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Celestial Coordinates and Sun's degrees below horizon

The vernal equinox is defined as the time the Sun's DEC changes from south to north. At that time the Sun is directly over some point on the equator. If it's 2;30 on your watch and you happen to be in ...
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Azimuth angle and elevation angle of a heliostat mirror

As I said in my comment, you appear to be using an Azimuth system different from what most astronomy programs will return it in. As long as you're consistent, it won't matter, but double check to ...
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How do astronomers know when the Sun will die?

The expected longevity of the Sun is derived from stellar models. Stellar models incorporate all the thermal and nuclear physics we know about how compressed gas at high temperatures will behave. ...
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Determining when the sun shines on different sides of a building using astropy

The code below will give you the alt-az coordinates for any specified location for any specified time. From there, I think the easiest method to determine which side of the house it will hit is to ...
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