NASA Astronauts train for spacewalks in America’s largest pool, the Neutral Buoyancy Lab. To simulate microgravity, they practice underwater using a full-scale replica of the space station. Astronaut Anne McClain describes a spacewalk as “hanging off a cliff and performing brain surgery at the same time.” Credit: Smithsonian | National Astronaut Day

A 360-degree immersive VR viewing experience, featuring exclusive astronaut training footage from NASA’s Neutral Buoyancy Laboratory (NBL) in Houston, Texas. | Cosmoknowledge

NASA astronaut Peggy Whitson demonstrates how to suit up for space during training at the Neutral Buoyancy Laboratory. Recorded on July 24, 2015, the sequence shows how a spacesuit functions as a complete life support system, providing oxygen, temperature control, power, communications, and even emergency propulsion before astronauts ever leave Earth. Follow @spaceeves #Spacesuit #AstronautTraining #NASA #HumanSpaceflight | SpaceEve