Thread: The Equinox
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Old March 19th 09, 02:35 PM posted to uk.sci.weather
[email protected] tudorhgh@aol.com is offline
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Default The Equinox

On Mar 19, 11:40*am, "Jack )"
wrote:
"Equation of time" is the thing to plug into google,
I must do that sometime and try and get my head around what is going on
with the equinox, day lengths and when sunrise/sunset happen.


"Equation of time" has NOTHING to do with refraction but is a result
of the ellipticity of the Earth's orbit.

Jack


And the tilt of the earth's axis. The two effects are about
equal but the axial tilt effect has a period of 6 months whereas the
eccentricity effect has a period of one year.

Tudor Hughes, Warlingham, Surrey.