Training for spaceflight is intense.
Astronauts go to great lengths to get their bodies ready for the arduous journey from the Earth’s surface to outer space.
They undergo countless medical tests, exhausting physical training, and learn how to conduct the complex scientific experiments required of them once they reach their destination.
At the Johnson Space Center in Houston, Texas, astronauts are training underwater in order to prepare for their time in space – for spacewalks or work outside the space station or other activity outside the spacecraft beyond the Earth’s atmosphere.
The tests include wearing a spacesuit and exploring an underwater model of the space station in order to prepare them for their experience.
Want to see the astronauts in action? Check out these photos of their underwater training session.