A U.S. and a Japanese astronaut ventured out of the International Space Station (ISS) Friday, in the second of two spacewalks conducted this week to complete upgrades and repairs to the orbiting outpost.
 
NASA Flight Engineer Kate Rubins and Japan Aerospace Exploration Agency (JAXA) astronaut Soichi Noguchi, have a number of tasks on their agenda, including venting ammonia from the Early Ammonia System and complete installing support frames for new, high-efficiency solar panels, a project begun during a spacewalk Sunday.
 
Friday’s spacewalk is the fourth for both Rubins and Noguchi in their astronaut careers, and the 236th in the ISS’s 20-year history.
 
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