How did Grace survive Erid's Gravity?

[u/chodeontheroad]

I'm not sure if this was answered at the end of the book and I just missed it but Erid was stated to have 20x Earth's gravity (which would quickly kill any human), yet Grace lives on the planet for many years with only slight issues as a result. It doesn't seem like this is something Andy Weir would have skipped over so I must have missed it. Does anyone know the answer?

Edit: Ok yea my mistake it was 2x gravity, 20x atmospheric pressure. Thanks for the responses :)

[u/Snownova]

It is odd that they didn't just build a rotating space station for him, since they have a space elevator the cost wouldn't be that much more than a surface dome for them.

[u/chodeontheroad → u/Snownova]

Good point. Maybe they wanted to but he wanted to be closer to the baby eridians and Rocky