Astronaut Butch Wilmore conducts a spacewalk outside the International Space Station

iss072e575158 (Jan. 30, 2025) --- NASA astronaut and Expedition 72 Flight Engineer Butch Wilmore works outside the International Space Station during a five-hour and 26-minute spacewalk. Wilmore swabbed external surfaces searching for microorganisms that may survive and reproduce near vents on the exterior of the orbital outpost. The space station was orbiting into a sunset 259 miles above Eastern Europe at the time of this photograph.