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    Re: Moon photo
    From: Frank Reed
    Date: 2012 Aug 4, 07:27 -0700

    Unlikely, yes. But not unreal. It either took some careful planning, which is quite possible given that it's the Olympics, or some good luck, but the scene is quite plausible.

    One trick, of course, is that this is a telephoto shot or an enlargement of a high-resolution image or both, which is why the Moon looks huge. I would say the photo was taken from the southern end of London Bridge about 2800 feet west of Tower Bridge. Each of the Olympic rings is said to be about 25 feet across which would imply an angular diameter of about half a degree at that distance --just about right to match the Moon's apparent size. The Moon's phase (a day past full) and orientation are also reasonable (the Moon's equator is tilted about twenty degrees towards the upper right which is consistent with the orientation of the ecliptic in that latitude at this time of year). The Moon is slightly flattened, again consistent with its low altitude. In fact, the astronomical details of a photo like this are so specific that we could figure out the photographer's location within a few feet and the time of the photo within a fraction of a minute (the photographer's height being the only real limiting factor on the timing). I would say that the photo was taken right around 9:08 pm (Summer Time/Saving Time) in London from London Bridge very close to these coordinates: 51d 30' 25.6" N, 0d 5' 16.6" W (+/-0.5").

    There's one other detail to check for consistency. It appears to be low tide. :)

    -FER

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