Api

I used it here to determine the relative angle of the sun at one of my favorite spots on the moon: https://api.jodavaho.io/s/readme https://api.jodavaho.io/s/readme The software reads "kernel" files, which are very precise tables of positions over time, shape, etc, and can output just about anything you'd want to know about the layout of the solar system with precision good enough for whatever you'd want.