Yes I was having a laugh, no wind on the moon!After all this time -since 1969 -I was only 2 when that happened so I wont have seen it although like everyone -know it happened.
Bet that its got tons of holes in it though if it s flapping in the wind - there woudnt be any wind on the moon would there??
I guess there is a big question of what role solar activation of various air molecules plays in the decay of nylon or other flag materials. Is it direct UV breakdown of polymer bonds or is it "oxidation" by ozone or other ionized air molecules/atoms? If air molecules are the key driver then the lack air may have protected flag against UV. Dark colors in direct sunlight might then become a question though not for burning.Normal nylon would not fair well after 50 years of unfiltered UV. Our nylon gazebo bleached and lost strength in only 8-9 months of Texas late summer fall and winter sun.