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These planets would be similar in size to Earth. Mars and Venus don't need to exist in this scenario. So how many Earth-like worlds can be squeezed into the sun's "goldilocks" zone? Mars and Venu...
These planets would be similar in size to Earth. Mars and Venus don't need to exist in this scenario. So how many Earth-like worlds can be squeezed into the sun's "goldilocks" zone? Mars and Venu...