13 March 2021, 10:21 am EST By NASA astronaut space walk ( Youtube/UNIVERSE DOPE ) NASA is sending two of their astronauts to conduct the 237th spacewalk outside the International Space Station or ISS on Mar. 13. NASA's ISS maintenance According to CNN, the two astronauts, Victor Glover and Mike Hopkins are scheduled to embark on the fifth spacewalk of the year to carry out numerous system upgrades needed by the ISS. The Expedition 64 engineers are running a bit behind schedule, as they were expected to exit the station's Quest airlock at a little after 7:30 a.m. ET for a mission that is expected to take around six and a half hours. The crew would first stay in the airlock donning their suits before their mission.