Questions tagged [atmosphere]
For questions about the gases which surround a planet or some other celestial body.
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How deep would a canyon on this planet have to be to have an earth-like atmosphere?
I have, for a while now, been intrigued by the planet Canyon in Larry Niven’s Known Space universe:
Canyon was once an uninhabitable Mars-like world known as Warhead. It
is the second of seven ...
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Geological activity and of superearth - cannonball moon system
I understand that this situation is hypothetical -- I just need a piece of advice to make it more realistic.
In my story, there is a superearth of 4,5 Earth masses and 1,35 Earth's radius, rotating ...
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Conditions for my tower to be above the clouds
I want to build a tower on top of which I should see clouds below.
Example: View from top to be right above clouds (even temporary low clouds are fine)
Question : What conditions are required to get ...
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Aerial Combat in a High-Pressure Atmosphere
The world I've been working on has a higher gravity (1.4g) and a denser, more oxygen-rich atmosphere (33% O2, 4 bar). While this has a plethora of effects, this question primarily discusses the ...
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If possible, what would be the conditions for a planet like Earth to have an emerald green sky in its twilight zone? [closed]
Regardless, how can I get an idea of how the color of starlight, or any other natural phenomenon, impacts the color of the sky at different times of day?
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Plausibility of a planetary ocean containing both $H_2O$ and a form of potassium?
To give a bit of context, I'm trying to tackle a challenge I set out for myself in writing up a speculative biosphere wherein complex land life emerges, without the advent of photosynthesis at all. As ...
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What collateral damage would a mach 23 bullet cause?
In my sci-fi story there is a man-portable railgun. The gun fires a 4mm-wide tungsten bullet with a muzzle velocity of Mach 23.
The inventors of this weapon could have made the projectile faster but ...
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Could a moon roughly the size of Earth's have an active core and magnetic field?
I'm currently working on a project with an inhabited terrestrial planet slightly smaller than Earth, and orbiting it is a moon, which is a similar size to that of Earth's moon. While our own moon has ...
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Is the sky on venus likely to be blue above the cloud layer? [duplicate]
In my sci-if universe, humans are settling in the upper atmosphere of venus, and I was just wondering what kind of view they’d have. According to the Soviet venera probes, the sky on venus is likely ...
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Could it be possible to have a planet made of chunks of floating rock?
I've had an idea for several unique planets in my sci-fi fantasy world, perhaps the most unique is the capital of the alliance between several interstellar governments. The planet is made of thousands ...
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In what detail can you examine a distant planet's atmosphere?
Scenario
We've got a terrestial exoplanet three times the size of Earth, 1800 light years away and with an atmosphere similar in composition to Earth's. It is determined via studies that atmosphere ...
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planet atmospheric composition
I am been making an alien planet for my xenobiology project, this planet would have an atmospheric pressure of 1.5 atm and it would be composed of the following gases:
Nitrogen: 83.7%
Oxygen: 10.4%
...
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Colour of the sky on a planet near a red dwarf [duplicate]
The twin planets Rhoda and Mary are two planets orbiting Barnard’s Star, a red dwarf star 6 lightyears from earth. The two orbit 0.05 AU from their sun, and 415,000 km from each other. They are ...
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Would Liquid CO2 form a Separate Layer Beneath the Ocean?
In the series of stories that I'm writing, I have a star system with one of its outer planets being a world with a thick carbon dioxide atmosphere, similar to venus, but it's far enough out to be room ...
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Would a breathable atmosphere be possible on an ice planet?
For my setting, I want to create an ice planet composed primarily of water, containing a subsurface ocean. It would be roughly the mass of Earth. As cybernetic/genetic modification is prevalent in ...
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How long would it take for the air to escape from a punctured dome habitat?
It’s the 26th century, and scientists on a barren planet have decided to make the Alpha Centauri Book of World Records by conducting the galaxy’s largest social experiment.
These scientists construct ...
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What color should my planet's skies be?
Assuming the skies are clear of suspended particles, what color should they be at mid-day if viewed with human eyes?
