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Q&A

Posts tagged atmosphere

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Q&A Could a high-pressure, low oxygen atmosphere reduce fire risk while still being breathable?

Years ago I read a letter in a magazine suggesting a method for reducing the fire risk in an enclosed environment such as a space shuttle. The idea was to reduce the oxygen concentration to the po...

1 answer  ·  posted 12mo ago by Pastychomper‭  ·  last activity 11mo ago by dsr‭

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Q&A 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 ...

3 answers  ·  posted 5y ago by Canina‭  ·  edited 2y ago by Canina‭

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Q&A What Factors Could Cause a World to See "Northern" Lights Much Closer to the Equator?

I'm currently designing a world where the inhabitants see the Aurora Borealis on an almost nightly basis almost all the way to the equator. The lights are so strong they rarely see the stars beyond...

4 answers  ·  posted 8y ago by Liath‭  ·  last activity 2y ago by Canina‭

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Q&A 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 have a roughly Earth-like planet in a solar system some distance from ours. The atmosphere of this planet is largely similar to that of Earth, but particularly, has a somewhat higher oxygen conte...

9 answers  ·  posted 6y ago by Canina‭  ·  edited 2y ago by Canina‭

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Q&A Is it feasible to have an oxidizing planetary atmosphere without the presence of an organic photosynthesis of some kind on the planet?

With the emergence of cyanobacteria on earth 3.5 billion years ago, the shift from a reducing to an oxidizing atmosphere began. "The atmospheric O$_\textrm{2}$ levels (in PAL; i.e., normalized to ...

1 answer  ·  posted 2y ago by RosesBouquet‭  ·  last activity 2y ago by RosesBouquet‭

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Q&A Properties of an Argon based gas giant

I am writing a novel where a habitable moon orbits a purple gas giant. In looking here and elsewhere I'm finding it incredibly hard to get a sense of the elements-breakdown of elements that would b...

1 answer  ·  posted 2y ago by RMurphy-Keith‭  ·  last activity 2y ago by RMurphy-Keith‭

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Q&A What would a thicker atmosphere do to plant growth/evolution?

I'm working on a concept for a habitable world with venus-like atmospheric pressures, where humans have settled onto huge tabletop mountains where the atmosphere isn't as crushing. This is a terraf...

0 answers  ·  posted 2y ago by DehLeprechaun‭  ·  last activity 2y ago by DehLeprechaun‭

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Q&A Artificial oxygen oasis in an otherwise CO2 atmosphere

I wonder if it is possible to install artificial equipment that would exhaust oxygen into air in otherwise CO2 atmosphere so that locally people could breath in open air without any kind of tent or...

3 answers  ·  posted 2y ago by Anixx‭  ·  last activity 2y ago by Anixx‭

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Q&A An Earth with a permanent winter state with drastically reduced temperature, dark skies and mass extinctions

I had posted a question a couple of days ago asking if it would be possible for an artificial satellite/cosmic body at the L1 orbit to block out the Sun, but the logistics of that is a little too e...

1 answer  ·  posted 3y ago by Space_Cadet‭  ·  last activity 2y ago by Space_Cadet‭

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Q&A What would happen if the mass of air around earth doubled?

So the mass of air around the earth has doubled. How it doubled isn't part of the question, but for the curious let's say a space station floating around earth processed all the nitrogen, oxygen, c...

3 answers  ·  posted 2y ago by chase leffers‭  ·  last activity 2y ago by chase leffers‭

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Q&A Are there *plausible* planetary conditions where jet aircraft just don't have much advantage over propeller-driven aircraft?

I've seen Which is easier to develop: a piston prop engine or a jet engine? and my own Effects of ~10atm pressure on engine design neither of which answers this. Would different atmospheric densit...

2 answers  ·  posted 3y ago by Tristan Klassen‭  ·  last activity 3y ago by Tristan Klassen‭

Question atmosphere vehicles
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Q&A What does it look like inside a transparent glowing gas?

If you were inside of a gas that was producing its own light (for example, air at 900°C), what would it look like? Would it look foggy, or would objects that aren't the same colour as the glow sti...

3 answers  ·  posted 3y ago by Ichthys King‭  ·  last activity 3y ago by Ichthys King‭

Question atmosphere
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Q&A Calculating average sea-level air pressure

Right now I'm currently trying to calculate the average surface pressure at sea level of an atmosphere, but I'm having a struggle finding the relevant formulae with which to determine this number. ...

