Linked Questions

34
votes
8answers
86k views

What would be the effects on the human body if the oxygen level increased by a lot?

How would the human body be affected if oxygen levels increased by a lot? Our air is 78% nitrogen and 21% oxygen. If it increased to 30% oxygen, what would the effects be and how long would it take ...
20
votes
6answers
3k views

What is my breathable atmosphere composed of?

This planet's atmosphere has oxygen at a partial pressure that is breathable to humans, and the rest of the atmosphere is, at least, not made up primarily of Nitrogen (that is, it's not just Earth's ...
13
votes
6answers
4k views

Would the atmosphere of an alien planet with the following mixture of gases be breathable to humans?

35% O2 (oxygen) 61% Ar (argon) 1.07% CO2 (carbon dioxide) 0.93% As arsenic 2% Other trace elements On an exoplanet with a mass of 0.284 Earths and a surface gravity of .66 gs (6.44 m/s^2), would this ...
17
votes
6answers
1k views

How would I transport an atmosphere?

An abandoned outpost from a long extinct race is discovered. It can easily be repaired and would make an ideal location for a colony, however it has been breached and any usable air has been long ...
8
votes
5answers
23k views

What would happen if the oxygen levels decreased by 15 percent?

How would the human body be affected if the oxygen levels on Earth suddenly decreased by 15 percent? This is instant. Not over time. How would we adapt? Would some people die and some not?
9
votes
5answers
1k views

Is this atmospheric composition breathable, and what would it look like?

I have developed a fictional planet with the following atmospheric composition; 60.4% Nitrogen 27.6% Oxygen 9.8% Xenon 1.5% Water Vapor 0.64% Argon 0.06% Carbon Dioxide Is this breathable to humans ...
9
votes
6answers
1k views

How could a Desert planet have an atmosphere?

Imagine a desertic planet, large dune seas and barren rocky wastes ... Mountains and the like suggesting a past geological activity and even water once exhisted on the surface. Now though the planet ...
8
votes
5answers
654 views

How humanly survivable is my world?

Please note that I have had some incredibly helpful and useful suggestions here that I have decided to make some major revisions as a result. I will reduce the overall atmospheric pressure and partial ...
6
votes
1answer
535 views

How would this super-earth world be? (Creature evolution)

I have a super-earth world. The surface of the world is shallower due to extra gravity, so shorter mountain ranges and less ocean depths. The world orbits a binary star system at a distance of the ...
1
vote
3answers
1k views

What is necessary for a breathable artificial atmosphere?

For space travel: would you need to recreate earths air composition? Or could you just get by with the top 2 or 3 main components, i.e. either 78% nitrogen and 22% oxygen, or 78% nitrogen, 21% oxygen ...
6
votes
3answers
499 views

Potential adaptions / features for life adapted to the level of atmospheric pressure given?

Atmospheric composition: | 2% Trace gases | 58% Nitrogen | 26% Oxygen | 11% Argon | 3% Carbon dioxide | Average surface temperature: 36 degrees Celsius Surface gravity: 1.36x Earth gravity ...
4
votes
4answers
343 views

Would this type of atmosphere be suitable for human life?

I've been trying to create a Earth-like planet but I'm not sure if my planet's atmosphere is breathable. (It's mostly the amount of helium I'm worried about). I've tried to make it Earth-like while ...
9
votes
3answers
283 views

Is this planet's atmosphere stable and reasonable, and anything to keep in mind for lifeforms living in it?

Inspired by the answers to What can I add to an oxygen/nitrogen atmosphere to make it unpalatable or poisonous to humans, yet stable and breathable to local creatures?, I am building a planet that ...
4
votes
3answers
160 views

Using liquefaction of gases to make an habitable dome

Liquefaction of gases is physical conversion of a gas into a liquid state (condensation). I found that liquefaction is used to get liquid air and then split it into liquid compounds O2, N2, CO2, etc (...
4
votes
2answers
273 views

Could humans colonize this planet?

Star A Mass: 1.2 x Sol Radius: 1.157 x Sol Luminosity: 2.074 x Sol Temperature: 6,444 K Star B Mass: 0.63 x Sol Radius 0.691 x Sol Luminosity: 0.158 x Sol Temperature: 4,378 K Semi-Major ...

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