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I would like to calculate the angle formed by the sun and the horizon for any hour of the day and any day of the year for a particular place on Earth. So like: what is the angle of the sun to the horizon at 11AM on June 21 at Chicago? (Sorry, I'm a newbie, and don't even know what the name of this angle is). Is there a formula for calculating this? Thanks!

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  • $\begingroup$ Here's a calculator that finds the elevation angle of the Sun for a given place and time. Works for years 1900–2099, though. Another calculator doesn't seem to set a limit on the year. Solar elevation is the name for the angle you want to know $\endgroup$ – Yellow Sky Jul 28 '20 at 5:59
  • $\begingroup$ The formulas needed are here: en.wikipedia.org/wiki/Position_of_the_Sun $\endgroup$ – Yellow Sky Jul 28 '20 at 6:15
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    $\begingroup$ @YellowSky I think your comments have enough material for a proper answer. $\endgroup$ – Mike G Jul 28 '20 at 14:35
  • $\begingroup$ Excellent! Thanks, exactly what I was looking for. $\endgroup$ – Mark Polczynski Jul 30 '20 at 13:36

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