One in a series of X-Rays currently on display at the Smithsonian National Air and Space Museum's "Suited for Space" exhibit, this unusual view gives the observer a peek inside an experimental space suit designed in the late sixties.
Via National Geographic:
Cathleen Lewis, a historian and curator of International Space Programs at the museum, explained that the coils located where elbows and knees would be were designed to help astronauts move their joints in their pressurized suits in outer space.
"The shoulder area allows astronauts to localize air displacement and restrain the pressurization," she said. "The joints were designed to automatically localize the displacement of air."
In other words, if an astronaut lifted his or her arm in space without these specialized joints, the arm would balloon up—making it impossible to do work.
Visit National Geographic for more information and beautiful space suit X-rays.