NASA astronaut Chris Cassidy works during a six-hour spacewalk.
The International Space Station’s power system is heavily dependent on its batteries. The month of July saw the power spacewalk series to increase the Station’s efficiency drawing to a close.
NASA astronauts Chris Cassidy and Bob Behnken performed the 11th spacewalk in a three-and-a-half-year effort to upgrade the International Space Station’s power system.
Less in more, and the replacement programme cut down the old 48 nickel-hydrogen batteries to 24 lithium-ion new ones.