ESA’s Astronaut Corps currently consists of seven active members from Denmark, Germany, France, Italy and the United Kingdom. Pictured are the ‘Class of 2009’, from left to right: Andreas Mogensen, Alexander Gerst, Samantha Cristoforetti, Thomas Pesquet, Luca Parmitano, Tim Peake. Missing from the picture is Matthias Maurer, who formally joined ESA's astronaut corps in July 2015.