Questions tagged [gas-giants]

For questions relating to gas giants: large planets composed of gases (usually mostly hydrogen and helium).

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Could harvesting antimatter from a Gas giant's van Allen Belts be feasible?

Could a sufficiently advanced civilization feasibly harvest antimatter from the van allen belts of a gas giant and use it for fast interplanetary travel. The main idea stemmed from this video, among ...
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7 votes
0 answers
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How would the landscape of a gas giant's core-mantle boundary look like? [closed]

In my setting, the characters live at the bottom of a gas giant's metallic hydrogen ocean, just above the rocky core. There the dense metallic hydrogen acts as the ‘air’ and the core as the ‘ground’ ...
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3 votes
3 answers
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Plausibility check : an habitable exomoon

Is this moon plausible this moon is a little bit smaller than our moon it has thick atmosphere. so much so that floating algae thrive in the wind. the moon is not too close to its planet nor it's ...
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4 votes
1 answer
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Where can lithium be found in the Solar System?

My question is pretty straightforward, beside earth, what celestial bodies could hold exploitable quantities of lithium-7 and lithium-6? I understand that lithium is a scarce element in our universe. ...
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2 votes
5 answers
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Would Moons of a gas giant appear to phase when looking at them from another, tidally-locked Moon?

I'm designing a fantasy world on a tidally-locked moon of a gas giant. Because it's primarily a medieval fantasy set on the outward-facing side of the home moon, I'd like to keep units of time similar ...
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2 answers
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Conditions for tilted gas giants [closed]

I have been working on further refining the solar system that would serve as the setting for my narrative project and in particular I'd like to settle one issue that's been on my mind. I have been ...
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0 votes
2 answers
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Would my gas giant have rings?

The gas giant in question is about 3 times the mass of jupiter with a density of 3.58 grams per cubic centimeter. It formed naturally beyond the system's forstline and then migrated into the habitable ...
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1 vote
3 answers
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How to make tides on my world less destructive?

I am currently developing an habitable moon oribiting a gas giant in a resonant orbit, however at the current time I am concerned about the effect of the gas giant on my world when it comes to tidal ...
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3 votes
1 answer
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Could a space faring civilization extract valuable resources from a gas giant?

I have been developing an advanced civilization inhabiting a world orbiting a gas giant about 3 times the mass of jupiter, the conditions have already been tuned to allow life to develop over its ...
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0 votes
1 answer
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How big would my habitable moon's primary planet appear in the nightsky in these two situations?

How much bigger than earth's moon would my habitable moon's primary appear in the nightsky? And is there a way to calculate how bright it would be in lux when it is illuminated in full? Here is the ...
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3 votes
3 answers
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Is this habitable moon formation scenario plausible?

My and my teams' works take place on a moon orbiting as giant about 3 times the mass of jupiter (possessing also a massive moon system) in a solar system with an F-star and be either the first, third ...
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6 votes
1 answer
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How bad would tides be on an habitable moon orbiting a gas giant in a 5:2 resonance (meaning not actual tidal locking)?

I have been working on an habitable moon (roughly 0.7 to 0.9 times the mass of the earth) orbiting a gas giant about 3 times the mass of jupiter and I have been thinking about a scenario in which I'd ...
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2 votes
1 answer
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What are the conditions required for a tidally locked world to be in orbital resonance?

I have been looking into the orbital mechanics of tidally locked worlds lately and saw some interesting things. Namely that would-be tidally locked moons/planets can have rotation periods that differ ...
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4 votes
2 answers
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How can a gas giant's magnetosphere affect a supposedly habitable tidally locked moon orbiting it?

I have been working on an habitable moon orbiting a gas giant about 3 times the mass of jupiter and lately I have been having issues assessing how the giant's magnetosphere may affect it. To give you ...
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3 votes
1 answer
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Habitability of my world

For a big narrative project of mine I and my team developed an habitable moon that revolves around a gas giant in a star system with an F-star. I wanted to know what you think about it and if you ...
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1 vote
1 answer
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Life in a Neptune atmosphere?

https://phys.org/news/2021-06-life-atmosphere-sub-neptune-planet.html This article suggests that if extremaphiles were transported by meteorite to a neptune-like planet they might be able to establish ...
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Floating islands in a gas giant

A highly improbable mini-Neptune develops (naturally or artificially) an atmospheric layer perfectly suited for carbon-based air-breathers like us: a livable ratio of oxygen to helium/nitrogen/argon/...
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1 vote
1 answer
187 views

How long should a Life-Harboring Mega-Moon's orbit around its Mother Planet be?

Damarian, the world I'm building, is the largest moon of its gas giant planet, Checuti. Damarian's diameter is 19,113 km, but its gravity is nearly the same as Earth's (It' largely made out of a ...
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6 votes
4 answers
237 views

how would a semi-permanent colony orbiting Jupiter protect itself from radiation?

It seems like the Jupiter system is especially attractive in terms of natural resources, and while I assume the majority of any extraction labor will be performed by machines, I also figure there will ...
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2 votes
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What kind of ecosystem would naturally develop on a relatively large outer moon of a gas giant?

