Satellite for a Satellite

Earth's satellite, the Moon, now has a satellite of its own. The US space agency NASA has put the Grail-A space craft in an orbit around the Moon. The main object for the satellite and its forthcoming twin Grail-B is to map measurements that will give scientists new knowledge on the internal structure of the Moon. This may not sound very interesting, but I believe it can give us an idea on the natural resources that can be found in the Moon. With natural resources ready to be harvested, there would be an idea in putting permanent settlements on the Moon. This would be an exciting idea.