Reuters: Visiting shuttle Discovery astronauts on Friday unfurled the new solar panel wings they installed onto the International Space Station, allowing it to generate full power after a decade of construction. Working inside the station’s Destiny laboratory, the astronauts extended two sets of panels that had been folded up like accordions inside flat metal boxes. The 31,000-pound (13,950-kg) girder containing the boxes was installed during the Discovery crew’s first spacewalk on …