My protagonist is an astronomer in a fantasy world.
Ideally, what I want is software where I can specify some properties of this planet, e.g. orbital and rotation period, nearby stars, number of moons, and then visualise what someone would see from the planet's surface.
All the software I've found while searching visualises the real universe, whereas I want some kind of sandbox mode.
If this doesn't exist, can anyone guess what kind of tech stack I could use to build something basic myself? I am a Python engineer, but very inexperienced.