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So, does anyone have any idea how accurate the sunpos macro is for historic
or prehistoric dates? I am specifically interested in how much error to
expect in the sun's position during the first thirty minutes after sunrise
on the morning of the Winter Solstice, say during year -3000 at the
Also, is there a handy way to determine on which day the solstice occurred
during that year?
I'm hoping to be able to illustrate, with a nice POV-Ray animation, the
exceptional service life of Newgrange during a presentation for my civil
engineering practice course.
Thanks in advance for your help,
-David Wagner
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