The Year 2323

[Stevicus]

You could visit such a thing at a carnival. That technology existed 100 years ago.

That reminds me of a ride I went on at Magic Mountain when I was a kid. It was called the Spin Out, if I recall correctly.

I don't think I could endure such a ride today.

 

[Heyo]

The power to turn a km radius habitat would be enormous, only the periphery would have the required gravity

Yep. But in space you only have to do it once, the rest is conservation of angular momentum. And in a torus or O'Neil cylinder, you do live mostly on the inside of the outer rim. On a moon or planet, you'd probably only visit the merry-go-round for sleep, exercise or therapy - if at all. We don't have data how the body reacts to low gravity. Micro gravity is detrimental to our health but 1/6 g may be fine.

 

[Mock Turtle]

You could visit such a thing at a carnival. That technology existed 100 years ago.

That brings back memories, given we had one of these, I think at Battersea in London, and where we did all have a go on it. Most amusing.