space

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Across
  1. 2. continuous area or expanse which is free, available, or unoccupied.
  2. 7. a person who is trained to travel in a spacecraft.
  3. 8. cylindrical projectile that can be propelled to a great height or distance by the combustion of its contents, used typically as a firework or signal.
Down
  1. 1. the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.
  2. 3. a celestial body moving in an elliptical orbit around a star.
  3. 4. the planet on which we live; the world.
  4. 5. a celestial body moving in an elliptical orbit around a star.
  5. 6. fourth planet from the Sun and the second-smallest planet in the Solar System,