F is for Flag

It's an iconic image, isn't it? The Stars and Stripes on the moon.

Except, you won't see this if you go there now.

NASA has now confirmed any American flags that are still in situ on the moon are now totally white.

According to lunar scientist Paul Spudis:

For forty-odd years, the flags have been exposed to the full fury of the Moon's environment – alternating 14 days of searing sunlight and 100° C heat with 14 days of numbing-cold -150° C darkness. But even more damaging is the intense ultraviolet (UV) radiation from the pure unfiltered sunlight on the cloth (modal) from which the Apollo flags were made. Even on Earth, the colours of a cloth flag flown in bright sunlight for many years will eventually fade and need to be replaced. So it is likely that these symbols of American achievement have been rendered blank, bleached white by the UV radiation of unfiltered sunlight on the lunar surface. Some of them may even have begun to physically disintegrate under the intense flux.

The NASA website about this can be read here.