Germany’s Matthias Maurer and the Raja Chari of the United States have returned to the International Space Station (ISS) from their seven-hour spacewalk mission. Live footage shared by the US space agency NASA showed the two men re-entering the ISS via an airlock on Wednesday evening. The the two astronauts had left the ISS to attach new tubes to a cooling system, replace a camera, and attach an electricity and data connection on the external European research platform “Bartolomeo.” Spacewalks are physically very demanding and require very detailed planning. The mission was 52-year-old Maurer’…