How many in Goldilocks zones with stable orbits for billions of years? With non-toxic soils and atmospheres? With water at the surface and in significant amounts?
Now, how many can humanity reach in the life time of frozen embryos?
And if it's more than 30% bigger then escape velocity is likely beyond the practical limits of science.
Now, how many can humanity reach in the life time of frozen embryos?
And if it's more than 30% bigger then escape velocity is likely beyond the practical limits of science.