- Nasa will make use of 'gravity fields' behind the moon so that spaceship can be 'parked' in space
- Base will be 277,000 miles from Earth
Nasa wants to build a manned base which can be 'parked' beyond the dark side of the moon as a 'gateway spacecraft', to serve as a starting point for manned expeditions to Mars.
It would remain permanently in space 277,000 miles from Earth - in context, the International Space Station is just 230 miles away.
The spaceship would expand man's horizons - but it will require much problem-solving to figure out how to protect astronauts from radiation, and how to re-supply the ship from a quarter of a million miles away.
On the way to Mars: Nasa is exploring the possibility of placing an Orion space station in a stable location on the far side of the moon.