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Q&A

Posts tagged gas

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Q&A Water & Nutrient Cycle of an upside down forest

This is a follow up question to Sky of Earth and Seas of Sky I have a medieval fantasy setting where people live in a vast expanse of giant caves contained in a sort of giant Stanford torus. This...

7 answers  ·  posted 2y ago by Nosajimiki - Reinstate Monica‭  ·  last activity 2y ago by Nosajimiki - Reinstate Monica‭

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Q&A Could a galaxy of Nicoll-Dyson beams hit a single target?

This was an idea for a flashback as I pick up my story around 100 trillions years from now at the point where star formation is ceasing and the red dwarf and stellar remnant era begins. Now living ...

2 answers  ·  posted 2y ago by RandySavage‭  ·  last activity 2y ago by RandySavage‭

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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 Is it possible for a moon to stay on the same side of its planet relative to the sun?

I'm building an earthlike world that has a moon orbiting a gas giant. Is it possible for the moon to always be between the planet and the sun? Also, is it possible for a moon to rotate around its o...

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

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Q&A What is the best form of powered vehicular flight within a McKendree habitat?

Background A McKendree cylinder is a spinning space habitat in the style of an O'Neill cylinder (below), but orders of magnitude larger. McKendree habitats are hundreds of kilometres in diameter a...

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

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Q&A Where to place an artificial oceanic island?

I want to build a seastead in international waters that starts small. It has to be in the Atlantic, preferably in the northern hemisphere close to either the american or european continent. Due t...

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

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Q&A What percentage of stars would need to become Shkadov thrusters to move the whole galaxy?

The advanced civilization in my story is trying to reach as many galaxies as possible in the next few billions years before the expansion of space has sent those galaxies permanently out of reach w...

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

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Q&A Meteorological consequences of walls reaching into the sky, enclosing a large area

Suppose we walled off a 1000 km square. These walls would be made of unobtanium (so they don't break), and have no cracks or holes that go all the way through. They are also around 15 kilometres hi...

1 answer  ·  posted 2y ago by Mark Gardner‭  ·  last activity 2y ago by Mark Gardner‭

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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 2y ago by Lev‭

Question atmosphere gas
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Q&A Are Orbital Rings feasible to construct in another star system?

In this universe, Earth had a couple orbital rings during the construction of the colony ships that were sent to Alpha Centauri. Humanity has achieved fusion power and efficient space flight (1g ac...

2 answers  ·  posted 3y ago by user72655‭  ·  last activity 3y ago by user72655‭

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Q&A Navigating a sea of sulfur hexafluoride

Sulfur hexafluoride is pretty awesome. It is a gas six times denser than regular air, and thus you can actually make tinfoil "boats" float on it. It also makes your voice deep when you breathe it i...

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

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Q&A How to allow a cylindrical habitat (O'Neill or McKendree) to radiate heat to space?

Background I am trying to find a design for a cylindrical habitat that would allow the enclosed cylinder to radiate heat out to space as does the Earth without using mirrors and windows. Problem ...

6 answers  ·  posted 3y ago by Abanob Ebrahim‭  ·  last activity 3y ago by Abanob Ebrahim‭

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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 How changing planetary ring affects the migration of terrestrial fauna?

Imagine a gas giant as massive as Jupiter has a enormous planetary ring which will expand and contract throughout its orbit around a main sequence star. Then there is a moon as massive as Mars an...

1 answer  ·  posted 3y ago by user6760‭  ·  last activity 3y ago by user6760‭

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Q&A How massive can a structure get on the inside of a Mckendree cylinder?

Background A McKendree cylinder is a rotating cylindrical space habitat comparable to the more well known O'Neill model. It was proposed by NASA engineer Thomas McKendree in 2000 as an update of O...

1 answer  ·  posted 3y ago by Abanob Ebrahim‭  ·  last activity 3y ago by Abanob Ebrahim‭

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Q&A Maximum Size Limit for a Wooden-and-Bamboo Neo-Ziggurat

There is a concern that's been brought up only recently--steel and concrete buildings are environmentally wasteful. In further clarification, they waste away too much greenhouse gases. And consid...

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

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Q&A How to get a habitable moon without too long day-night cycle?

It appears that there are gas giants in habitable zones of stars, and likely some of them should have moons that are big enough to have an Earth-like world, so that part should be plausible enough....

3 answers  ·  posted 3y ago by Joku_242‭  ·  last activity 3y ago by Joku_242‭

Question moons gas-giants gas
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Q&A Could an enormous structure be used to attract rain by acting as an artificial mountain?

If it were possible to build a giant geodesic dome tens of miles in diameter, what effect would it have on nearby weather? If built in an arid climate like the Sahara or Australia, would it be li...

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

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Q&A Is there dense, non flammable gas that I can cover the Earth in?

This question is related to Deadly, Heavier than Air Gas, and Is a world with two different types of air possible? but has several different criteria. I've also looked at https://chemistry.stackexc...

