lcb

Why is the accuracy error of my calculation results so large? Especially the moon.

5

> Astronomy Engine is designed to be small, fast, and accurate to within ±1 arcminute. It is based on the authoritative and well-tested models [VSOP87](https://en.wikipedia.org/wiki/VSOP_(planets)) and [NOVAS C 3.1](https://aa.usno.navy.mil/software/novas/novas_c/novasc_info.php). Is...