When it comes to space exploration, most don’t take into consideration what it’s like to sleep in a weightless environment. The sleep station for astronauts is a little bigger than a closet, and features a sleeping bag and laptop strapped to the wall. It’s a bit different than the cozy mattresses we have on Earth, but according to Mike Massimino, a former NASA astronaut, it’s like “a big slumber party.” He says the trick is to remember to strap the sleeping bag to the wall so your body won’t drift around during the night. However, even when strapped in, astronauts’ arms tend to float out in front of them while they sleep, making them look like tired zombies. As strange as it sounds, it’s commonplace and Massimino says it’s just the reality of space sleep. Learn more here.