'Walking' in the vacuum of space, astronaut Terry Virts on the International Space Station (ISS) is seen working to complete a cable routing task while the sun begins to peak over the Earth's horizon on Feb. 21, 2015. Virts and fellow astronaut Barry "Butch" Wilmore completed a 6-hour, 41-minute spacewalk routing more than 300 feet of cable as part of a reconfiguration of the station to enable U.S. commercial crew vehicles under development to dock to the space station in the coming years. Virts and Wilmore will start their second spacewalk at 7:10 a.m. EST on Wednesday. Image Credit: NASA #nasa #iss #space #spacestation #astrobutch #exp42 #launchamerica