“The biggest thing with falling asleep in space,” says Mike Hopkins, who returned from a six-month tour on the Space Station…

“

“The biggest thing with falling asleep in space,” says Mike Hopkins, who returned from a six-month tour on the Space Station last March, “is kind of a mental thing. On Earth, when I’ve had a long day, when I’m mentally and physically tired—when you first lie down on your bed, there’s a sense of relief. You get a load off your feet. There’s an immediate sense of relaxation. In space, you never feel that. You never have that feeling of taking weight off your feet—or that emotional relief.” Some astronauts miss it enough that they bungee-cord themselves to the wall, to provide a sense of lying down.

Sleep position presents its own challenges. The main question is whether you want your arms inside or outside the sleeping bag. If you leave your arms out, they float free in zero gravity, often drifting out from your body, giving a sleeping astronaut the look of a wacky ballet dancer. “I’m an inside guy,” Hopkins says. “I like to be cocooned up.”

–5,200 Days in Space (viaiamdanw)