The planet is larger and twice as massive as Earth, with a nearly identical ...
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How to estimate the energy output of artificial suns
Setting
I'm designing a world where only a thin belt wrapping the equator of a planet is hospitable. It would look something like this:
The backstory, diluted for brevity, is that the central sun was ...
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How to build a gas giant?
In this universe, gravity wells are needed to enter and exit FTL, many cheap spacecraft are not armored enough to go near a star so gas giants are the next best option.
One particular solar system has ...
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Effects of leaving a trail of positively ionized atoms
I am aware that brainstorming isn't exactly allowed and this just might lean a lot towards that but here's my question anyways.
Imagine a robot made out of Handwavium or something that is capable of ...
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I’m trying to imagine an Earth-like planet around Barnard’s star
What I have established about this planet is that it is the size of Earth but it is located 2.2 AU from Barnard’s star, a red dwarf. I’m trying to figure out how much greenhouse gases are needed to ...
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Is a planet with no atmosphere but a global cave system of caves with an atmosphere possible?
Basically a planet with a global network of caves filled with gas with occasional openings to the airless surface.
The openings would look like underwater brine pools, ranging in diameter from a few ...
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A planet with acid rains but its atmosphere is breathable
I am trying to create a planet that rains acid, and that has acidic oceans of water, but a breathable nitrogen-oxygen atmosphere.
This planet has native lifeforms that have evolved to withstand these ...
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What will the 2050's earth atmosphere will look like? [closed]
I'm currently developing a project where i have to design a pair of shoes that will resist all or most of the weather conditions in 2050. Due to climate change, shoes or materials used will change, i'...
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How would a world composed of floating tectonic plates (Chaos) work?
In the world of Chaos for a book/TV series I may create, a super Earth planet was embroiled in a 100 year long war, until the advanced Rhiobanna Dominion used a massive web of underground nukes to ...
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What greenhouse gas could increase the temperature of a planet with the least damage to living beings?
Following this question. After a certain incident, my Earth-like planet now only receives 0.3% of the sunlight it was originally receiving.
To compensate for this, someone, as an answer to my last ...
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Accelerating venus’ rotating by venting gas
So, given that my earlier question, amount of mass needed to speed up Venus rotation, is a no-no, I am resorting to one last method of changing the planet’s rotation before giving up on Venus entirely....
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Fog and a small "Tsunami", appearing suddenly
For the final act of a story I'm building, I'm planning a scene that involves the sudden appearance of fog, along with a small Tsunami, affecting part of the city.
To ask this question, I am going to ...
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How would the water cycle work on a planet with barely any atmosphere?
See title.
My world is far away from any stars so radiation is of no worry but a very active volcanic system keeps the temperature at similar rates to our planet. The lack of an atmosphere stops any ...
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Is a planet with a chlorinated atmosphere and water/ammonia oceans possable?
Ok, so I have an inhabited planet that has a moderately chlorinated atmosphere (7% chorine), and with oceans that are composed of a water/ammonia mix. the temperature is very cold, -50 C. I am ...
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Would using something similar to reentry heating for preflight/postflight decontamination harm the atmosphere? [closed]
The world of Blort enjoys a thriving interstellar trade! But it learned the hard way in the Year of the Chuknik that ignoring the outside of an incoming spaceship is bad. Really bad. Plague bad. They ...
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Red mist: what could create such a phenomenon?
In my science fiction story,there is a phenomenon happening on the moon that looks like a red mist (or nebula, if you will). This mist can slowly move around, because it is controlled by an advanced ...
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If someone were to teleport from sea level. How loud would the collapse of the resulting human-sized atmospheric void be?
Would it be loud enough to hear and is there any risk of dangerously loud sound waves being generated if the object being teleported is large enough?
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Can my Planet Have Liquid Water at the Poles -- But Only During the Winter?
I have a planet about the size of earth. It is a desert planet with an atmosphere at 0.1 atm, made of 90% co2 and 10% n2. Water at this pressure should freeze at 35℉ and boil at 125℉. The planet has a ...
