[Spaceships] SM+35 Toroid Station?

[AlexanderHowl]

You could have counter rotating habitats connected by a stable structural element. You would need such an element anyway to anchor solar panels, shades, mirrors, etc.

On a more serious note, do we need a hollow object that is 95% trace atmosphere? If you constructed multiple levels, you could have g's ranging from .1 to 1.0 without difficulty. You could have each with 20 km separation and just have a rotational radius of 200 km. You could have four counter rotating habitats, each with a rotational radius of 200 km and a length of 1,000 km, each with ten levels connected, all connected by a static structural element.

In that type of setup, you would end up with an effective projected area of around 27 million square kilometers. The counter rotation would keep everything pointed in the right direction. Of course, that would be more complex than the first design.