Saturday night just before 8 p.m. Eastern time, some 200 miles above the Earth’s surface, a circuit breaker tripped: No one on board the International Space Station is in danger, but the outpost is now one cooling loop down. NASA said in a statement that they are planning an emergency spacewalk to fix this part of the station’s cooling system later this week.
The cooling loop moderates the station’s temperature and regulates other station avionics controls, by keeping cooling ammonia circulating through it. Without any cooling system, the three Americans and three Russians currently on board might find conducting research difficult:
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