Paolo Nespoli, Roberto Vittori, Mike Fincke, Drew Feustel, Greg Chamitoff, Greg H. Johnson, Reinhold Ewald, Leopold Eyharts, Frank De Winne, Michel Tognini, Hans Schlegel, Christer Fuglesang, Luca Parmitano, Andreas Mogensen and Alexander Gerst, September 18, 2011, Cologne, Germany (Credit: Tomas Pribyl);

LEFT: Alexander Gerst, September 20, 2009, Cologne, Germany (Credit: Christoph Kaspari);

Thomas Pesquet, Timothy Peake, Luca Parmitano, Andreas Mogensen, Alexander Gerst and Samantha Cristoforetti, June 16, 2009, Paris, France (Credit: Jacques van Oene);