Exploring Spherical Coordinates on Windows Phone

摘要

Ever since I became acquainted with the Motion sensor in Windows Phone 7.1, I've known exactly what I wanted to do with it: resurrect some C# positional astronomy code I wrote about five years ago and wire it up with Motion sensor logic into a Windows Phone program. Such a program would allow me to point the phone at a spot in the night sky to show the planets and constellations located there. That program-with the ridiculous name Astro Phone-is coming in the next installment of this column. Meanwhile, some conceptual, mathematical and programmatic groundwork is necessary.