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

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Q&A How could a skyhook stay in orbit with no human involvement for thousands of years

In the story I'm writing, three humans with stone-age technology and no knowledge of space accidentally awaken thousands of cryogenically preserved humans. These humans immediately get to work on...

4 answers  ·  posted 3y ago by John Lewis‭  ·  last activity 3y ago by John Lewis‭

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Q&A How to mine a star?

Things like Dyson spheres need a whole lot of raw material, which is rather difficult to come by, since the elements needed for good structural steel are scattered fairly thinly into the universe u...

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

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Q&A Hurricane-force winds or gentle breezes in an O'Neill Cylinder?

Let's consider an O'Neill cylinder with a radius of 3.2km and length of 20km. In the classic O'Neill design, we have three large axis-aligned windows in the shell, alternating between purlins of ha...

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

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Q&A Which side of a tidally locked moon experiences higher radiation?

Looking most specifically regarding the moons around Saturn, Jupiter, and Uranus. I've been unable to get a concrete answer on this through various sources. I've actually read several articles brie...

1 answer  ·  posted 4y ago by Kabob Maraca‭  ·  last activity 3y ago by Kabob Maraca‭

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Q&A Would gas giants work as waste disposal sites?

In my novel, the many moons of Jupiter and Saturn have been colonized, but I'm running into some logistical problems - namely, waste disposal. My first instinct was to dump it on-moon; while this ...

12 answers  ·  posted 4y ago by Kabob Maraca‭  ·  last activity 3y ago by Kabob Maraca‭

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Q&A Mining Metallic Hydrogen

The Hegemony is in need of superconductors for their fleets of stratospheric craft (stratocraft for short) as well as many, many, many other applications. I recently read metallic hydrogen is a the...

1 answer  ·  posted 4y ago by Celestial Dragon Emperor‭  ·  last activity 3y ago by Celestial Dragon Emperor‭

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Q&A The Mighty Generation Ship Jupiter

"The planet moves." Inspired by this link in a comment from Gryphon here, I also see the concept in this question. We've colonized the moons of Jupiter adjusted their orbits to our satisfaction (...

2 answers  ·  posted 4y ago by Pelinore‭  ·  last activity 3y ago by Pelinore‭

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Q&A Can a gas giant have its own habitable zone?

Gas giants can generate heat via the Kelvin-Helmholtz mechanism. It's oft-repeated that Jupiter actually generates more heat internally via this method than it receives from the Sun. Scale this mec...

4 answers  ·  posted 8y ago by Leushenko‭  ·  last activity 3y ago by Leushenko‭

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Q&A What could cause Fluorocarbons to be present in an Earth-like atmosphere?

Pretty simple (in theory that is) question for one of my worlds. I heard carbon fluorides are intense greenhouse gases but otherwise harmless and didn't lead to large issues (atleast none that I co...

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

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Q&A Is it possible to have multiple different climates within one O'Neill cylinder?

The illustrations of O'Neill cylinders I have come across with so far allow unrestricted view through the whole tube. Some are more playful with topography but still, there is a visible end. Are t...

3 answers  ·  posted 3y ago by Backup Plan‭  ·  last activity 3y ago by Backup Plan‭

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Q&A Can a Jupiter-Like Gas Giant Have Deep, Dark Storms?

For this question, I was inspired by the following image of the "Jupiter Abyss": What I want to know is, can a Jupiter-like gas giant have thousands of giant black storms, kind of like what I've...

4 answers  ·  posted 3y ago by overlord - Reinstate Monica‭  ·  last activity 3y ago by overlord - Reinstate Monica‭

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Q&A Imagine a well functioning atmosphere on the terraformed moon

Just assume we are long into the future, all other parameters have been met and we have the technology, will and money to terraform our moon and keep it so. Atmosphere, as commonly agreed on, would...

1 answer  ·  posted 3y ago by Backup Plan‭  ·  last activity 3y ago by Backup Plan‭

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Q&A Harvesting Energy from Gas Giants

In my world, humans live on a moon of a gas giant that has extreme weather conditions. They also: have crystals that can store energy. possess the ability to make floating islands (on which they...

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

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Q&A How large would a space station have to be to hold one million people indefinitely?

A moon-sized asteroid approaches Earth in the near future, where space tourism has become normal. The Earth has a few satellite structures above Mars conducting research, as well as successful terr...

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

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Q&A Is it possible to calculate how long a moon takes to orbit a gas giant?

if it takes the moon 6 months to pass through the gas giants shadow? Assume it is distant enough to not be tidally locked. The gas giant is 112.5 AU from the star. The star is 55 solar masses. ...

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

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Q&A What kind of Gas Giant has a "safe zone" between the radiation from a star and the radiation from a gas giant planet?

This is a progression from my first question, here (if this is too similar to my original question, please let me know of a better way to address this, as I am not getting the answers I need on tha...

2 answers  ·  posted 4y ago by Dalila‭  ·  last activity 3y ago by Dalila‭

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Q&A Is a Jupiter-sized planet plausible in a habitable zone?

