There are 2 repositories under planet-generator topic.
A procedural planet generator addon for Godot with terrain LOD.
PlanetTechJS is an open-source JavaScript library built using vanilla THREE.js, for creating and editing planets at scale
Pure Java random generator for planets
Planetary system formation simulation in your browser, or on the server.
Fine-tuning stable diffusion to generate planet/moon textures.
A python program for procedurally generating planet-scale maps for Earth-like, spherical worlds.
a Unity script for procedurally generated 3D planets
HTTPS mirror of Torben Mogensen's planet generator along with modifications I and others made
Planet Generator with OpenGL rendering using Visualization Library