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US Plans Lunar Motel
OffTheLip writes "The US is planning to build a permanent lunar base which will support future visits to Mars. The living conditions on the moon presents a variety of challenges from medical to construction. Contingency planning would be critical but some feel the challenges presented on the moon will be less than Mars. The moon is closer to Earth, the atmosphere is less harsh and, unlike Mars, water does not exist. Is this the start of the next space race?"
You're right, it's not astonishing. Thanks to the Apollo missions and more recent studies it was determined that our moon and many others in the solar system actually have very faint atmospheres. Though the Moon's gravity is very low it's just enough to hold a thin concentration of gas molecules very close to the surface:
http://www.windows.ucar.edu/tour/link=/earth/moonI do see your point, common sense would make it seem that it's just a vacuum. What with all the impact craters and the sky being always black over there.
Quantum mechanics: the dreams that stuff is made of.
"...However, Russell Kerschmann never forgot. He is a pathologist at NASA Ames studying the effects of mineral dust on human health. Both the Moon and Mars are extremely dusty worlds, and inhaling their dust could be bad for astronauts, says Kerschmann.
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"The real problem is the lungs," he ex-plains. "In some ways, lunar dust resembles the silica dust on Earth that causes silicosis, a serious disease." Formerly known as "stone-grinder's disease," silicosis first came to idespread public attention during the Great Depression when hundreds of miners drilling the Hawk's Nest Tunnel through Gauley Mountain in West Virginia died within five years of breathing the fine quartz dust kicked into the air by dry drilling--even though they had been ex-posed for only a few months. "It was one of the biggest occupational health disasters in U.S. history," Kerschmann says...."
"...Quartz, the main cause of silicosis, is not chemically poisonous. "You could eat it and not get sick," he continues. "But when quartz is freshly ground into dust particles smaller than 10 m (for comparison, a human hair is 50+ m wide) and breathed into the lungs, they can embed themselves deeply into the tiny alveolar sacs and ducts where oxygen and carbon dioxide gases are exchanged." There, the lungs cannot clear out the dust via mucus or coughing. Moreover, the immune system's white blood cells commit suicide when they try to engulf the sharp-edged particles to carry them away in the blood-stream. In the acute form of silicosis, the lungs can fill with proteins from the blood. He adds that it is as if the victim slowly suffocates from a pneumonia-like condition.
Lunar dust, which like quartz is a compound of silicon, is (to our current knowledge) also not poisonous. But like the quartz dust in the Hawk's Nest Tunnel, it is extremely fine and abrasive, almost like powdered glass. Astronauts on several Apollo missions found that it clung to everything and was almost impossible to remove. Once it was tracked inside the lunar module, some of the dust easily became airborne, irritating lungs and eyes...."
http://www.space.com/adastra/adastra_moondust_060
Take a welding class sometime. There is much much much more to welding than the standard oxy-acetelyne torch.
:)
Oxygen is not required. There are certain high-strength welding processes that even require a vacuum to work.
They already need to deal with the problem of oxygen, hydrogen, and nitrogen getting into the welds, which is why stick welders have a thick coating of flux on the rods and MIG and TIG welders cover the weldment with a variety of inert or mostly-inert gasses.
There are other problems, of course.
Gentoo Sucks