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> Found the following article interesting and thought I would share it:
>
> http://www.timeanddate.com/astronomy/equinox-not-equal.html

 From a 22 March post:

"Why in the name of all that's holy do you do that yourselves?  There
are only two times a year, and two longitudes on earth that the sun will
be 0 declination at LAN. It will have a lower declination before LAN and
a higher declination after LAN now and vice versa in September, so Hc
and the slope/curve will be affected and not symmetrical.

I went through the trauma of the sea monkey kit being brine shrimp in my
youth.

Then, before cel nav, the belief that the sun would rise exactly in the
east and set exactly in the west; and the day (sunrise to sunset) would
be exactly 12 hours long. I would check out my topo map, find a farm
field(s) with equal elevation miles away, adjust my Silva Ranger for
declination (variation) and wait with my binoculars for sunrise and
sunset. Always disappointed.

Now I know unless there is a bizarre and serendipitous shift in
refraction both at sunrise and sunset it will not happen. Also that I
will not get a pony for my birthday."

http://fer3.com/arc/m2.aspx/Happy-Equinox-Day-BillB-mar-2007-g2453

   

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