Did You Know The ESA Plans To 3D Print a Moon Base
Certainly it will take some time, and they didnt announce a set date. But imagine what 3D printing technology can do for space workers. No more need to send a $8M rocket to replace a broken tool.
Also the fact that the 3D printer is the obvious ancestor of the Replicator.
I wonder if you will be able to see this base with the naked eye.