The space shuttle Discovery safely reached orbit shortly after lift off yesterday afternoon, and is on its way to dock with the international space station on Thursday, presumably to see the effects of weightlessness on tiny screws.[1]
This was NASA's second flight since the Columbia disaster over Texas in 2003, when the orbiter disintegrated during reentry, as a result of damage incurred during liftoff. Today, shuttle astronauts spent some time examining the orbiter's exterior, especially areas that were hit with falling foam similar to that which lead to the Columbia disaster, and returned with the cosmic signal for everything's okay, by waving a sombrero at a passing communications satellite.
Early inspections revealed no major damage to the space shuttle Discovery, NASA said Wednesday after a day of checking out the spacecraft with on-board cameras. That means that when the shuttle meets up with the international space station Thursday morning it likely won't need emergency repairs while hooked up with the orbital outpost -- unlike last year's daring spacewalk fixes.
NASA says that the damage and issues which impacted (sorry) Columbia are not cause for concern on Discovery.
Wednesday's inspection by the astronauts uncovered a thermal tile filler poking about a half-inch out of the belly of Discovery. [Deputy shuttle program manager John] Shannon said better data should be available Thursday but for now, engineers do not believe the dangling fabric will pose a danger for re-entry or require spacewalking repairs, as it did last summer when two similar strips had to be removed in orbit.
This so-called gap filler dates back to 1982 and is in an area where the thermal tiles are fairly thick, Shannon said. Additional gap fillers might be loose as well and may be spotted by the space station crew when the shuttle closes in for docking, he said.
So why, if the shuttle is so seemingly vulnerable to chunks of deadly foam and at the mercy of unreliable gap filler, is NASA still flying them? According the the Christian Science Monitor, you go into space with the vehicles you've got, not the vehicles you want -- especially where the international space station is concerned.
When the space shuttle Discovery docks with the International Space Station Thursday, some of the loudest cheers will be overseas.
That's because the shuttle is the only vehicle able to deliver key components of the station over the next four years. Its success will determine whether the station becomes a fully functional international laboratory - or a useless, partially built curiosity circling Earth. It may also determine whether the United States remains a player in future international efforts in manned spaceflight.
Though the shuttle remains the most advanced spacecraft at the moment, the program is so incredibly expensive that NASA is considering grounding the fleet and replacing the shuttle orbiters with vehicles much similar to the "capsule atop the giant rocket" that the space agency originally used with the Gemini and Apollo missions.
It won't happen any time soon, though. The ISS is specifically designed to work with the shuttle, and at least seventeen more missions are needed to complete the space station. And if the ISS isn't completed, we may never know the effects of weightlessness on tiny screws.
[1] Actually, it's to deliver about 2.5 tons of freight, but I couldn't find any Simpsons references that incorporated the space shuttle and 2.5 tons of freight.
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