Questions tagged [gas-giants]

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

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23
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4answers
5k views

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 ...
32
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6answers
8k views

Is it possible to orbit inside a gas giant?

When we talk about orbits we often imagine a ship or station orbiting a planet outside its atmosphere. Is it possible a ship could go into orbit inside its atmosphere (perhaps to hide from other ...
8
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3answers
801 views

Captured Earth-Like Moons around Gas Giants

Is there a limit (and if so, what is it) to the size (mass) of terrestrial planet that could be "captured" as a moon by a migrating gas giant? I'm writing a novel where a colony ship crashes on such ...
5
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3answers
1k views

Naturally making a gas giant moon habitable

Let's say that in my planetary system there is a gas giant around the size and distance from the Sun as Jupiter. I need the planet to be similar enough to earth to be able to be inhabited natural by ...
20
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4answers
4k views

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 ...
18
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11answers
6k views

What would be the first thing humans would mine on Jupiter?

Jupiter is a terrible place to be, but for a number of artistic reasons, I'd like to have my story take place there and only there. "Mining", or resource extraction by any other name, is the usual ...
19
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4answers
1k views

Earth-like Moon around the Gas Giant. Eclipse length?

Worldbuilder in dire need! I'm trying to figure out the eclipse length of a habitable Earth-like moon that is rotating around a gas giant. The story that I work on is centered on the Earth-like moon, ...
18
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1answer
960 views

Can a habitable moon rely on the magnetosphere of its parent planet for radiation protection?

Science-based answers, please. Key points: the main concern is radiation protection for sustainability of human life (and accompanying plant and animal life ecosystems, whether earth-like or not). ...
6
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3answers
945 views

Life on a rogue planet

I am imagining a special ecosystem on a rogue planet (a planet that wanders throughout space without orbiting a star or other heavenly object) but I would need your help to fill in the gaps and ...
2
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4answers
2k views

How to build a “cloud city” in a gas giant?

Another question made me remember this. Consider a sizable base (building, station) in the atmosphere of a gas giant planet. It should hold a staff of a couple hundred, with supplies and scientific ...
2
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1answer
600 views

Conditions for human life in a Jupiter-like system

I was wondering about a setting where a moon orbiting a gas giant can sustain human life on its surface, i.e. with nearly identical conditions compared to Earth (e.g. size, gravity, mean temperature, ...
10
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3answers
646 views

What is the maximum orbital time for my moon around my planet?

I fear the math involved is beyond my capabilities on this one. I have what I consider to be more than a Layman's understanding of the physics involved, and I believe I can follow the math well ...
8
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4answers
520 views

Can this unique planet be colonized?

In the story I'm writing, a gas dwarf (named Eden) is discovered in a triple star system. Its atmosphere is mainly oxygen and water based, and its gravity is slightly higher than Earth's. Unlike our ...
3
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1answer
507 views

Feasible star + planet + moon combo? Did I miss anything that makes this system wildly unstable or otherwise impossible?

Here's what I've come up with: The star: A main sequence star, roughly a sol analogue Younger than Sol (say 3-3.5 billion years old) roughly the same starting mass as Sol, but has had less time to ...
3
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2answers
116 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 ...
9
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3answers
827 views

Details needed for day cycle of lunar world orbiting a gas giant

I'm writing a science fiction story set on a moon orbiting a gas giant. I want to understand how the world's day night cycle would appear from its surface and how the world might be affected by this ...
34
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7answers
6k views

Could you float a boat on a gas giant?

A futuristic entrepreneur wants to start a cruise line company and needs to build a cruise ship that will not only float on a gas giant, but be habitable throughout a 7 day trip (for the uber-rich of ...
28
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12answers
9k views

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 is ...
9
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2answers
1k views

Smallest Black Hole to 'heat' a Gas Giant

So I want a large power source to heat my new real estate on the Jovian moons. I create a micro black hole (MBH), maybe a few kg, maybe more and drop it into Jupiter. I expect the following to happen [...
9
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2answers
420 views

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,...
5
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3answers
336 views

How can you set up a mine for the lower layers of the gas giants?

So in the story I'm writing, mankind has advanced farther in the next few decades than we have over the past couple thousand years. Colonization has allowed us to settle the planets, and the FTL drive ...
13
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3answers
532 views

Can life arise on a brown dwarf?

Brown dwarfs are celestial bodies in the gray area between planet and star. They're huge, gaseous, hot compared to planets, and come in all different kinds. (1) Is it possible for life to develop in ...
4
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2answers
850 views

Day and night cycles of a gas giant moon

Let's say that a gas giant (around the same size and distance from the sun as Jupiter) has a moon that supports life. The moon is around the size of Mercury (if this is too large please let me know). ...
3
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2answers
1k views

What would happen to the moon if the Earth was captured by Jupiter?

See this question for further details I also know how unlikely this situation is, so please refrain. From telling me "it won't happen." Jupiter is sent on a spiral into the inner Solar System. Both ...
3
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2answers
2k views

How much oxygen is too much? [duplicate]

A little while ago, I asked a question about how habitable a gas planet I created could be. Although I expected that the floating cities idea wasn't the most solid, I was surprised that one of the ...
3
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4answers
481 views

Maximum amount of habitable moons possible around this Jovian planet?

The gas giant has a mass of about 2.13 Jupiter masses in the habitable zone of a Sun like star 0.981 Sol masses, all the moons will need at least >0.12 percent of Earth's mass and a Mars like density ...
-1
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1answer
222 views

Dropping a Micro Black Hole into a Gas Giant [duplicate]

Update: Joe Kissling raised some important objections in the comments - I'll play about a bit with black hole masses and update my question accordingly - any answer along similar lines might be ...
8
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2answers
339 views

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, ...
8
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1answer
311 views

How do calendar systems arise? How would this affect a civilization's time-keeping if originating on the moon of a gas giant? [closed]

So I understand how gas giants and their many, many moons operate, and I can make educated guesses about how Earth-sized satellites could orbit a large gas giant, as well as how gas giants can be in ...
6
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3answers
618 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 ...
5
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2answers
460 views

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 ...
3
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1answer
328 views

What gravitational impact would moving Jupiter to the inner solar system have on the outer?

Based on my recent series of questions: here and here. The giant known as Jupiter has moved to the inner Solar System and Earth and Mars have become it's moons (despite all the odds). The moon of the ...
1
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1answer
161 views

Calculating Radiation Zones of Gas Giants and the Effects on Its Moons? [closed]

How would I determine the radiation fields, if any, of a gas giant planet? What effect would this have on its moons if they have magnetic fields like the Earth does, and are inhabited?
1
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1answer
109 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 ...