maybe them aliens made the system up, so that it doesn't fall apart under its own gravity. Makes sense: just increase the habitable area by bringing in smaller

maybe them aliens made the system up, so that it doesn't fall apart under its own gravity. Makes sense: just increase the habitable area by bringing in smaller planets into the goldilock zone - that might come out cheaper then to go interstellar. Maybe lots of planets that circle the same star over the same orbit would be a better indicator of alien activity than a dyson sphere.