Volume: 03, Issue: 11 06/01/2005 
Space Shuttle Discovery, resting on the Mobile Launcher Platform, rolls away from Launch Pad 39B via the Crawler/Transporter underneath. Image courtesy NASA/KSC.
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Space Shuttle Discovery, atop a Mobile Launcher Platform, makes its way slowly toward the Vehicle Assembly Building at NASA’s Kennedy Space Center. The view is across the Turn Basin. Image courtesy NASA/KSC.
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Space Shuttle Discovery, atop a Mobile Launcher Platform, rolls into high bay 1 in the Vehicle Assembly Building at NASA’s Kennedy Space Center. Image courtesy NASA/KSC.
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Other Articles in This Issue:
Spitzer Telescope Captures Miracle of Star Birth
Cassini Seeing Red... On Titan
Radio Signals Help Decipher Saturn Ring Structure
Brush Up on Fundamentals through Science Exhibits

Discovery Removed from Launch Pad

Space Shuttle Discovery has left the Launch Pad at NASA’s Kennedy Space Center. Discovery will get a new, modified external fuel tank before its Return to Flight mission, STS-114. The Return to Flight crew had been rehearsing for a mid-May excursion, but launch is now slated for July 13, 2005.

Once Discovery was removed from the launch pad, the Shuttle returned to the Vehicle Assembly Building at NASA's Kennedy Space Center. The journey spanned more than 4 miles and took roughly 10 hours.

"Rolling back Discovery was the right thing to do and demonstrates our commitment to a safe Return to Flight," said Shuttle Program Manager Bill Parsons. "We will continue to focus on the processing milestones and complete the additional analysis we determined was required, so that we continue to move toward a launch during the July window."

Technicians will de-mated Discovery from its External Tank (ET-120) and Solid Rocket Boosters on May 31. Discovery will be attached to ET-121 on June 7. ET-121 was originally scheduled to fly with the Shuttle Atlantis on the second Return to Flight mission (STS-121).

A new heater will be added to ET-121 on the feedline bellows, which is the part of the pipeline that carries liquid oxygen to the Shuttle's main engines to minimize potential ice and frost buildup. The tank has received other safety improvements as well, including an improved bipod fitting that connects it to the Orbiter and temperature sensors and accelerometers used to measure vibration. These sensors will gather information about the tank's performance during flight.

After the heater is added to ET-121 and the Shuttle is attached to its new propulsion elements, Discovery will roll back out to Launch Pad 39B in mid-June. Discovery's payload, the Italian-built Multi-Purpose Logistics Module Raffaello, will be installed in the payload bay, while the Shuttle is on the pad.

Launch of Discovery for STS-114 is targeted for July 13. The launch window extends to July 31. During its 12-day mission, Discovery's seven-person crew will test new hardware and techniques to improve Shuttle safety and deliver supplies to the International Space Station.

Photos of the rollback can be found at http://mediaarchive.ksc.nasa.gov/index.cfm . For the latest information on NASA's Return to Flight efforts, visit http://www.nasa.gov/returntoflight .

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