Re: accruate "sundials"


<geraldkelleher@xxxxxxxxxxx> wrote in message
news:1118603742.967046.193160@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

>
> The Earth's axial rotation through 360 degrees is a single event
> because it is an independent motion,as you are rotatintg with that
> rotation (which generates terms such as dawn,noon and dusk) you have no
> choice in the matter is assigning two values for that rotation through
> 360 degrees.
>

But why do we _have_ to measure this rotation against the sun?


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