I don't think you fully grasp the concept of sideral time, here is a wiki link http://en.wikipedia.org/wiki/Sidereal_day From a persons point of view on earth sideral time means the angle at which you would have to be standing to view each constellation. The THREE pyramids are said to be a sideral clock but that hasn't been proven it's just speculation because the 3 pyramid tops point at certain angles into the sky. Sounds like you have been buying into a little to much of the 2012 garbage.

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