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