Here's a entertaining (perhaps not entirely useful) star system generator I found over on - the 'Realistic' Star System Generator. It made me laugh.

@ng76 I think I might actually use this for fleshing out some Traveller systems. Occasionally I want to use the GURPS Space generator to give star systems some more depth and shape, but it takes some real effort to do that. world gen doesn't give much for the world.
In the past I've supplemented sector gen with Near Space rules. Cepehus Engine SRD rules come with extra info for determining how many asteroid/comet/planetoid belts there are in the system & how many gas giants there are.

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