1 answer  ·  posted 3y ago by Lev‭  ·  last activity 3y ago by Lev‭

Question atmosphere gas
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Q&A Can a perpetually darkening atmosphere exist and yet still allow life to evolve?

I am creating a science fiction worldbuilding project, in which humanity has colonised distant exoplanets. One such planet is a Venus-like planet in the sense that it has a perpetual cloud cover, a...

3 answers  ·  posted 3y ago by QUESTER42‭  ·  last activity 3y ago by QUESTER42‭

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Q&A Can the color of an alien sky be calculated solely from atmospheric composition and the star's (or stars') spectral type(s)?

What exactly are the relevant numbers for such a calculation, and can it account for the color of the sky? By sky color, I mean the day to day hue that humans (or something else with very similar ...

1 answer  ·  posted 3y ago by John O‭  ·  last activity 3y ago by John O‭

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Q&A Feasibility of Hydrogen-Oxygen Atmosphere

My augmented society of humans have managed to engineer their power-hungry cyborg components to run on a hydrogen fusion reactor. Whilst they have so far managed to fuel it by drinking lots of wate...

2 answers  ·  posted 3y ago by Starsong67‭  ·  last activity 3y ago by Starsong67‭

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Q&A Could power be generated using the temperature difference in venus's atmosphere?

On Venus the surface is around 467 degrees Celsius. At the top of the atmosphere it is much cooler, and at around 60 km above the surface the temperature is around 40 to 50 degrees Celsius. This is...

3 answers  ·  posted 3y ago by meaninglessname‭  ·  last activity 3y ago by meaninglessname‭

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Q&A What are planetary side effects of having a thicker atmosphere?

I've been told that having a thicker atmosphere would make it easier to fly, particularly of heavier-than-air designs, so I'm interested in giving my planet such conditions. I'm mainly interested t...

1 answer  ·  posted 3y ago by Vigilant‭  ·  last activity 3y ago by Vigilant‭

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Q&A Planet With Higher Atmospheric Pressure

Consider a planet with Earth like gravity but an atmosphere that is 10x what Earth has at sea level (atmospheric composition is equivalent to Earth). If the vegetation is similar to Earth's, would ...

3 answers  ·  posted 3y ago by user92101‭  ·  last activity 3y ago by user92101‭

Question atmosphere flora
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Q&A How would normal colors be affected if a planet's atmosphere was green?

Good day everyone. I've recently finally gotten around to writing a sci fi novel but need help on some of the science of a few concepts I would like to incorporate in the novel. I'll start with ...

3 answers  ·  posted 3y ago by Primordial‭  ·  last activity 3y ago by Primordial‭

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Q&A The One Problem With Terraforming and Colonizing a Super-Earth

Many people are excited with the idea of super-Earths--rocky, habitable exoplanets greater in mass, density and diameter (because I'd prefer to go the whole way than stop at the halfway point) than...

3 answers  ·  posted 3y ago by JohnWDailey‭  ·  last activity 3y ago by JohnWDailey‭

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Q&A Atmospheric isopropyl alcohol

Could a measurable amount of isopropyl alcohol occur naturally in an otherwise reasonably earth-like atmosphere? And if so, what is the highest possible concentration that a human could survive lo...

1 answer  ·  posted 3y ago by Lev‭  ·  last activity 3y ago by Lev‭

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Q&A "Rich mix" methane/oxygen atmosphere on a planet -- how would life develop?

Let us assume we have a rocky planet by the name of Pyros orbiting a single star, the Star of Random. It has an atmosphere consisting of 77% methane, 21% oxygen, 1% water vapor, and 1% other gases...

2 answers  ·  posted 5y ago by Shalvenay‭  ·  last activity 3y ago by Shalvenay‭

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Q&A 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 whil...

4 answers  ·  posted 4y ago by A good username‭  ·  last activity 3y ago by A good username‭

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Q&A How to explain a planet with visible cosmos at daytime?

So I'm working on a fictional planet which would experience a daytime sky similar to this. This particular picture is from the movie Valerian: City of a Thousand Planets. Fictional alien atmosph...

3 answers  ·  posted 3y ago by JordanTheCynic‭  ·  last activity 3y ago by JordanTheCynic‭

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Q&A Could you fly a Boeing 747 on Venus?

