Now, I decided to spice things up a bit. I prompted for 4 planets and made it science fantasy (combining magic and science). This is the result.
I was testing to see how good AI is at world-building. This is the result, but I've heard that Dwarf Fortress (which I never played) is also able to create backstories for it's generated locations.
But I've noticed that the created solar system has a planet that is LARGER than Earth yet has WEAKER gravity.