In our last post, we explored how to find the angular distance around the horizon from the ecliptic and celestial equator. In this chapter, we explore another value that can be derived from knowing the length of the longest day (i.e. on the summer solstice): the elevation (or altitude) of the celestial pole (which is also the latitude).
Once again, we’ll start with the same diagram we’ve been using for awhile now:
Continue reading “Almagest Book II: From Length of Longest Day Finding Elevation of the Pole”