[AZ-Observing] Re: APOD picture of the duh Peaks

     It's just occurred to me that the Duriscoe shot of the Peaks
_must_ be a composite.  The reason simply is that Earth still spins:
you can't get a sky shot that deep without having the foreground
smeared out from trailing at least a little bit.  So there might
be just two shots taken back-to-back---maybe the slight trace of
illumination on the cloud-cap isn't from the east side of Flagstaff,
but instead from a bit of morning twilight.


\Brian
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