Questions tagged [vacuum]

Questions regarding the effects and conditions in a 'partial vacuum' or space with a gaseous pressure significantly smaller than atmospheric pressure.

Filter by
Sorted by
Tagged with
16
votes
2answers
2k views

Could the void of space act as a good refrigerator for food in long journeys?

Providing a theoretical journey to some far place, could the void of space be used as a good refrigerator for food since it is very cold ? Assuming that radiations in the void space are somehow ...
4
votes
1answer
2k views

Is it possible to bring "nothing" back from space?

I think the ultimate souvenir would be not a moon rock or a martian, but space "nothing", but I wonder if this is physically possible... Can an astronaut go out to space with an open container, close ...
15
votes
6answers
5k views

What are the considerations for smelting iron and aluminum in space?

Iron and aluminum are the two most common metals in the Earth's crust. While we can't know for sure what we'll find for raw resources when we start building factories in space, if we assume that iron ...
13
votes
3answers
9k views

Would unpainted iron or steel rust in space?

Iron and steel are made primarily of the same substance and they tend to rust. I believe other materials like non-ferrous metal are generally preferred for their lighter weight and strength, in most ...
8
votes
1answer
1k views

Is there any type of mechanical bearing that can be used in the full vacuum of space?

Plenty of spacecraft seem to have moving parts. Space shuttle doors open, robot arms manipulate things, etc. This is perplexing, when we consider that lubricating oil probably won't remain liquid, ...
8
votes
1answer
265 views

Has any spacecraft to date suffered catastrophic gasket degeneration in space?

A gasket is a precisely formed body of some (yielding) material placed at a mating surface usually to prevent leakage. It may also be constructed of an alloy as was done in early IC engines. ...
24
votes
4answers
2k views

Are artificial satellites completely sealed or open to space?

Are artificial satellites such as communication or weather satellites completely sealed or are they open to space? (In either case, why? How are their electronics (un)affected? Presumably they can be ...
33
votes
1answer
8k views

How do manned spacecraft achieve an airtight connection while docking?

By another question I was reminded how hard it is to build airtight equipment such as vacuum chambers from multiple pieces. Docking or berthing space ships / space station modules is a rather similar ...
17
votes
4answers
5k views

Decay of a corpse in space?

This is not nice perspective, but eventually it will happen. An astronaut falls out of spaceship because of damage caused by collision with other object, or because of suit decompression. The fluids ...

1
2