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 a planet realistically share an orbit with Jupiter?

So I've been working on a project where I modify the Solar System, and I originally had a small gas planet(like 5-10 earth massses) named Juno orbiting between Jupiter and Saturn. However, as it turns ...
Nip Dip's user avatar
  • 507
7 votes
2 answers
2k views

Would a Gas Giant be a feasible option for in-atmosphere fighting?

Could it be possible that a large portion (80%+) of a gas giant has thin enough atmosphere that the ships don’t suffer from re-entry effects, but thick enough that conventional dogfighting tactics ...
Blue Skin and Glowing Red Eyes's user avatar
4 votes
2 answers
219 views

How to increase Jupiter’s reflectivity?

The idea of turning Jupiter into a sun to terraform the Galilean moons is a popular one. This concept goes by the alluring name of “stellification,” but has a few important drawbacks when prodded with ...
user98816's user avatar
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3 votes
0 answers
104 views

Gas giant ecologies with more realistic weather. Sky anchors

I've always enjoyed stories that explore ideas about life in the clouds of gas giants. The Algebraist by Banks is my favorite. Though one thing that never quite rang true to me about stories like The ...
futurebird's user avatar
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1 vote
1 answer
216 views

How large should my supermassive planet's core be to prevent it from becoming a star?

My planet is a gas giant, it is called Klarloth (Inspired by a character from "Star Mouse" by Fredric Brown). Klarloth is a strange planet. For one thing, the planet is large in size, more ...
Furious Arcturus's user avatar
1 vote
2 answers
214 views

Calculating distance of the frost- and ice line

To begin, my star is a K type star with 0.65 solar masses. I've inserted my star's mass in two different templates to calculate the frost line, yielding different results (2 AU and 2.68 AU). ...
Explunky's user avatar
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0 votes
0 answers
42 views

How many giant planets could form in a hierarchical triple star system?

The system in question has a very close binary pair of 2 G-type stars, a G9V and a G7V, orbiting at about 0.2 AU, with a K2V star in a far orbit about 300 AU out around the both of them. There is a ...
Rexotec's user avatar
  • 381
1 vote
1 answer
202 views

Orbit of an earth-sized moon around a gas giant planet

I'm working on a world that is the habitable moon of a gas giant planet. For simplicity's sake, assume that the moon is about exactly Earth-size, and the gas giant planet is roughly Jupiter-sized, ...
tiluchi's user avatar
  • 121
4 votes
2 answers
214 views

Size of a gas giant with an Earth-sized moon

I am working on a world that is an Earth-sized planet that was captured by a gas giant planet moving inward in the solar system, then becoming a moon. Through magic and hand-waving mechanisms, the ...
tiluchi's user avatar
  • 121
3 votes
3 answers
196 views

Cloud formations on an ocean-covered moon

Vimala is a Luna-mass moon, orbiting a large gas giant in a yellow star system. Though it is two AU from its star, (and therefore outside the habitable zone) tidal heating helps it to support liquid ...
user98816's user avatar
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2 votes
1 answer
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How close could a gas giant be to my planet without it becoming a moon?

This is an M-type system. Let's take Trappist 1 as an example star (0.0898 Mass of the Sun) and Trappist 1e as an example planet (0.772 mass of the earth, approx 0.029 AU from the star). Assume for ...
DMacc1917's user avatar
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4 votes
1 answer
112 views

Aeroponic farming in a gas giant

In the setting of my projects there is a gas giant (with a mass of about 3 jupiters) that migrated within the habitable zone, as such it's outer atmosphere would feature plenty of water wapor and have ...
JuimyTheHyena's user avatar
1 vote
0 answers
78 views

What would be the size of the outer asteroid belt in this system?

I am following the Artifexia-like system building with the calculator. Per the calculator, my system looks like this: I am having trouble calculating the inner and outer limits of the second asteroid ...
Irithind's user avatar
1 vote
2 answers
251 views

Can Integral Trees be Sailed?

In the book The Integral Trees by Larry Niven, he presents people living in a novel environment. There is a neutron star (quite old and so cooled off mostly) around a more ordinary star. And orbiting ...
Boba Fit's user avatar
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4 votes
3 answers
228 views

Can a rocky planet form between gas giants?

The Question I am working on filling in the planets of the Ilus system. I am setting up a strange, huge, low density, sort of habitable world in the gap between two gas giants. Is there a way for a ...
Sam Kitsune's user avatar
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1 vote
1 answer
181 views

What compounds could be used to dye a gas giant the colour of a rainbow?

