I found this- but no mention of mercury. https://www.space.com/5628-nasa-envisions-huge-lunar-telescope.html https://www.space.com/5628-nasa-envisions-huge-luna

I found this- but no mention of mercury. https://www.space.com/5628-nasa-envisions-huge-lunar-telescope.html https://www.space.com/5628-nasa-envisions-huge-lunar-telesco... Diffrent solution entirely- dont build a mirror- build a fragment, and rotate it with a counterweight along a axis?