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> Gary writes:
> 
> It's actually 15.041� per hour (15� 2.5') approximately 361� per solar day.
> 
> Bill wrote:
> 
> As understand it, with an earth rotation of 15d per hour, 1 second time
> equals 0.25 arc minute.  It follows that 4 seconds time would equate to 1
> arc minute. 

By the NA, Explanation pg 255, Sun and Planets 15d precisely,  Aries 15d
02'.46 (15d 02' 27".6). Cel nav as I see it is based on a geocentric model
with a mean solar day.

In my time zone, it is Friday so I must be on Earth. I stand by a mean 15d
per solar hour.

Perhaps in your time zone you are not on Earth, so able to view the motions
of our spiral arm of the Milky Way galaxy from a different vantage point.
(Or an acid flashback?)

In which case, you would see the Earth over rotate by approx. 1d per day and
make nominally 366.25 rotations per earth year. Which it turns out is handy.
If, in relationship to the sun, earth rotated 360d per 24 hours, halfway
through the year LAN would be totally dark.  Which upsets the milk cows much
as the extra hour of daylight from daylight-savings time burns the lawn and
causes it to become brown unless watered--which drains off the supply of
water for hydroelectric dams and causes brown outs in the home. A bugger.

Boy, did I pick the wrong day to stop huffing non-dairy whipped topping!
(Please give me pass on this one George.)

Bill B. 


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