Four ESA astronauts are currently training at NASA’s Johnson Space Centre in Houston, Texas. For ESA’s newest astronaut Matthias Maurer, it’s been a chance to inspect a mock-up of NASA’s future space vehicle Orion alongside Tim Peake and Luca Parmitano, both experienced astronauts. Tim and Matthias have undergone spacewalk training in the neutral buoyancy pool. Alexander Gerst is also at JSC, training for next years long duration mission to the ISS.