zero-g repair job -- on the Hubble Space Telescope Servicing Mission #4. Miles says: ------------ Astronauts spend a lot more time training for missions than flying in space. But I wouldn't feel sorry for them as the training is an amazing adventure unto itself. They practice in airplanes that fly a roller-coaster pattern to give them brief stints of weightlessness (the so called Vomit Comet); they get to zoom around in supersonic T-38 training jets; they fly approaches to shuttle runways in ...