Water is also effective at blocking radiation [0][1], making it especially useful when stored around the spacecraft occupants. [0] https://www.quora.com/Can-we

Water is also effective at blocking radiation [0][1], making it especially useful when stored around the spacecraft occupants. [0] https://www.quora.com/Can-we-use-water-or-ice-as-radiation-shielding-in-space https://www.quora.com/Can-we-use-water-or-ice-as-radiation-s... [1] https://www.nasa.gov/pdf/284275main_Radiation_HS_Mod3.pdf https://www.nasa.gov/pdf/284275main_Radiation_HS_Mod3.pdf (page 4)