> "Water would be a big part of the space coach's body, too, according to the study. Packed along the habitat modules, it would provide good radiation shielding

> "Water would be a big part of the space coach's body, too, according to the study. Packed along the habitat modules, it would provide good radiation shielding." erm… doesn't that mean that once you use the fuel (water), your radiation shielding is gone?