NASA began the countdown on Monday for the upcoming launch the space shuttle Columbia on a mission to upgrade the Hubble Space Telescope. If all goes well, Columbia will lift off from the Kennedy Space Center on February 28 at 1148 GMT (6:48am EST). Over the course of the 11-day mission, astronauts will carry out five scheduled spacewalks to install new hardware, including a new camera, solar wings, a power-control unit, and steering mechanism. Forecasters are expecting a 70% chance that the weather will be good enough for launch.
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