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The next possible launch attempt will be Monday at 4:14 a.m. EST, although the weather will have to be evaluated overnight Sunday, NASA said on its Web site.

Cmdr. George Zamka was tapped to head Endeavour's STS-130 mission to the International Space Station, with Terry Virts as pilot in his first trip into space. Astronauts Nicholas Patrick, Robert Behnken, Stephen Robinson and Kathryn Hire will also be aboard the Endeavour.

The Endeavour will deliver a third connecting module -- the Italian-built Tranquility node and a seven-windowed cupola to be used as a control room for robotics. Three spacewalks are scheduled during the mission.

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