Learning from Elite about procedural generation. But as a Culture ship that can jump anywhere, and doesn't have to worry about being in combat.
Procgen planning done in Python, partly to learn how to Python: https://github.com/mtg101/procgen_register8_py And it's gone a long way beyond that Python planning of procgen text and numbers.
We have planets with colourful gfx, plasma-nebulas in the bg, and theme tunes for each system!