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Questions tagged [habitability]

For questions asking about the conditions which are required for the development of life as we know it.

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Precipitation on an outer exomoon heated by tidal heating

Following this question, how would rain behave on an outer system habitable moon (>5AU from a sun-like star) heated by tidal-heating? According to this page, an outer planet or moon with low ...
casualworldbuilder's user avatar
3 votes
1 answer
101 views

Stability in my habitable planet orbiting a binary system (Solved)

I'm making a worldbuilding project mainly focussed arround an habitable planet that orbits a binary system and I have a question about my system. My planetary system is an S-type (A main star in the ...
Paleoaster 3d's user avatar
6 votes
3 answers
2k views

Could Jupiter-like planet be able to radiate energy to sustain life on satellite?

I remember being taught about Jupiter being believed to be a failed Sun. I also am aware that Jupiter releases energy like the Sun. I am sure some of this is in relation to the sun as well. But due to ...
Silas's user avatar
  • 61
2 votes
0 answers
24 views

Why are the flux limits larger for low-temperature stars? [migrated]

When calculating the habitable zone of a star, the minimum and maximum stellar flux limits compared to Earth seem to be larger for stars with lower temperatures. Why is that?
Sussus Amogus's user avatar
3 votes
2 answers
113 views

Causes of extreme seasons on an Earth-like planet such that humans need to migrate

I am thinking of an Earth-like planet that has extreme seasons (temperature) such that the humans (or other lifeforms) living there need to systematically migrate (probably twice per year) from one ...
Blair Nangle's user avatar
1 vote
0 answers
36 views

What should the core mass fraction of a habitable planet that orbits very close to a dwarf star be to ensure electromagnetic protection from flares? [closed]

After reading this question, I became quite worried about my own habitable world with similar characteristics. Even worse, my star is presumably much younger -- only 8.787 Gyr (out of 50.207 Gyr). ...
Aster's user avatar
  • 341
6 votes
3 answers
293 views

Can a planet with rings support life?

Is it at all possible for complex life to evolve and exist on a planet with rings? I assume the rings would have to be rock, since if the planet is to support life, it will have to be in the habitable ...
mza's user avatar
  • 161
7 votes
2 answers
336 views

Could a cold-cored planet be protected by a hot-cored moon?

This is an earth-sized planet, unable to produce an adequately protective magnetic field. Could a moon with a hot, iron/nickel core produce a magnetosphere large enough to encompass the planet and ...
Valitenci's user avatar
  • 508
1 vote
1 answer
111 views

Atypical Habitable Planets - Planets Outside of Typical 'Habitable Zone' With Characteristics Still Conducive to Life

Warning: I am wordy and I overexplain things. I'm also Autistic, so I may come off as odd or unusual (and that also feeds into why I overexplain LOL). I'll do my best to be clear and concise, but you ...
Kunabee's user avatar
  • 13
2 votes
2 answers
152 views

What is the albedo of a habitable planet?

What is the albedo range for an Earth-like planet? I need to know because it's important for determining the inner and outer edges of the habitable zone. I'm thinking in terms of cloud/water-ratio (I'...
Sussus Amogus's user avatar
3 votes
2 answers
701 views

What atmospheric composition would this planet need for an avg. temperature of 50 Celsius?

Planet Info: Star: 1.25x solar mass / F6V Type / ~6300K / 1.97x Luminosity Planet is 1.84x Earth Mass, same density as Earth Orbiting at 1.42 AU atmospheric pressure is 3.68atm Inputting these ...
Foosic17's user avatar
  • 1,266
8 votes
3 answers
293 views

How to protect a water planet within a water ring of a quasar from radiation?

Tags: science-based habitability radiation I am using this discovery as my starting point (Source) An international team of astronomers led by the California Institute of Technology and involving the ...
Thunderhammer's user avatar
5 votes
0 answers
90 views

What is the largest apparent size a moon of a habitable planet can have? [duplicate]

Inspired by this question: How large can an apparent size of a moon be? I am looking for a moon that is: a terrestrial moon with properties vaguely similar to Luna (not a binary planet, but it can be ...
casualworldbuilder's user avatar
5 votes
2 answers
277 views

On Habitable Moon Systems

Context I was working on a habitable gas giant moon, but I came across an issue in that, at the acceptable distances from its parent planet (10-20 planetary Radii, according to an Artefexian video on ...
DanceroftheStars's user avatar
2 votes
2 answers
308 views

Can a Super-Earth have a large moon?

I'm writing about a Super-Earth which is habitable and has a large moon, but I want to get one thing out of the way: can a Super-Earth have a large moon? Wouldn't the Super-Earth pull on the moon, ...
Jerry Robinson's user avatar
-1 votes
1 answer
79 views

Local surface warming on a rogue planet [closed]

There have been several previous questions about geothermal warming of a rogue planet with regard to depth: how much overlying atmosphere, water, rock do you need for a given geothermal flux to ...
rwallace's user avatar
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1 vote
2 answers
212 views

Could humans live on a cylindrical celestial body?

