Uploaded April 2018 | Updated September 2026, 2 hours ago

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a brief introduction about the origin of my sun-calc spread sheet, it all started with the equatorial mount and how i used the globe geometry to build it. i dont hold physics/astronomy degree , i just used simple highschool math and trigonometry.
the link to last upload of my sun calc drive.google.com/open?id=1BoEv4G_lO6t-cftqG5JUew2iI5o8IaHA

*thanks to wolfie6020 for his many equatorial mount videos
*thanks to John Michaelson for his scientific references which sadly i still can't comprehend