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Very important in space flight (well, at least the launch part!) Air is approximately 21% oxygen, so using air instead of oxygen would have weighed nearly 5 times that of the pure oxygen. To get back to your question, the important rule is Henry's Law as quoted from Dr. Martin's book.
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www.madsci.org/posts/archives/aug2000/966272823.Gb.r.ht...
www.madsci.org/posts/archives/aug2000/966272823.Gb.r.html
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This is the same with gases like oxygen, they can't get very far from the Earth because gravity pulls them back. On planets or moons that have very low gravity, gases can escape and enter space.
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www.newton.dep.anl.gov/askasci/gen06/gen06131.htm
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Space engineers believe the oxygen generator aboard the international space station is nearing an irremediable breakdown — but that’s not a crisis, thanks to backup systems. ... HOUSTON - Is the oxygen generator aboard the international space station working or not? Its status has been changing on an almost hourly basis,
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www.msnbc.msn.com/id/6800245/
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In what should have been the "home stretch" of their mission, the crew of the space station is now struggling with new oxygen supply problems . ... Gennady Padalka, left, and Mike Fincke, right, pose inside the space station's PIRS airlock along with their spacesuits. The two are scheduled to leave ... Other oxygen sources;
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www.msnbc.msn.com/id/5953450/
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If there is no oxygen in space, how does the Sun "burn"? ... People, including scientists, sometimes say that the Sun "burns hydrogen" to make it glow. But that is just a figure of speech. Hydrogen really doesn't burn, it fuses, into helium. So no oxygen is required...
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starchild.gsfc.nasa.gov/docs/StarChild/questions/questi...
starchild.gsfc.nasa.gov/docs/StarChild/questions/question36.html
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An international team of researchers has discovered oxygen in space, an occurrence that appears to be surprisingly rare in the universe. ... But until now, scientists have not been able to find oxygen in interstellar space.
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www.cbc.ca/technology/story/2007/05/03/tech-spacemolecu...
www.cbc.ca/technology/story/2007/05/03/tech-spacemolecularoxygenfound-20070503.html?ref=rss
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Making oxygen from wate ... The water would help replace the water used to make oxygen, and the methane would be vented to space. ... Life support systems on the ISS provide oxygen, absorb carbon dioxide, and manage vaporous emissions from the astronauts themselves. It's all part of breathing easy in our new home in space.
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science.nasa.gov/headlines/y2000/ast13nov_1.htm
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We know that fire needs oxygen in order to burn. Then how come stars continue to burn even though there is no oxygen in space? Asked by: Raza ; Answer; If stars "burned" like giant lumps of coal, you are correct that oxygen would be needed for combustion.
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www.physlink.com/education/askexperts/ae639.cfm
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In regard to the reactions of oxygen in space. Is pure elemental oxygen exsplosive in space enviorment vaccum. It would appear so as such problems occured in two apollo crafts. In general; due to ionzation, gravitaion changes and vaccum state does the element oxygen become a exspolive agent,or hazard.
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nai.arc.nasa.gov/astrobio/astrobio_detail.cfm?ID=503
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