pair of spacewalking astronauts hooked up plumbing on the newest room of the International Space Station, enabling it to come alive with power Sunday.In this image provided by NASA the Tranquility module is transferred late Thursday evening Feb. 11,...
In this image provided by NASA the Tranquility module is transferred late Thursday evening Feb. 11, 2010 from its stowage position in space shuttle Endeavour's payload bay in the grasp of the station's Canadarm2 to position it on the port side of the Unity node of the International Space Station. Tranquility was locked in place with 16 remotely-controlled bolts. Earth's horizon and the blackness of space provide the backdrop for the scene. (AP Photo/NASA) (AP)
It was the second excursion in three days for Robert Behnken and Nicholas Patrick. They have one more spacewalk to finish installing the Tranquility room and its attached observation deck, the last major building blocks of the 11-year-old space station. Endeavour carried up the pieces last week.
With the throw of a few switches, Behnken and Patrick got ammonia coolant flowing through the hoses, midway through their spacewalk. That, in turn, got Tranquility surging with power; most of its systems could not be turned without a way to get rid of the heat generated by the equipment inside.
It was unwieldy work because of the extra-long hoses and potentially hazardous because of the ammonia coolant.
In fact, frozen bits of ammonia shot out at Patrick as he undid अ
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