re: re:Telescopes in space
Yes, there's a lot fo dust on the Moon, but there's a lot of it on Mars too, combined with wind, which the Moon doesn't have.
There's the argument about using ESL2 for astronomy, rather than the Moon.
It should require less Delta V to get to L2 than the surface of the Moon.
But what about keeping the telescope protected from the Sun?
How effective can an artificial shield be (not attached, I suppose, to the telescope) compared to the natural shield of the Moon?
Raoul