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Is it possible to have an Illuminated Standard temperature and pressure pocket inside of a comet? [closed]
The title is fairly self explanatory. A pocket inside a comet, able to have liquid water and similar pressures to earth. I want a realistic and science based way to achieve this.
requirements:
Must ...
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How far would a planet with these specifics orbiting a sun-like star have to be for solar wind to not strip the atmosphere?
I'm currently writing up a world inhabited by tall, humanoid crow-like aliens, and I have all the specifics down, I'm just struggling to figure out how far said planet, with the characteristics listed ...
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what planetary phenomenon could prevent accurate scans [closed]
I have a universe where space travel is common. A large group of settlers veered off course and crashed on a desert planet and have not yet been rescued for 50+ years and had to fight amongst ...
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What composition would a white atmosphere have?
I am playing Kerbal Space Program with the Precursors Planet Pack, which starts you on the planet Frontier with a white atmosphere, as viewed both from the surface and from space.
What kind of ...
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Would copper-based blood be more effective at carrying oxygen rather than iron-based? Or would it hinder the delivery of oxygen?
Would copper-based blood be viable for a human-like land-based species in an earth-like atmosphere or would it be worse than iron-based blood?
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Is it possible for a planet to have a noticeable portion of its atmosphere be radon gas?
Radon Gas is radioactive, and has a half-life of about 3.8 days. It is a decay product of Radium-226, which in turn is a decay product of Uranium-238.
Now there is a planet, let's name it Marvin. ...
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How thick should my atmosphere be?
I recently asked a question conserning a planet I am designing:
Can my planet maintain a magnetic field after being tidally locked?. Based on these answers I determined that my planet may be capable ...
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How unlivable could I make a planet, but still have it livable? [closed]
So I wanted to make a prison that is like no other. The planet itself is the prison. Your put on the planet and you serve your sentence and then you get taken back to your home planet. How hellish ...
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How far would a shaft of light penetrate a hollow earth?
Imagine if all of earth's interior were suddenly replaced with a volume of atmosphere (78% N, 21%O, etc), and by some fantastic force the crust remained perfectly rigid and stable.
My question is: if ...
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What types of adaptations might alien life have to survive high atmospheric pressure?
I’m wondering if anyone has any scientifically plausible ideas for adaptations to a high atmospheric pressure (10 atm) environment. This pressure would be too high for humans to survive for extended ...
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Is an atmosphere's oxygen partial pressure or concentration more biologically significant?
I'm confused about the relationship between partial pressure and concentration of a gas, in relation to the biology of respiration. If I have a planet with high atmospheric pressure - maybe like 10 ...
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If Earth's atmosphere is technically violet but our eyes can't see it, is there a possible variable that can let us perceive that?
There are a LOT of unworked holes in this, but the basic premise is my planet is a P-type orbit in a binary star system where these two stars have close orbits around each-other in order for the ...
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Would this atmosphere require humans to wear gas masks but perhaps get acclimated over time?
I got some great feedback on this atmosphere already, so I decided to lower the oxygen levels as a result of the feedback.
I am creating an atmosphere for a planet in a science fiction book I am ...
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Is this a breathable atmosphere for human-like aliens that have more efficient oxygen-carrying blood? Normal humans would require a gas mask (oxygen)
I am creating an atmosphere for a planet in a science fiction book I am writing and want to make sure that this atmosphere is not too outlandish in regards to sustaining life. I know the oxygen ...
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Can my planet carry heat effectively from one side to another?
I'm designing an Earth-like planet orbiting around a K5V star in the habitable zone (the planet is at a distance of 0.41 AU).
The star has a mass of 0.70 M and a surface temperature of 4,526 Kelvin.
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Argon instead of nitrogen
I read through https://simple.m.wikipedia.org/wiki/Argon it says that argon can be used in doping. If humans have to settle down on a planet, that has the nitrogen of earth swapped for argon, can they ...
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