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Questions tagged [gasses]

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2
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2answers
118 views

Other than He and N as pressurizing gases

To pressurize the liquid propellant tanks Helium is most widely used and after that Nitrogen. Helium is quite costly and Nitrogen is economic but it messes with the O/F ratio of the engine (ref). So, ...
29
votes
6answers
7k views

Do spacecraft ever release unneeded gases into space?

My child is learning about the human body and frequently wants to know whether his favorite things work the same way. He asked me if spaceships fart (we've talked about Firetrucks and tailpipes, to ...
8
votes
2answers
1k views

Can a machine process and run on $CO_2$ and $H_2O$ for an $O_2$ supply?

On Mars studies have shown that carbon dioxide solidifies to dry ice at the poles. During the winter months can electrolysis be applied to collected and then contained liquid $CO_2$ to replenish ...
9
votes
1answer
456 views

What is the purpose of the helium and argon gas supplies on ISS?

I finally figured out that the nitrogen gas is used for the MELFI (minus eighty freezers). I can't figure out what the argon would be used for, though I can see how helium might be useful for ...
17
votes
1answer
413 views

Why did the Earth based observations of methane on Mars go wrong?

ScienceNews states that: Scientists had previously identified methane on Mars using Earth-based telescopes and spacecraft orbiting the Red Planet. In 2003, researchers detected a ...
10
votes
2answers
377 views

Are there enough stray gasses in space to justify streamlining a probe?

Space isn't empty - there are tons of things floating around in it. Seem of these things are pockets/molecule of gas - and a space probe is very likely to encounter some of these at some point in its ...
4
votes
2answers
91 views

Would a biological resource-system be feasible for long-term manned flights?

Supposing a long-term manned flight is planned would a biological resource-system be considered as an option? Would a biological resource-system work or is a technical solution superior? Currently ...
43
votes
2answers
4k views

Why does the International Space Station produce so much methane?

According to NASA, roughly "1,000 pounds of methane are produced on International Space Station and dumped overboard as waste gas every year"[1]. It seems like an awful waste to just get rid of it. ...
20
votes
2answers
420 views

Is converting moon dust into oxygen a viable option for sustainability?

On the about page for Project Morpheus, the possibility of converting moon dust into oxygen is mentioned: It was manufactured and assembled at JSC and Armadillo Aerospace. Morpheus is large enough ...