Assuming the weather cooperates, the Space Shuttle Discovery is scheduled to launch at 8:38 AM on Tuesday morning. Its goal is to deliver another piece to the International Space Station, specifically the Harmony module, which is one of the two connecting nodes. This one will allow the delivery of the Columbus Laboratory, built by the European Space Agency come December.

This mission will also be rearanging the solar arrays. There will be 5 space walks, the most ever on a shuttle mission to the space station.

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