Thanks for the comment.

As far as large space habitats go, I did not include those here as I was trying to focus more on the planets/moons themselves, not to mention the fact that radiation protection will probably become a “standard” built into those habitats.

While I am generally optimistic about colonizing our solar system, I try to highlight some of the potential pitfalls and challenges, as its a good way to help find realistic solutions facing future colonists. (example: your water tanks with dense glass windows is something that I have never thought of before)

Anyways, take care!

~Darnell

There certainly are radiation shielding concepts based on magnetic and/or electrostatic fields. E.g. the NIAC funded several such studies like this one-
tinyurl.com/38wo3h
These designs typically involve very high fields to protect a relatively small volume like a spacecraft or small surface habitat from both solar and GCR. Most practical systems would still require supplemental material shielding for the latter.

“While radiation can be countered by using water, lead and aluminum, parents may be hesitant to breed upon foreign planets and moons (let alone raise kids upon them) if it will result in their children acquiring serious birth defects.”

There is no fundamental reason that habitats cannot use material shielding to reduce dosages to the levels at the earth’s surface (though for the sake of cost-effectiveness, it might be that of the surface at Nepal). So there would be no more birth defects induced there by radiation than on earth.

This doesn’t necessarily require a cave-like existence since light piping along with water tanks with dense glass windows could be used to bring it sunlight and still maintain excellent radiation protection. (Visit one of those large aquariums where one can walk under a tank to get an idea of the sort of light this would provide.)

I note that you don’t include large scale in-space habitats like those proposed by Gerard O’Neill as potential off-earth colonies. I don’t want to argue here about their feasibility (I believe they hold much greater potential for off-earth settlements than planetary surfaces). However, I will note that those designs used material shielding to attain earth level radiation dosages.

So the bottom line is that I urge you to be less pessimistic about rad protection for our brave space colonists.

- Clark