Space Shuttle Endeavour was carried from Launch Pad 39B at Kennedy Space Center to Launch Pad 39A in preparation for a nighttime launch at 7:55 p.m. ET Nov. 14 on the 15-day STS-126 Mission to the International Space Station, NASA announced.

The seven-hour trip from pad to pad, at less than 1 mph, had been scheduled for Saturday, but bad weather forced a postponement.

Moving Endeavour to Pad 39A received a green light after shuttle program managers, wrapping up a two-day meeting, determined that the spaceship is ready to fly.

While the Nov. 14 launch date is the target, the firm date will be set at the end of a flight readiness review meeting set for Oct. 30-31.

Endeavour had been sitting poised at Pad 39B, and Space Shuttle Atlantis had been sitting at Pad 39A, with the plan that Atlantis would launch on the STS-125 Mission to repair and refurbish the Hubble Space Telescope.

It was the first time in years that two space shuttles had been on launch pads simultaneously.

Had that Atlantis mission lifted off as scheduled two weeks ago for the mission to the Hubble, Endeavour would have remained on Pad 39B, ready to roar to the rescue if Atlantis developed serious problems during ascent or while in orbit.

But the Hubble developed a glitch that forced NASA to postpone the Atlantis mission until February, or later.

With no lifeguard duty to perform, that in turn freed Endeavour to execute the STS-126 Mission, a logistics trip in which the shuttle will lug an immense 19,000 pounds of cargo to the space station.

That immense cache of supplies is tucked into an immense cargo container called Leonardo, which was moved to Pad 39A separately.

All that cargo will enable NASA to double the crew size on the space station from three to six.

The seven Endeavour crew members, meanwhile, began practicing at Johnson Space Center the robotics operations that must be performed during the mission in space. Those training exercises in the Johnson virtual reality lab include practicing how to return Leonardo to the payload bay in Endeavour.

Aside from providing a huge re-supply benefit for the space station, Endeavour crew members will be busy with other tasks during the more than two-week mission.

In an ambitious four spacewalks, crew members will service the two space station Alpha Rotary Joints, which allow its solar arrays to track the sun.

These joints have had problems, with signs of grinding and debris found on them to the extent that full solar array mobility was compromised.

The shuttle mission will involve many U.S. astronauts: the orbiter vehicle will deliver space station Expedition 18 crew member Sandra Magnus, and return Expedition 17 flight engineer Greg Chamitoff, who has been aboard the station for more than five months.

Chris Ferguson will command Endeavour. Eric Boe is the pilot. Mission specialists are Steve Bowen, Shane Kimbrough, Heidemarie Stefanyshyn-Piper, Donald Pettit and Magnus. And they are training vigorously ahead of the liftoff.

The terminal countdown demonstration test provides each shuttle crew with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training.