I have been making a future colonization scenario where people have vast colonies on Mars and cloud top bases on Venus. These things are unbelievably large. I've already thought of a way to travel ...

4 answers  ·  posted 3y ago by Greenie E. - Reinstate Monica‭  ·  last activity 3y ago by Greenie E. - Reinstate Monica‭

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Q&A Aerodynamics of propeller vs screw/fin based aerial propulsion

Would it make sense to use screw- and fin-like bending surfaces for propulsion (like what eels or the king of herrings have but in the atmosphere) instead of regular propellers or even flapping win...

1 answer  ·  posted 3y ago by user72590‭  ·  last activity 3y ago by user72590‭

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Q&A Dinitrogen monoxide as a gaseous oxidizer for life

Could alien life use nitrous oxide, N2O, as its oxidizing gas, like oxygen on earth? What biochemical reactions would be needed to produce and utilise this gas? I've also heard conflicting messag...

2 answers  ·  posted 3y ago by Aezyc‭  ·  last activity 3y ago by Aezyc‭

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Q&A Can an atmosphere be thicker at higher altitudes?

Can a world exist where the atmosphere is actually thicker at some altitude than at sea level? If so, what mechanisms would be involved?

5 answers  ·  posted 3y ago by Renan‭  ·  last activity 3y ago by Renan‭

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Q&A Asteroids with an atmosphere

What would be the likelihood of an asteroid developing a thin layer of gas? If an asteroid is capable of having an "atmosphere", then how likely would be be for primitive plant life, such as a moss...

1 answer  ·  posted 4y ago by Sylvanus‭  ·  last activity 3y ago by Sylvanus‭

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Q&A Carbon Monoxide Rich Atmosphere

I want to make an atmosphere rich in carbon monoxide, but as it doesn't stick around for very long, it will need to be replenished. I'm looking for concentrations comparable to those of carbon diox...

2 answers  ·  posted 3y ago by Aezyc‭  ·  last activity 3y ago by Aezyc‭

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Q&A How could an Earth-like planet support all-metal airships?

When I say all-metal airships, I'm referring to something like the above from Jakub Rozalski's artwork - the design is more akin to a naval destroyer or battleship and less like a zeppelin. We'v...

6 answers  ·  posted 3y ago by Vigilant‭  ·  last activity 3y ago by Vigilant‭

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Q&A What would gravity, breath, and human bodies be like near the heart of the Earth?

If humans lived on the inside of the earth's crust, what would happen if they climbed mountains? These mountains would stretch toward the burning center of the Earth. Would gravity get stronger the...

2 answers  ·  posted 3y ago by System‭  ·  last activity 3y ago by System‭

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Q&A What would it take to slow down fermentation? (Specific: Wine / grape juice)

I am working on a story about a person who was raised on an earth-like planet and later moves to our earth. The planet he is from specializes in fruit juice and alcohol making, in specific, wine. W...

9 answers  ·  posted 3y ago by The Silhouette‭  ·  last activity 3y ago by The Silhouette‭

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Q&A Assuming a flat world and no obstacles, how far could you see?

I know this question has been asked in similar places, but I'm after a specific part of the problem. Assuming the following: Perfectly flat, infinite world Earth's atmosphere Sun directly overhea...

4 answers  ·  posted 3y ago by Cygnus X-1‭  ·  last activity 3y ago by Cygnus X-1‭

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Q&A Are planets like the "To'ul'hian Worlds" from Orion's Arm plausible?

The Orion's Arm Universe Project includes a description of what they call "To'ul'hian Worlds", planets that are (in the simplest of terms) a cross between Earth and Venus. I'm working on designing...

3 answers  ·  posted 3y ago by Lawton‭  ·  last activity 3y ago by Lawton‭

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Q&A How extreme can a habitable tidaly locked world be?

I want to create a tidally locked world with a habitable (broadly Earth like atmosphere and biome that humans could breathe and live in) band stretching around the terminator pole to pole. There wo...

1 answer  ·  posted 3y ago by Slarty‭  ·  last activity 3y ago by Slarty‭

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Q&A How does composition change if you extend an Earthlike atmosphere 50km below sea level?

I'm working to design the atmosphere of a fictional planet inspired by Venus (let's call it Cael). Cael's atmosphere at an altitude of 50 km is essentially identical to Earth's atmosphere at sea l...

2 answers  ·  posted 3y ago by Lawton‭  ·  last activity 3y ago by Lawton‭

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Q&A Generating breathable air on Europa?

