(September 5th, 2012) Astronauts float 250 miles above the Earth to install a new power system unit outside the International Space Station.

(Telegraph) Toting homemade brushes and bags of tools, two astronauts left the International Space Station (ISS) on Wednesday for a second spacewalk to try and install a new power system unit. Lead spacewalker Sunita Williams and Japan's Akihiko Hoshide floated outside the station for the second time in a week, hoping to resolve a problem that left a replacement power router tethered to its attachment plate.

Nasa hopes that a thorough cleaning of the bolts and their housings will resolve the problem, though engineers came up with 15 pages of options and procedures. The ISS, a project of 15 countries that flies about 250 miles above Earth, is staffed by rotating crews of six astronauts and cosmonauts and used for dozens of medical, materials science, physics and other experiments.

http://www.telegraph.co.uk/science/space/9523440/Nasa-astronauts-embark-on-spacewalk-to-repair-ISS-power-system.html

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