[C210N]

There is no “dark” side of the moon, but there is a far side (no relation to the cartoons of that name).

A telescope on the far side would be interesting - it would need an orbiter communication system, as there would be no direct signal to earth.

[P.O.E.]

Never thought about signalling, you’re right.

[Lonesome in Massachussets]

The lunar day is 27.53 earth days long, not coincidentally the same period as a lunar month.