Watching the sky from the moon

 I'm a huge fan, conceptually, of building a giant telescope on the moon. There's now a new paper that introduces the hypertelescope concept...which is a basic optical telescope built in a crater. This would be a huge visual light observatory protected from light pollution and atmospheric distortion.

I still prefer the idea of a radiotelescope, though.

At this point, though, we almost certainly will build some kind of observatory on the moon.