So my Veloclock app is telling me that we will be receiving 12hours and 9 minutes of daylight on the Spring equinox, equivalent to about three days of change in daylight hours for my latitude.
I would expect that the number of daylight hours would be closer to an even 12 give or take a minute or two.
What gives?
Equinox and daylight
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Re: Equinox and daylight
#2 
by laklak » Feb 25, 2018 5:30 pm
From Wiki:
On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet. They are not exactly equal, however, due to the angular size of the Sun and atmospheric refraction. The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitive noctis) (night).
On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet. They are not exactly equal, however, due to the angular size of the Sun and atmospheric refraction. The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitive noctis) (night).
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Re: Equinox and daylight
#3 by Scot Dutchy » Feb 25, 2018 5:39 pm
Amsterdam:
Day length on 20-03-18 is 12 hours 10 mins lat 51 degrees.
Day length on 20-03-18 is 12 hours 10 mins lat 51 degrees.
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Re: Equinox and daylight
#4 by laklak » Feb 25, 2018 6:26 pm
12:07:26 of daylight here. The closest to equal is on the 16th, with 12:00:54 of daylight.
A man who carries a cat by the tail learns something he can learn in no other way. - Mark Twain
The sky is falling! The sky is falling! - Chicken Little
I never go without my dinner. No one ever does, except vegetarians and people like that - Oscar Wilde
The sky is falling! The sky is falling! - Chicken Little
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Re: Equinox and daylight
#6 by felltoearth » Feb 25, 2018 6:36 pm
This reminded of this podcast.
“The Sun Also Rises... Over There - This American Life”
https://www.thisamericanlife.org/630/th ... /act-three
“The Sun Also Rises... Over There - This American Life”
https://www.thisamericanlife.org/630/th ... /act-three
Among the things we tend to take for granted: The sun comes up and goes down like clockwork. Except when it doesn’t.
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