Photographs from lunar orbit show shadows cast by five Apollo flags. The sixth, Apollo 11's, was blown over by the ascent engine as the crew left.

Buzz Aldrin saw it go and said so at the time. The five survivors have had fifty years of unfiltered ultraviolet and no atmosphere, so whatever colour they have now is almost certainly none: the nylon will have bleached to white. The shadows are the evidence — the flags themselves are far too small to resolve.