One of the often reproduced photographs of something unexplained is this one taken from The Strange & Bizarre - Faked Moon Landings

The conspiracy believers say that - NASA claims the strange shape 'E' in this shot was taken from the Lunar Module while it was 95km above the moon's surface - it is a shadow cast by the Command Module's rocket. But when larger aircraft fly at lower altitudes over the earth, they do not cast such huge and defined shadows.

I say - Absolutely correct! The shadow is cast by the Command module but it is the shadow of part of the attitude correction boosters cast onto the window of the Command module

If you're not sure then take a look at this photograph taken on the lunar surface that shows a similar optical illusion. Spot the booster?

Hum, that wasn't very difficult, now was it!