Spacewalker Christina Koch works 256 miles above the Atlantic Ocean

iss061e129986 (Jan. 15, 2020) --- NASA astronaut Christina Koch is pictured working in the vacuum of space 265 miles above the Atlantic Ocean off the coast of Africa. She and NASA astronaut Jessica Meir (out of frame) conducted a spacewalk to install new lithium-ion batteries that store and distribute power collected from solar arrays on the station’s Port-6 truss structure.