07-04-2016, 10:26 AM
A possibility that may result from the destruction of the stellar primaries is that any planets formed pre-supernova might have been blasted into bits by the cataclysm(s), and then recycled into new worlds afterwards. A rocky planet with a radius 1.6x Earth or smaller can avoid collecting a hydrogen-helium atmosphere, while maintaining a "reasonably" Earth-like surface gravity.
Radtech497
Radtech497
"I'd much rather see you on my side, than scattered into... atoms." Ming the Merciless, Ruler of the Universe