unruh wrote:
On 2011-09-21, David Woolley <[email protected]> wrote:
Richard B. Gilbert wrote:
It's unfortunate that the earth DOES NOT rotate exactly 360 degrees in
exactly 24.000000000000 hours. This bit of poor design causes all sorts
It's nothing like it. It out by approximately 1 degree a day!
well, not if you define the rotation with respect to the "mean sun"
rather than the stars. Then it is only out by a few PPB.
It makes a big difference for GPS, though. I believe their orbital
period is half a sidereal day, not 12 hours or even 43200 TAI seconds.
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