I find this website very helpful for visualizing the changes in daylight over time and latitude.
Daylight Hours Explorer http://astro.unl.edu/classaction/animations/coordsmotion/daylighthoursexplorer.html > On Feb 3, 2015, at 3:36 PM, sundial-requ...@uni-koeln.de wrote: > > OK, I would also like to take a turn and ask a question to the mathematically > inclined: > > I have been trying to figure out how to plot the duration of daylight over > the course of the year as a function of latitude. (I would generate a curve > for each latitude I am interested in.) > > I believe the result should be a sine curve which looks comparatively flat at > the equator, growing increasingly steeper until the polar circle, where it > would turn into a binary step curve and the six month day turns to six month > night -- leaving aside physical effects like refraction. I am particularly > interested in the slope of the curve around the equinoxes at northern > latitudes, when the transition from long summer days to short winter days is > quite abrupt. > > Jack Aubert --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