Let's imagine a roughly (or perfectly?) cylindrical celestial body. Other than it's shape, everything about it astronomically (distance from sun, orbit shape, etc.) is the same as Earth. Is it ...
Mocascoolai's user avatar
4 votes
3 answers
1k views

Is this ocean-planet stable?

I'm building a cold, water-based ocean-planet for my current setting, its temperature being below 0°c at all times and in all of its regions. Even despite the freezing temperatures, the planet's ...
NimRad's user avatar
  • 1,222
6 votes
6 answers
2k views

How possible is a habitable, liquid ocean-planet at temperatures below 0°C?

I plan on having an ocean-planet with a breathable atmosphere built into my current setting, orbiting its host-star (a K4v main-sequence star) a short distance beyond its frost-line, with oceans that ...
NimRad's user avatar
  • 1,222
4 votes
2 answers
595 views

Would an increase in star density affect the "Goldilocks Zone"?

Let's say that there's a solar system that matches the description of Sol exactly, save for the fact that it's 20,000 light years closer/farther to the galactic center. Would the zone of one ...
Jarren_Takar's user avatar
4 votes
2 answers
238 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
  • 8,657
7 votes
3 answers
329 views

How far from a habitable planet must a red giant star be to not seriously affect it?

Can a habitable planet having complex life exist in a binary star system with a Red Giant? I am not talking about close binaries, but distant binaries (100 AU or more). Planets can orbit some smaller ...
Bedlasky's user avatar
  • 131
1 vote
1 answer
153 views

Could a planet in Alpha Circini system have developed carbon-based life?

For my story, I'm searching for a home star of one of the alien civilisations. Due to the desired region in space, I have now set my eyes on the Alpha Circini system (HIP 71908, HD 128898, GJ 560). I ...
Krišjānis Liepiņš's user avatar
4 votes
2 answers
192 views

Do the parameters for this moon work? Will it be habitable?

I was wondering if the parameters for this world will work. It doesn’t need to be pleasant for humans but it will have at least multicellular life. Object name: Adii-1 Mass: 0.33334x Earth’s Mean ...
casualworldbuilder's user avatar
2 votes
1 answer
146 views

How do I make an Earth-like habitable planet tidally locked to a red supergiant (class L or M)?

Assuming tidally locked planets have the potential to be inhabitable: Is there any way for a planet of Earth-like size to become tidally locked to a red supergiant of class L or M?
Mensch79's user avatar
-2 votes
2 answers
216 views

Habitable moon and hycean world [closed]

A hycean world is a cross between a rocky planet and a gas giant. Think an ocean world with an atmosphere full of hydrogen. Assuming it is in the habitable zone of its star, could a habitable moon, ...
Joe Smith's user avatar
  • 3,192
3 votes
3 answers
1k views

Could my planet be habitable (Or partially habitable) by humans?

Set up I'm currently building a planet that I want to have both alien life forms and humans. It has the following traits: Humans migrated from Earth a long time ago, but only landed on the planet 24 ...
TheDarkeLordeReturns's user avatar
2 votes
2 answers
365 views

How deep would a canyon on this planet have to be to have an earth-like atmosphere?

I have, for a while now, been intrigued by the planet Canyon in Larry Niven’s Known Space universe: Canyon was once an uninhabitable Mars-like world known as Warhead. It is the second of seven ...
user98816's user avatar
  • 8,657
1 vote
3 answers
158 views

Could humans survive inside the caldera of an extinct volcano on a very hot planet?

I was inspired by Dune, where the characters can't really go outside during the day (at least for long) because it's so hot, so they stay inside these massive buildings. On a planet which is very hot (...
DMacc1917's user avatar
  • 956
2 votes
5 answers
410 views

Could humans possibly survive on a shallow ocean planet with scarce, but large, volcanic islands?

[edited after feedback in comments] I've had an idea for a story that takes place on a planet that is primarily shallow oceans (average depth of no more than 100m or so, max depth of no more than ...
DMacc1917's user avatar
  • 956
7 votes
6 answers
1k views

What is the maximum amount of land (percentage-wise) a habitable planet can have?

Earth is our only example of a habitable planet. The surface of Earth is 29% land and 71% ocean. I am wondering what other land ratios can create a habitable planet. Half a billion years ago, Earth ...
Rhymehouse's user avatar
  • 3,679
5 votes
4 answers
3k views

How long can a shattered Dyson Ring support life?

Now I recently had an idea for a setting and villain backstory and thought might as well get it vetted. Once, there was a mighty Empire that had conquered its home system and converted most of the ...
Jacob Badger's user avatar
  • 2,333
6 votes
2 answers
304 views

What effects would a Jupiter-like gas giant's magnetosphere have on a human civilization on its habitable exo-moon?

