Questions tagged [xephem]

I'm calculating the longitude of positions where the current sun altitude currently is ~0.0. This is done by iterating over a range of latitudes, calculating the time of sunrise at (0.0, latitude) and then calculate the longitude by multiplying the…

I'm trying to make a program that displays stars of my choice, from different locations on Earth and at different epochs. I've got it working so that I can display objects from ephem's database, such as Venus, but the stars I want to display aren't…