Two of Discovery's astronauts floated outside their spacecraft Monday with one key task: to replace a failed washing-machine sized spinning wheel, which along with three other gyroscopes helps to steer the International Space Station. Astronauts Stephen Robinson and Soichi Noguchi planned to spend 6½-hours replacing a broken down 660-pound (300-kilogram) gyroscope, which failed in 2002. ""Is it day or night out there?" Robinson asked minutes before the two opened the orbiting shuttle's airlock. "You are going to be going out into the bright sun," astronaut Andrew Thomas told Robinson before telling Noguchi it was time to space walk. "I will just push on your toes a little bit here," Robinson told his space walking partner as Noguchi exited the airlock over Asia. "Out you go." Robinson followed. During their first space walk Saturday, the pair restored power to another gyroscope, which had stopped spinning in March. "Being outside was the most incredible experience I've certainly ever felt so far, and I almost can't believe we get to do it again," Robinson said Sunday as he prepared for his second orbital outing, according to a report of The Associated Press.
