[gomaaa]

Thought you were talking about teraforming the moon there for a second! Yeah, it would make it a lot cheaper to establish a permanent base if we didn't have to haul our own H2O up there. We could even use it to make rocket fuel there instead of shipping everything up from Earth, thus making a trip to Mars or wherever that much cheaper.

This all assumes we can figure out how to change the course of a comet. Not a small project, as you pointed out!

[RightWhale]

teraforming the moon

There would be inherent limitations in doing that since the moon is too small to hold an atmosphere and increasing the size of the moon appreciably would cause collateral changes on earth. Instead, a comet or some comets would be maneuvered to impact--as lightly as possible--the moon and the ice and carbon content would be put in storage. Much of the technology for capturing a comet would be similar to that used for asteroid mining.

Similar to the tech used to save earth from bombardment by killer asteroids, too.