Expedition 46 On International Space Station

IN SPACE - JANUARY 15: (EDITORIAL USE ONLY) (NO SALES) In this handout image supplied by the European Space Agency (ESA), ESA astronaut Tim Peake takes part in his 4 hour 43 minute spacewalk to replace a failed power regulator and install cabling for the International Space Station on January 15, 2016.The meticulously planned and executed sortie was stopped early after fellow spacewalker NASA astronaut Tim Kopra reported a small amount of water building up in his helmet. The two Tims worked in close cooperation with each other to return to the Space Station, with NASA commander Scott Kelly and cosmonaut Sergei Volkov waiting inside to help them out of their suits. (Photo by ESA via Getty Images)