Unplanned Spacewalk Given Green Light to Replace Failed Device | Video

NASA Astronauts Peggy Whitson and Jack Fisher will replace the multiplexer/demultiplexer (MDM) on May 23, 2017. The device controls the functionality of radiators, solar arrays, cooling loops and other Internation Space Station hardware. [Full Story]

credit : Space.com / footage courtesy: NASA / edited by @SteveSpaleta