1) Space travel 2) Spaceflight 3) Voyage 1) Spaceflight 
To be spacefaring is to be capable of and active in the art of space travel or space transport, the operation of spacecraft or spaceplanes. It involves a knowledge of a variety of topics and development of specialised skills including (but not limited to): aeronautics; astronautics; programs to train astronauts; space weather and forecasting; ship...