NASA Space Station Tour (2012)

Most of the modules in the International Space Station have four sides and they’re put together that way so the people can work on a flat plane; wall, floor, another wall, or the ceiling. All you have to do is turn yourself around and your reference changes. People always ask about sleeping in space. Do you lie down? Not really, because it doesn’t matter. You don’t have the sensation of lying down, so you just sit in your sleeping bag.

The sleeping stations are like phone booths, but pretty comfy and you can sleep in any orientation in them. Astronauts don’t have any sensation that tells them that they’re upside down. In the same time sleeping booths are small offices with a laptops, toys, books, and clothes in them.