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Discovery blasts off on space station construction mission
CAPE CANAVERAL, Fla. -- Space shuttle Discovery and a crew of seven rocketed away Tuesday in pursuit of the international space station, where a formidable construction job awaits them. Discovery blasted off at 10:38 a.m., carrying up a giant Tinkertoy-type link that must be installed at the space station before European and Japanese laboratories can arrive. Despite a forecast calling for rain right at launch time, the weather ended up cooperating. And a chunk of ice on plumbing between the external fuel tank and Discovery — 4 inches by 1½ inches — was deemed too small by NASA to pose a serious launch hazard. It appeared to be melting as the countdown entered its final minutes. Launch director Mike Leinbach wished the crew good luck and Godspeed just before liftoff. ``We're ready to take Harmony to her new home,'' replied commander Pamela Melroy, referring to the new space station compartment aboard Discovery. Discovery's fuel tank was modified following the last mission to prevent dangerous ice buildup from the super-cold liquid hydrogen and oxygen, and reduce the potential for launch debris. The patch of ice that had NASA scrambling less than two hours before launch cropped up on a pipe that carries the hydrogen from the tank into the shuttle. The shuttle wings, however, were not altered in any way, even though a safety engineering group pressed for a delay because of concern over three panels with possible flaws. Melroy, only the second woman to lead a shuttle mission, expressed her confidence late last week about flying Discovery, as have many of the senior managers who decided to skip wing repairs. A possible cracking problem with the protective coating on three of the wing panels was deemed an acceptably low risk. A hole in the wing brought down Columbia in 2003, the result of a strike by a slab of fuel-tank foam insulation at liftoff. Discovery and its crew are embarking on a two-week mission that is considered the most challenging and complex in the nine years of orbital assembly of the international space station. The shuttle is carrying up an Italian-built live-in compartment, about the size of a small bus, that the astronauts will attach to the space station. It's named Harmony, the choice of schoolchildren who took part in a national competition. About 130 of those youngsters traveled to Cape Canaveral to witness the launch. Also on hand for the launch was ``Star Wars'' director and writer George Lucas. Packed aboard Discovery is the lightsaber used by the character Luke Skywalker in 1983's ``Return of the Jedi'' to mark the 30th anniversary of the first ``Star Wars'' film. Europe and Japan's laboratories will link up with Harmony once they are launched by shuttles over the next few months. After they arrive at the space station on Thursday, Discovery's astronauts also will move a massive girder and set of solar wings from one part of the orbiting complex to another. That work will involve extending radiators as well as the folded solar wings — 240 feet from tip to tip when outstretched. In all, five spacewalks are planned, four to complete this construction job and one to test a method for fixing damaged shuttle thermal tiles using a caulking gun and high-tech goo. The demonstration with sample tiles was added after Endeavour suffered a gouge to its belly during the last launch in August from a piece of flyaway fuel-tank foam. Once Discovery leaves, the three space station residents — one of whom will be dropped off by the shuttle — will face even more construction work to prepare for the European lab's arrival as early as December. Discovery's crew includes an Italian astronaut making his first spaceflight, Paolo Nespoli. E-mail this story | Print this story | Search archives | RSS Show comments |  Hide comments | Hide comments on all stories |
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