizing
  5. 7. - Abbreviation for science fiction (-)
  6. 9. - A vehicle for exploring rough terrain
  7. 11. - Small, rocky objects that orbit the Sun
  8. 13. - Path of an object around a particular point in space