[Suicide Junkie]

Spaceyard rate is in %
One planet with a max population such that it gets no bonuses or penalties, would have 100.0

Spaceyard rate = Chance of Planet * build rate modifier (at max population) for this planetsize

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Planet qualities all average out to the same ((max+min) /2), so they are ignored.

The production rate = Chance of Planet * facility limit * production modifier (at max population)

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The Gas/None stats are what a Vaccuum breathing race would get if they had gas giant colonization tech. All their planets would be domed, but they would still have some facilities/pop/etc.

Unless the mod is fairly extreme, they would also have ice or rock tech, but that is beside the point.