ESA astronaut Sophie Adenot on the outside of the International Space Station during an extravehicular activity on Aug. 25, 2026. (Image credit: ESA/NASA)Repairing an engineering marvel like the International Space Station is no easy feat by itself, but it's even more impressive when it's done 250 miles (400 kilometers) up.What is it?In this photograph, European Space Agency (ESA) astronaut Sophie Adenot works on the exterior of the Internationa…