As far as I know, moons that orbit a gas planet from a greater distance are less likely to be tidally locked, more likely to have a retrograde rotation but tend to have unstable orbits and axial tilts....
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2 votes
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Light reflecting off a gas giant onto its moon

Okay, thanks to Ash, I know how to calculate the percent power of light hitting a planet at various angles. It is equal to cos(θ)2, where θ is the incident angle. I have a gas giant with a radius of ...
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Is the following plausible: a moon at an L1 point orbits a gas giant, which orbits a sun. the moon is submerged in half daylight half moonlight

I'm writing a sci-fi & fantasy novel, I won't get into details, but in essence it's set on a fantasy moon that orbits a gas giant, which orbits a sun. The moon is at an L1 (Lagrange 1) point, and ...
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What would a carbon-based organism encounter deep in Saturn?

Saturn's predominant lifeform begins with allotropes of elemental carbon: graphene, diamond, nanotubes and geodesic shapes. These are doped in places with nitrogen, phosphorus, and germanium. (...
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4 votes
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How bright is night on a moon orbiting a gas giant?

I have an Earth-like moon tidally-locked to a gas giant that is Saturn-like but without rings. On the side facing the gas giant, how much brighter would nights appear when the gas giant is fully ...
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-1 votes
1 answer
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What Kinds of Gas Giants Would Work Best in Orbiting an Orange-Dwarf Binary?

The term "gas giant" is, surprisingly, not uniform. It turns out that there are far more to the gas giants than Jovian or Saturnian. I won't list you all of them, just those that I find ...
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6 votes
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What would happen on the surface of a terrestrial planet captured by a gas giant?

So, from what I've read of Porter & Grundy (2011), most gas giant planets orbiting within their star's habitable zones are thought to have migrated there from further out in the solar system, with ...
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Could a habitable gas giant with an electropshere exist?

So, there are several questions on this site about gas giants. In particular, I am mostly building off of this one: Could a gas giant with layer similar to Earth atmosphere exist? This question seems ...
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Tropical Moon Orbiting Gas Giant [duplicate]

I am asking this question, “How would it be possible for the moon of a gas giant to naturally be habitable for human life?” Specifically, I’m looking at these criteria: Has a tropical climate with ...
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6 votes
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Plausibility of a habitable gas giant atmosphere

So I was watching Issac Arthur videos recently, about colonizing the other planets of our solar system. And it was pointed out that Neptune and Venus have atmospheres and gravity such that an airship ...
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3 votes
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Is my binary planet realistic?

I had this idea for a terrestrial planet-ice giant binary system. Both planets had their origin inside the outer solar system but were moved into the habitable zone by a passers-by black hole. The ...
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8 votes
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Gaseous moons: Are they possible?

Our solar system has 4 gas giants(Uranus and Neptune are technically ice giants, but who cares), which share nearly 200 moons amongst them. Yet all of these moons, even the giant ones like Ganymede, ...
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4 votes
3 answers
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Would a laser relay work better on the surface of an airless body or in orbit?

Background: In the early 22nd century, a laser station has been established on Uranus' moon, Cordelia to shoot chunks of frozen deuterium into the inner solar system for fusion fuel. However, the ...
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5 votes
0 answers
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How could a station on Cordelia be designed in order to extract helium-3 and deuterium from Uranus? [closed]

Some details: At the end of the 21st century, the first expedition to Uranus launches to mine helium-3 and deuterium from its atmosphere. The plan involves a tether dangled into the upper atmosphere ...
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6 votes
2 answers
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What conditions to make this habitable moon plausible?

I'm trying to figure out how to make this gas giant moon habitable. Here are the factors involved: Moon is sub-temperate, mountainous with a nitrogen-oxygen atmosphere, with the planet being mainly ...
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10 votes
6 answers
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How could a breathable ultra-high pressure atmosphere form?

Some background: I'm developing a world that could, theoretically, be inhabitable by humans (with a high enough recruitment success to at least keep a stable population), randomly determining ...
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3 votes
1 answer
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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 be ...
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6 votes
3 answers
634 views

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 own ...
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4 votes
2 answers
320 views

General characteristics of an "aircraft" for gas-planet atmospheres?

In the future gas giants, ice giants, mini neptunes and gas dwarfs have been colonised. The colonisers use either hot hydrogen or vacuum in rigid ballons to keep their cloud cities up in the endless ...
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2 votes
1 answer
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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 and ...
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2 votes
3 answers
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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. ...
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5 votes
4 answers
287 views

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 ...
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3 votes
2 answers
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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 can ...
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-2 votes
1 answer
192 views

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. It ...
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3 votes
3 answers
447 views

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 into ...
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7 votes
1 answer
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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 billion ...
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2 votes
1 answer
255 views

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 drew ...
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9 votes
1 answer
593 views

Brown Dwarf Star vs Gas Giant as parent for habitable moon

I seek to build a habitable moon of a giant planet, thus I looked at the Rouche Limit Equation to figure out how to get the biggest possible Hill Sphere for my moon to exist in. $r_H = a(1-e)\sqrt[3]{...
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13 votes
1 answer
1k views

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 display? ...
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2 votes
2 answers
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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 (to ...
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9 votes
2 answers
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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 visible,...
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