Image credit: NASA/ESA

Uploader comment: European Space Agency (ESA) astronaut Tim Peake (@astro_timpeake) shared this photo taken aboard the International Space Station on January 11, 2015, during preparations for a spacewalk, or extra-vehicular activity (EVA). Peake wrote, "Final suit fit check prior to Friday's EVA – feels just great! #Principia #spacewalk" On Friday, January 15, Expedition 46 flight engineers Tim Kopra of NASA and Tim Peake of ESA will venture outside the space station’s Quest airlock to replace a failed voltage regulator that compromised one of the station’s eight power channels last November.