Abstract :
This paper discusses the advancement of space exploration. According to Bill Stone, 90 percent of the weight of present-day space vehicles, and much of the exorbitant cost of spaceflight, comes from the fuel needed to break through the Earth\´s atmospheric chains. He is convinced that if you could set up a "water-mining" operation on the moon you could use the water to make liquid oxygen rocket fuel and then port it back to a low-Earth-orbit "gas station," where new kinds of spacecraft could fuel up and take off for the stars.