We lived through loads of questions regarding aquatic races, so buckle up, I am going to gather some ideas around insectoids. The homeworld and race This race lives on a planet which has lower g...

4 answers  ·  posted 8y ago by Pavel Janicek‭  ·  last activity 3y ago by Pavel Janicek‭

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Q&A Gas Giant with solid surface

I have the feeling the answer to this will come down to ''impossible'' but let's ask anyway to be sure. We know gas Giants have no solid surface and if you tried to land on one you would fall int...

3 answers  ·  posted 3y ago by Blue Devil‭  ·  last activity 3y ago by Blue Devil‭

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Q&A How could an animal "smell" carbon monoxide?

Carbon monoxide (CO) is a colorless, odorless, and tasteless flammable gas that is slightly less dense than air. So begins Wikipedia's article on carbon monoxide (CO). To the best of my inte...

9 answers  ·  posted 3y ago by kingledion‭  ·  last activity 3y ago by kingledion‭

Question biology gas
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Q&A Temperature and climate "under" the gas giant in a tidally locked moon

I've begun the laborious (but fun!) process of putting another world together. Known constraints include: Habitable, (super-)Earth-sized, tidally-locked moon to a gas giant; the giant, where vis...

2 answers  ·  posted 4y ago by Lumos‭  ·  last activity 3y ago by Lumos‭

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Q&A Heating a gas giant's moons in a red dwarf system

Being new, this is my first question. I've read some other posts that gave me valuable insight, but I still have some questions. First, some specifics: Star: red dwarf. 80 x jupiter mass. 3 bill...

1 answer  ·  posted 3y ago by Diego Cruz Barreto‭  ·  last activity 3y ago by Diego Cruz Barreto‭

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Q&A Can liquid water exist on the moons of this gas giant?

This is an edited hopefully more focused version of a question I asked a while ago. I made the mistake of asking too many questions the first time so I'll try and be a bit more focused here. I d...

1 answer  ·  posted 3y ago by Dusty Spectacles ‭  ·  last activity 3y ago by Dusty Spectacles ‭

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Q&A Can you make a star from other gases, and how long would they last?

In my Conworld, the inhabitants have discovered a type of star they cannot identify. I would like it to be a star made not from just hydrogen and helium, like our sun and countless others. But my q...

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

Question stars gas
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Q&A Hot air balloons lifting bridges in volcanic areas are possible?

In this world, there is a land isolated by a lava line, and the only way to get in there, is across a bridge levitated by hot air balloons. I had the idea of making a wooden bridge being supported...

2 answers  ·  posted 3y ago by Neto Ananias‭  ·  last activity 3y ago by Neto Ananias‭

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Q&A Building a planet with a primordial black hole core

I have been trying to figure out a way of explaining how an advanced society some time in the past built an artificial planet with a black hole at its core and the effects that would have on the pe...

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

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Q&A What would the climate of a planetwide city be like?

Assume the entirety of Earth (all the land) is covered in a city. What would the climate be like in different parts of it? I.e., what would it be like on the coast, or inland? I imagine it would b...

5 answers  ·  posted 3y ago by V. Red‭  ·  last activity 3y ago by V. Red‭

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Q&A Deadly, Heavier than Air Gas

In a given fantasy world, I need a deadly (yet not magical) gas that will naturally pool in low depressions and valleys. The level of magic is not high, so I'd like it to be an actual chemical tha...

17 answers  ·  posted 7y ago by Danny Reagan‭  ·  last activity 3y ago by Danny Reagan‭

Question gas
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Q&A How to explain planetary rings pulsating?

A spacecraft enters an unnamed system and spotted a gas giant with a pulsating planetary ring, it glows bright intermittently. What natural phenomenon could be responsible for such brilliant displa...

1 answer  ·  posted 4y ago by user6760‭  ·  last activity 4y ago by user6760‭

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Q&A Separating light gases from heavy without chemistry

How do steampunk civilizations get lifting gas? Inspired by the above question I was tempted to suggest collecting the gases rising from public toilets. I know that human gaseous emissions contai...

3 answers  ·  posted 4y ago by chasly from UK‭  ·  last activity 4y ago by chasly from UK‭

Question reality-check gas
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Q&A Life on a gas giant?

I know of the conceptualized "Sinkers", "Floaters" and "Hunters" that Carl Sagan and Edwin Salpeter of Cornell conceived of - as possible life forms that might inhabit a gas giant. At the time they...

3 answers  ·  posted 4y ago by GRF‭  ·  last activity 4y ago by GRF‭

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Q&A Prevailing winds on a rotating space habitat

A common, matter-efficient science-fiction habitat is a hollow cylinder or ring in space that is spun to simulate the pull of gravity on its interior surface. These habitats have been imagined as s...

4 answers  ·  posted 4y ago by Mike Nichols‭  ·  last activity 4y ago by Mike Nichols‭