Humans have colonized the subsurface oceans of Europa - building large cities embedded in the icy crust, hanging beneath it, and resting on the rocky seafloor. These colonists mine metals for const...

3 answers  ·  posted 3y ago by Zxyrra‭  ·  last activity 3y ago by Zxyrra‭

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Q&A Orange Suns and Blue Jupiters

I am developing a fictional planetary system in which a large gas giant planet (slightly less than the mass of Saturn), has migrated into the habitable zone during the formational years of the syst...

1 answer  ·  posted 3y ago by Arkenstein XII‭  ·  last activity 3y ago by Arkenstein XII‭

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Q&A Alien planet concept: could a completely misty, dark atmosphere be possible?

I was thinking of creating an alien planet that orbits a star slightly past the habitable zone, but is kept warm by an extremely dense atmosphere, made primarily of a black gas, but still contains ...

3 answers  ·  posted 3y ago by Double_S‭  ·  last activity 3y ago by Double_S‭

Question atmosphere planets
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Q&A A character steps outside in the upper atmosphere of Venus- how sunburned is he?

For complicated reasons our hero's blimp in the Venus atmosphere at an altitude of 50 km gets a tear in it and sunlight floods inside (there is no gondola, the blimp is a semi-ellipsoid of breathab...

2 answers  ·  posted 3y ago by qazwsx‭  ·  last activity 3y ago by qazwsx‭

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Q&A Surface temperature of a icy rogue planet

A certain imaginary stellar system had once a water world. But instead of evaporating away under the stellar wind, this lucky (or unlucky?) water world (made of only water and a gaseous atmosphere)...

3 answers  ·  posted 8y ago by Jorge Aldo‭  ·  last activity 3y ago by Jorge Aldo‭

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Q&A What would be the effect(s) of high-speed plasma impacting a planet?

As a follow-up to this question, what would be the effect(s) of a high-speed of super-heated plasma entering and impacting on a planet? The planet is about the size of 1.2x Earth(s), with a simila...

2 answers  ·  posted 3y ago by Hunt Castle‭  ·  last activity 3y ago by Hunt Castle‭

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Q&A Would there be Rayleigh scattering in an atmosphere of sulfur dioxide?

Can a planet with a dense atmosphere composed mainly of sulfur dioxide have a blue sky like Earth's due to Rayleigh scattering? Or would the composition change the color of the sky? I mean, it's we...

1 answer  ·  posted 3y ago by URIZEN‭  ·  last activity 3y ago by URIZEN‭

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Q&A How to get a green gas giant?

In Deep, deep space, there exists a star system with a single planet. This planet, named Dewel, is a large, green gas giant with a mass of about twice Jupiter's. What could this planet's atmosphere...

4 answers  ·  posted 3y ago by Greenie E. - Reinstate Monica‭  ·  last activity 3y ago by Greenie E. - Reinstate Monica‭

Question atmosphere
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Q&A How to figure out layers of the atmosphere?

Earth's atmosphere, as you probably know, is divided into five layers - the troposphere, stratosphere, mesosphere, thermosphere and exosphere. https://en.wikipedia.org/wiki/Atmosphere_of_Earth#Str...

2 answers  ·  posted 3y ago by SealBoi‭  ·  last activity 3y ago by SealBoi‭

Question atmosphere planets
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Q&A Astronaut Survival on a Toxic (Ammonia) Watery Planet

My story begins with a group of colonists on a ship when something happens (spoilers) and the colonists are forced to abandon ship and land on a nearby uncharted moon of a gas giant. The good news...

1 answer  ·  posted 3y ago by Jacob Badger‭  ·  last activity 3y ago by Jacob Badger‭

Question atmosphere survival
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Q&A Jupiter Leaks Into Earth

A recent question here on SE:WB reminded me of a short story I wrote a long time ago, and has inspired me to revisit the idea. The premise: A race of massive alien creatures travel from planet to...

2 answers  ·  posted 3y ago by BMF For Monica‭  ·  last activity 3y ago by BMF For Monica‭

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Q&A What gas can replace ozone as a UV filter in a planet's atmosphere?

Consider a planet with life forms, which are different than those found here on Earth, orbiting a star similar to the Sun. Such life forms don't use oxygen and, therefore, the planet's atmosphere i...

1 answer  ·  posted 3y ago by URIZEN‭  ·  last activity 3y ago by URIZEN‭

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