Questions tagged [gas-giants]

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

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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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1answer
158 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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183 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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1answer
147 views

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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1answer
169 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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1answer
307 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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1answer
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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2answers
197 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,...
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3answers
911 views

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 ...
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1answer
118 views

Could this moon of a gas giant orbiting a neutron star support life?

Making the following assumptions: 1. The three moons of the Gas Giant are safe enough distances from and massive enough not to pull each other apart or send themselves careening into the void. 2. ...
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2answers
93 views

What are some plausible formation explanations of a non-hot “Fluffy” Gas Giant planet?

So, in my research and preparation for the question I asked immediately before this one, I was introduced to the concept of "fluffy" gas giants, gas giants with significantly lower density than would ...
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380 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 ...
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3answers
470 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 ...
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195 views

Are there any plausible 'alternative' methods of planetary formation?

The selected answer on this question provides an extremely good, and detailed, description of what is generally accepted to be the main (only?) way a terrestrial planet can form, i.e. through ...
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381 views

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 that ...
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1answer
572 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). ...
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2answers
134 views

Added Difficulties of Space Flight on Gas Giant Moons?

What additional difficulties might the inhabitants of a gas giant moon face when attempting to launch spacecraft beyond their moon's orbit, especially beyond the planetary system? I presume that they'...
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1answer
207 views

What would be the composition of a habitable gas giant

Lets imagine a gas giant called Eurus. It would have a diameter a bit smaller than saturn, but a gravity weaker than earth (92% earth's gravity). It would also be located 15 000 000 km away from its ...
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1answer
104 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?
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1answer
86 views

Calculating The Albedo of a Gas Giant With Earth-Like Moon(s) [closed]

How can you determine how bright a gas giant would be, especially if it has inhabited moons with an Earth-like atmosphere?
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2answers
136 views

How Large Would A Gas Giant Appear To Be To The Inhabitants Of An Earth-like Moon Orbiting it? [duplicate]

How large would a gas giant realistically appear to be on an Earth-like moon? I think a movie or two has portrayed them as very large, but that's an exaggeration, right? Depending on the size and ...
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1answer
143 views

Would An Earth-Like Moon Be Tidally Locked? [duplicate]

Could a moon of similar size to the Earth orbiting a gas giant be tidally locked compared to its host planet? What effect would that have on the moon, especially the biosphere?
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How do I design the solar transit of a hot Jupiter?

BACKGROUND The world I'm designing currently has a gas giant of the type known as a hot Jupiter orbiting close to the sun and causing solar flares. I would like the inhabitants of my Earth-like world ...
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170 views

Is this gas giant possible?

I want to create a gas giant planet. The parameters I would like for it to have are: It should have a large layer of gas within its atmosphere that living creatures including humans can survive and ...
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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 ...
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3answers
176 views

How can perpetually-gliding lifeforms develop space travel?

Malgrovian gliders inhabit the middle layers of the atmosphere of Malgrov, a gas dwarf. They spend most of their life gliding, preying on giant balloon-like floating lifeforms. When they get older, ...
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1answer
88 views

Building a drone for gas giant flight: Lightning considerations

A previous question's answer established that naturally occurring positrons could be gathered through positron-emitting isotopes. I've started looking into means that these isotopes could be gathered ...
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3answers
619 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 ...
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3answers
415 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 ...
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2answers
117 views

How to determine the temperature of an Earth-like planet with two major heat sources?

Ghyesh is an Earth-like habitable moon that orbits a gas giant in a system with a sun significantly larger and hotter than Earth's. Both the gas giant and the sun emit an equal level of heat to the ...
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2answers
568 views

Is this habitable moon possible?

I've already asked a similar question but i'd like more details. This moon would be orbiting around a saturn like planet without rings. The host planet would be located in the habitable zone, ...
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5answers
263 views

Effects of regular prolonged eclipses on environment

What would be the effect on climate on an Earth-like moon of a gas giant, which experienced regular ("monthly") total solar eclipses (by its gas giant parent) lasting approx. 40 hours. I'm trying to ...
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533 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 ...
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2answers
991 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 [...
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1answer
210 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 ...
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9answers
302 views

What could cause a difference in coloration between the hemispheres of a gas giant?

Would it be possible for a gas giant to have differently colored hemispheres? E.g. the northern hemisphere appearing blue when looked at, while the southern hemisphere would appear brown? (or any ...
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1answer
441 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, ...
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3answers
265 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 ...
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4answers
929 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, ...
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4answers
270 views

Could this work? How to? Terraformed gas-giant

I have an idea for a scify/lost technology world, that I would like to check the plausibility of. What I want A terran world of large size. The crust of the world is thin, and hostile gas-organisms ...
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3answers
458 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 ...
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1answer
440 views

How much space is needed to feed 30,000 people? [duplicate]

also how much space is needed for 30,000 people? I need to build an orbiter that will feed and make sure 30,000 people survive on Jupiter.
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1answer
164 views

Multiple moons orbiting a gas giant: How would I calculate how long it appears for a closer moon to orbit the planet from a further-out moon?

I have a habitable moon orbiting a gas giant, and there is another moon orbiting the planet on a closer orbit. The cultures on the near-side of the further, habitable moon use the transit of the ...
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2answers
679 views

Earth-like moons orbiting around a gas giant

I have a world idea (and definitely not the only one with such an idea in which the main location is a moon of a gas giant, that has life like on Earth. What are the effects of the presence of the ...
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1answer
292 views

Can I have my blue/green habitable Gas Giant? [duplicate]

For my current Eclipse Phase campaign/Fan Fiction I set up a "habitable" Gas Giant, by habitable I mean, that there is a layer in its atmosphere, where 1 bar of pressure and a temperature of ca. 283 K ...
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1answer
458 views

Timekeeping Systems on a Habitable Moon

Ok, this is take two. Hopefully this is specific enough. I have a link to the original question here. And for those of you eager to see my sources for this, I'll link two videos here from the ...
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1answer
282 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 ...
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2answers
240 views

Planetary system with a solar eclipse every day - need help designing

I have a habitable moon orbiting a gas giant. The moon is not tidally locked with the gas giant. The orbital plane of the moon around the gas giant is the same as the orbital plane of the gas giant ...
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3answers
369 views

How to create a “twilight” world around a red dwarf star

I'm looking to build a "twilight" world, where days are like twilight even when the sky is clear and nights are...very dark. Cloud cover might be able to turn day to an early night. I do envision a ...
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5answers
647 views

Is it possible to transform Jupiter into micro-star?

For fusion to occur we need extremely high temperature at the core to overcome coulomb barrier or for the nucleus to be close enough to tunnel into each other. Is it possible for type 2 civilization ...