4 ms·

Eh, you need to bring water anyway. Stay in the water bubble and you're protected. It's a one-way trip, right?

• greglindahl 10y ago
  That doesn't stop high-energy particles. Neither does lead.
• gizmo686 10y ago
  Does it matter? A space ship is a closed environment, so presumably any water you start with will stay with you in some form or another. There may be some processes that turn it into a less usable form, but I imagine the majority of water would end up as either urine, essentially identical to water for the purposes of shielding, or sweat, which can be recovered as water through the life support system.
  • lolc 10y ago
    The problem is the massive amount of water you would need to create a protective shell. Getting it into orbit and accelerating the whole bubble towards Mars is very expensive and bringing it back probably impossible. But that's no problem if you're going to live on mars, right? Just bring enough water for irrigation.