Questions tagged [vacuum]

For questions about a space with nothing in it.

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18
votes
3answers
4k views

Does water in vacuum form a solid shell or freeze solid?

I'm working on a sci-fi setting which includes an aquatic space-faring species. When a human space vessel is ruptured and depressurizes, the gas can escape rapidly and we immediately suffer from the ...
15
votes
9answers
3k views

What does air vanishing on contact sound like?

I'm about to break rule seven of superpowers: don't think too hard about what it does to the air. A superhero has the ability to disappear any atoms that come within 2 cm of their skin (atoms that ...
11
votes
3answers
305 views

Plants accidentally exposed to vacuum of space - Will the settlers save them on time?

A newly-built base on the moon has the first two compartments of a pressurized greenhouse farm. An airlock system automatically seals one compartment off the others when pressure sensors indicate a ...
4
votes
2answers
153 views

Weaponising Implosion instead of Explosion

Explosions are really messy - they cause debris to be spread over a wide area. They may also cause collateral damage. I want to use implosion instead. I wish to use a force-field sphere that contains ...
-6
votes
6answers
171 views

Importing Space for Sale in Cans - How to remove the smell? [closed]

My company wants to sell novelty cans (or other containers) of genuine space from various places in the Galaxy but unfortunately space smells - see the following expert's statement. "Louis ...
7
votes
3answers
321 views

Effects of Explosive Decompression on the Human Body?

Many science fiction stories, movies, and shows involve characters undergoing explosive decompression, the technical term for a rapid drop in pressure, usually all the way to a vacuum. Frequently, ...
5
votes
6answers
196 views

Is it possible to “Smell” in Space? Viable Equivalents?

I am currently creating a Spacefaring Race that regularly travels between planetary systems in order to harvest resources, but due to the fact that the conditions required for them to Breed are fairly ...
0
votes
2answers
106 views

What does the physiology and biochemistry of a vacuum adapted post-human look like? Part 5: Senses

I am a post-human adapted for permanent life in vacuum and micro-gravity. How might my physiology and biochemistry overcome the following challenges? Please note I have a strong cultural aversion to ...
6
votes
2answers
264 views

What does the physiology and biochemistry of a vacuum adapted post-human look like? Part 4: Movement

I am a post-human adapted for permanent life in vacuum and micro-gravity. How might my physiology and biochemistry overcome the following challenges? Please note I have a strong cultural aversion to ...
8
votes
2answers
436 views

What does the physiology and biochemistry of a vacuum adapted post-human look like? Part 3: Metabolism

I am a post-human adapted for permanent life in vacuum and micro-gravity. How might my physiology and biochemistry overcome the following challenges? Please note I have a strong cultural aversion to ...
5
votes
4answers
288 views

What does the physiology and biochemistry of a vacuum adapted post-human look like? Part 2: Temperature control

I am a post-human adapted for permanent life in vacuum and micro-gravity. How might my physiology and biochemistry overcome the following challenges? Please note I have a strong cultural aversion to ...
4
votes
5answers
412 views

What does the physiology and biochemistry of a vacuum adapted post-human look like? Part 1: Radiation resistance

I am a post-human adapted for permanent life in vacuum and micro-gravity. How might my physiology and biochemistry overcome the following challenges? Please note I have a strong cultural aversion to ...
4
votes
2answers
633 views

Vacuum Rated Sharpie Or Dry Erase Marker/Board?

Would it be possible to make a sharpie or a dry-erase marker that would work in a vacuum? Would they already work? To that end could you make a dry erase board or some such?
20
votes
5answers
5k views

A very small part of an office building is gone, leaving vacuum. How does this affect its surroundings?

A small perfect sphere is suddenly gone. Everything inside is teleported somewhere -- through space or even maybe through time, we're not sure. It's a small sphere, just enough to fit a human sitting ...
7
votes
4answers
248 views

Safety equipment to survive decompression

In the future, space travel is common, so common, in fact, that commercial transport is available to most people, like air travel is to us. As a passenger on a vessel of Galactic Spacelines, half way ...
1
vote
1answer
157 views

What would happen to an airplane in space?

What would happen to an airplane in space? Or to be more specific, would anything interesting happen to the plane itself, and would the passengers and crew be able to survive for longer than a few ...
9
votes
3answers
366 views

What are the climatological effects to the surface of a planet where the atmosphere gives way to vaccum? (diagram included)

(Please see diagrams) This is a question regarding an area of a Rocheworld scenario that I haven't found anything on. It is suggested that the OUT side of a planet that is tidally locked with ...
19
votes
13answers
10k views

Can a laser in outer space really appear as visible “bullets”?

Inspired by Star Wars and other sci-fi space series, we often see their ships shooting lasers as a "big needle", shot three or four times consecutively to perform a volley of laser fire, similar to ...
0
votes
3answers
443 views

How Long Would It Take to Die In a Vacuum With Access to Oxygen? [closed]

You've just been thrown out of the airlock with out a spacesuit. However, you do happen to be wearing a SCUBA style breathing apparatus. How long would the vacuum take to kill you, even though you ...
3
votes
3answers
175 views

Using EM noise + computers to simulate sound in the cockpit

I had a fun idea for a space simulator game I'm working on from a lore standpoint. We all know that there is no sound in space due to it being a vacuum. The lack of sound would probably leave pilots (...
5
votes
4answers
358 views

Could moon landing works with vacuum tube technology alone?

Before silicon computer we used the vacuum tube in place of transistor, the computers then were extremely bulky and took up a lot of spaces. Would it be possible for a team of researchers and ...
4
votes
3answers
213 views

Build a vactrain time-machine

Context According to relativity law, it is possible to travel into the future approaching the speed of light. For the 2nd Newton's Law of motion, in absence of friction (or opposite force), we can ...
3
votes
1answer
116 views

What would happen if all dark energy instantly converted to radiation due to vacuum metastability event?

What would happen if all dark energy (cosmological constant) instantly converted to radiation due to vacuum metastability event, while otherwise vacuum properties remain the same? Dark energy density ...
1
vote
3answers
675 views

Could the principle of the zero point energy universe be used for infinite energy?

My understanding of the hypothesis is somewhat hazy, so I probably have gotten something wrong. But as I understand it, the total energy density of the universe is either very small or exactly zero, ...
6
votes
4answers
3k views

Effects of being briefly exposed to a zero air pressure environment

Assume that a person is shielded by magic. The only thing this magic does is to keep air away from that person (ignore for now any consequences to said unfortunate individual). Aside from this, the ...
4
votes
1answer
671 views

Opening the Windows, In Space

I recently envisioned a fight scene in which the three main characters are in a bar on a spaceship when about a dozen space marines ambush them. They take cover behind the bar, but without weapons or ...
2
votes
1answer
437 views

If our universe nucleated into a lower energy state without completely annihilating us all what could be the effects of changes in physical constants? [closed]

If our universe is in a state of false vacuum, and if it tunnels into a lower energy state, the most probable scenario is that all know particles and forces would be completely transformed which would ...
8
votes
4answers
2k views

Could a plant be engineered to live in a vacuum?

Could an artificial plant species be designed and created that lives in a vacuum - for example on the surface of our moon? The main problems I can see immediately would be the lack of an atmosphere ...