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At lat +50.0 on Jun 21 and lat -50.0 on Dec 21 is the time between sunrise and sunset exactly the same? And so on throughout the parallels and the days of the year?

If not can you explain why? I once read something about the earth's wobble on its axis means that daylight length is not symmetrical north to south.

Joe C
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  • Solstices occur in June & December, there are large differences between daylight hours during solstices. It's more likely that equal daylight hours would occur during the equinoxes in March & September – Fred Aug 30 '16 at 05:58
  • Required viewing: VSauce 'How Earth Moves' – Jan Doggen Aug 30 '16 at 14:46
  • Fred I'm talking about comparing daylight hours between north and south. I'm not asking if the the solstice daylight is longer than equinox daylight. – Joe C Aug 31 '16 at 14:51
  • USNO publishes sunrise/sunset tables, and you could look at these, but they might not be accurate enough for your purposes. You can try HORIZONS as well. I suspect they will slightly different because the Earth's orbit is elliptical, and the perihelion and aphelion nearly coincide with the solstices. –  Sep 01 '16 at 17:46

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