37 'No proof' US landed on moon. - RT World News ~ Ex-Russian space boss Dmitry Rogozin says that while many in Roscosmos defended Washington’s version of events, no one could produce irrefutable proof. posted 363 days ago by Nightcereus 363 days ago by Nightcereus +38 / -1 41 comments share 41 comments share save hide report block hide replies
It's the geometry of a scattering surface. The angle of incidence gets smaller toward the edge of the Moon, but the actual illuminated area gets broader in inverse proportion, so the apparent brightness is the same out to the edge.