So, we have an incredibly advanced clarkean civilisation who, having achieved godlike technology, have taken to transforming whole planets and solar systems into works of art. One of these is Rainbow, ...
user98816's user avatar
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5 votes
1 answer
226 views

Making a moon habitable through tidal heating

Let’s say we have a Star system with a gas giant about 30 AU from the local sun. This is way too far for this particular sun to warm any moons to habitability (unless life inhabits subsurface oceans) ...
user98816's user avatar
  • 8,459
3 votes
2 answers
265 views

If a gas giant became a star, what type would it be?

The concept of gas giant stellification has always interested me. I would however like to know: if a gas giant, (let’s say Neptune) was stellified by increasing its mass to trigger a temporary fusion ...
user98816's user avatar
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4 votes
1 answer
115 views

Is my gas giant possible?

I'm designing a gas giant for my solar system with a mass close to that of Jupiter (around 315 Earth masses). Now I wanted my gas giant to be mostly brown but also with purple colored stripes and ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
5 votes
2 answers
290 views

Saturnian Cloud-Cities Pt. 6 :- Geothermal Cables Vs Stupendously Large Airships

In my previous questions, I discussed the possibility of cloud cities on Saturn And there were a few technologies which could be useful for the colony. The cloud-cities in question are giant airships,...
Furious Arcturus's user avatar
8 votes
3 answers
3k views

Terraforming a gas giant by freezing the "gas" and "liquid" and removing it by huge impacts

In my setting, humans want to colonize Jupiter, so as to establish an outpost in the outer Solar System, but cannot due to a barrage of reasons. Jupiter's gravity is really high and would prove to be ...
Furious Arcturus's user avatar
6 votes
1 answer
139 views

Could dark matter be used to change a star's position in the main sequence?

Helioforming is the ignition of gas giants of various sizes, or black dwarves, to create protostellar or even stellar celestial bodies. This can be achieved in two ways: compression or mass increase, ...
JuimyTheHyena's user avatar
8 votes
6 answers
2k views

Thorne Zytkow Planets $-$ Can a Gas Giant have a Neutron Star core?

Said gas giant is about 5 times the mass of Jupiter, hence a Super-Jupiter. This gas giant is rogue and has no parent star. Its composition is the same as regular gas giant, i.e. it is composed of ...
Furious Arcturus's user avatar
6 votes
4 answers
850 views

Should we use Saturn as a future base for colonization?

Despite being a gas giant, and being chilly cold, there are a few reasons I believe Saturn would be an ideal habitat for future colonisation, and here are a few justifications: Saturn actually has a ...
Furious Arcturus's user avatar
3 votes
2 answers
1k views

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 ...
JuimyTheHyena's user avatar
7 votes
0 answers
71 views

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’ ...
Prido1024's user avatar
3 votes
3 answers
230 views

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 ...
faddllz's user avatar
  • 1,782
5 votes
1 answer
528 views

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. ...
NullAndVoid's user avatar
2 votes
5 answers
355 views

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 ...
xeg0's user avatar
  • 23
-1 votes
2 answers
81 views

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 ...
JuimyTheHyena's user avatar
0 votes
2 answers
142 views

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 ...
JuimyTheHyena's user avatar
1 vote
3 answers
198 views

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 ...
JuimyTheHyena's user avatar
3 votes
1 answer
245 views

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 ...
JuimyTheHyena's user avatar
0 votes
1 answer
88 views

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 ...
JuimyTheHyena's user avatar
4 votes
3 answers
236 views

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 ...
JuimyTheHyena's user avatar
6 votes
1 answer
252 views

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 ...
JuimyTheHyena's user avatar
2 votes
1 answer
110 views

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 ...
JuimyTheHyena's user avatar
5 votes
2 answers
440 views

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 ...
JuimyTheHyena's user avatar
3 votes
1 answer
246 views

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 ...
JuimyTheHyena's user avatar
1 vote
1 answer
142 views

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 ...
Joe Smith's user avatar
  • 3,134
4 votes
3 answers
530 views

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/...
ParanoidNonhuman's user avatar
1 vote
1 answer
229 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 ...
The Darke Lorde's user avatar
7 votes
4 answers
311 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 ...
Tom's user avatar
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2 votes
3 answers
144 views

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....
1995inHUN's user avatar
  • 604
3 votes
2 answers
297 views

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 ...
TysonDennis's user avatar
  • 2,380
2 votes
3 answers
71 views

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 ...
Guest's user avatar
  • 33
4 votes
1 answer
222 views

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. (...
Mike Serfas's user avatar
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4 votes
2 answers
392 views

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 ...
B. T. Newberg's user avatar
-1 votes
1 answer
94 views

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 ...
JohnWDailey's user avatar
  • 14.5k
6 votes
2 answers
548 views

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 ...
tiluchi's user avatar
  • 121