"Of course not," I replied. "It’s a rotating structure, one hundred henn in radius, composed of segments each one thousand henn in length. The ratio is clearly artificial. The experiment to determine the rotational period is something we did in our first-year classes. It’s exactly what you’d need in order to generate .86 G." I was taking a chance showing any scientific chops, but I wanted Theresa to approve of me. Not just because she appeared to have a ferocious intellect, but also because I might learn something useful. This could turn out to be the first truly useful encounter since we’d landed.