Two Astronauts to Make Friday Trek to Edge of Space Station

On November 13, 2015 - Friday the thirteenth, for the superstitious - one of the International Space Station's eight power channels went dark. A multitude of systems, including the laboratory's guidance and navigation controls, switched to backup power. Working through the weekend, teams at Mission Control in Houston discovered the culprit was likely a failed Sequential Shunt Unit, which regulates power flowing in from a pair of the station's solar arrays. More

(Source: The Planetary Society - Jan 14)