| Answer | Crossword Clue |
|---|---|
| astronaut | a person engaged in space travel |
| astronauts | ASTRONAUT, a person engaged in space travel |
| spacewalk | A period of physical activity engaged in by an astronaut in space outside a spacecraft |
| spacewalks | A period of physical activity engaged in by an astronaut in space outside a spacecraft |
| voyages | A long journey involving travel by sea or in space |
| hyperspace | (in science fiction) A notional space-time continuum in which it is possible to travel faster than light |
