Several near-earth asteroids can be travelled to at a delta-vee lower than going to the Moon. Remember that the Moon still has a gravity and no atmosphere, so a

Several near-earth asteroids can be travelled to at a delta-vee lower than going to the Moon. Remember that the Moon still has a gravity and no atmosphere, so actually landing still takes a lot of energy. An asteroid on the other hand has no gravity (at this scale) and may swing by closer than the Moon does. A chart http://upload.wikimedia.org/wikipedia/commons/c/c9/Deltavs.svg http://upload.wikimedia.org/wikipedia/commons/c/c9/Deltavs.s...