Math Refresher Books

When I started the first page of Spherical Astronmy by Robin M Green, I realized I couldn’t remember any of my high school math.  Wow, I remember being so good at math!  I took AP Calculus in high school and know can’t remember what a cosine is. So, I searched around Amazon and found a […]

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Astronomy Calculator Reasons and Goals

Astronomy Calculator was an inspiration.  Unfortunately, I get remember the exact circumstances for that inspiration. One part probably has to do when I was brainstorming about building mobile astronomy apps and realized it would be cool to display the time of sunset.  I did some Google searching and couldn’t find a service that I could

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