ESA astronaut Samantha Cristoforetti training for spacewalks in NASA’s Neutral Buoyancy Laboratory in Houston, USA. Diving underwater is as close as it gets to experiencing weightlessness on Earth for long periods of time. To simulate floating in space, astronauts don the suits before being lowered into a large diving pool. Should future missions require Samantha to venture outside the International Space Station to install new equipment or collect samples, she needs to know how to use spacesuits.
Photo credit: NASA/ESA