Steam-propelled spacecraft prototype can mine water, run 'forever'

NASA-backed researchers have designed a spacecraft prototype that can propel between several celestial objects using steam. The World Is Not Enough (WINE) spacecraft can theoretically explore "forever", as long as water and sufficiently low gravity is present, researchers said, adding, "We could use this technology to hop on the Moon, Ceres, Europa, Titan, Pluto, the poles of Mercury, asteroids."