Yeah, the radiation was partly why I wrote "capable of sending people". You'd probably need quite a few metres of water ice surrounding your livable space if yo

Yeah, the radiation was partly why I wrote "capable of sending people". You'd probably need quite a few metres of water ice surrounding your livable space if you don't want to get fried. Which makes me wonder: if a ship was covered in, say, 10 metres of ice, would the top layer get irradiated and thus need to be replaced every so often? I wonder if it was left exposed to space, would the water ice sublimate away? Then "all" you'd need to do is replace the top layer. Humans safe behind ice while robots do the work isn't quite as romantic as The Expanse but it'll get the job done!