Roger Bailey wrote:
(snip)
>As further follow up I'd like to show what a powerful little equation the
>sunrise formula is: Cos t = - tan d * tan L.
(big snip)
>Remarkable. This equation deserves to be on a tee shirt, the ultimate
>honour for science trivia! I can just picture it arching over a glowing
>sunrise graphic.
4Mar98
Hi Roger,
Thanks so much for your mini-essay on the half-day length formula. I
hadn't realized it was that versatile. Put my name on your order list for
one of those tee shirts. No kidding, I want one. Size XL.
Stay well,
Mac Oglesby