Background: Like many others here, I'm building a world for a story I'm writing. I'd like it to be taken for granted that a moon roughly the size of Earth that is habitable for humans could exist in a ...
bnbaum's user avatar
  • 89
5 votes
1 answer
273 views

Must a habitable planet's moon be tidally locked, and why?

Artifexian in his Worldsmith and other videos of his recommends a moon of a habitable planet must be a tidally locked moon. But why is that? I fail to understand how rotation of a moon about its axis ...
Ylahris's user avatar
  • 487
3 votes
2 answers
205 views

In a world where gravity pass from 1 G to 5 G in a cycle of 365 days, can planes fly all the time?

I am writing a book and I have this cenario. There is a planet where gravity pass from 1 G to 5 G in a cycle of 365 days. I know that humans can survive till 3-5G, but what about airplanes capability ...
Alessar's user avatar
  • 521
5 votes
1 answer
323 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
  • 8,657
9 votes
3 answers
1k views

How do I determine the habitable zone of a binary star system?

Suppose two stars orbit each other and the planets orbit around the two stars' barycenter. I'm thinking of having at least one as a main sequence G or K class. For the sake of argument, let the other ...
Ylahris's user avatar
  • 487
4 votes
3 answers
340 views

An Earthlike World Placed Around a Blue White Dwarf

A star that is bright, gives off blue light, and can have a world that mimics conditions on Earth is tricky. I'm hoping I can get one around a blue-colored white dwarf star. What does the arrangement ...
DWKraus's user avatar
  • 63.7k
6 votes
6 answers
244 views

Why would a near future society struggle to grow crops on a large level?

I have a world where its mostly in ruins. But its run practically by corporations and smaller factions. A large part of the world is recovering from ecological collapse, massive pollution that travels ...
FIRES_ICE's user avatar
  • 3,143
3 votes
2 answers
323 views

Can a habitable S-type planet and three habitable P-type planets exist in one binary star system?

In this solar system are two stars, named Genesis and Exodus. Currently, I don't know the types because the need of habitability on the planets might affect the requirements for these stars. They ...
raevynn's user avatar
  • 335
6 votes
4 answers
1k views

What is a reasonable day length for a planet with 4 times earth radius?

The fictional planet has a mass of 18 times Earth's and four times earth's equatorial radiusreference. This gives it a gravitational acceleration of 11.02m/s^2 (1.29G) and an escape velocity of 23....
Mindwin Remember Monica's user avatar
4 votes
1 answer
87 views

Planet Orbital Zone and Year Length

So I'm building a fantasy world that takes place on a planet with a circumference of about 18,500 miles (it's average temperature is 40℉), and it orbits a Blue-Giant. How long would a year be, and how ...
CaptainYulef's user avatar
5 votes
1 answer
211 views

Daily eclipses for a moon orbiting a gas giant?

I've dug into the idea of a habitable moon getting daily eclipses due to its gas giant getting in the way of the sun; but most examples I've found specify a tidally locked moon. I'm no astrophysicist ...
Deep Stone Costco's user avatar
7 votes
8 answers
2k views

Is life feasible in an inhospitable binary system?

There is a planet orbiting a binary system inside the Goldilocks zone. The problem is that the binary system is of a violent kind. It either regularly explodes and sterilizes a portion of the planet's ...
Andrey Godyaev's user avatar
8 votes
3 answers
409 views

How much more mass does Mars need to have in order to still be habitable today?

In an alternate timeline where Mars is the second Earth-like planet in our Solar System, the drive for colonizing it would perhaps have been much stronger. There would've been more resources spent ...
Hanhan658's user avatar
  • 569
19 votes
12 answers
4k views

What would cause plants to survive on the ground while restricting animals to the air?

What would be the natural reason for the surface of a planet to be toxic or otherwise uninhabitable to animals but not plants? This planet is not Earth and life would have evolved this way from the ...
Juliette's user avatar
  • 341
4 votes
2 answers
338 views

What geographic changes need to occur to make Southern Australia fertile?

Currently, 90% of Australia's land is inhospitable desert. What geographic changes need to occur for its southern side to become fertile soil?
Bangerblade's user avatar
4 votes
2 answers
112 views

What would happen on a binary planet if they captured a new moon into orbit?

I've been working on a world where the origin of the magic system is a catastrophic event that ripped the surface of the planet apart allowing magical energy from beneath the crust to escape to the ...
Jasmine's user avatar
  • 41
2 votes
5 answers
149 views

How could large scale mining operations render an arid region unlivable?

A story I am working on sees the characters returning to a fairly arid planet that was mined heavily by an interplanetary corporation. This left most of the planet uninhabitable and forced the local ...
user16768946's user avatar
2 votes
1 answer
110 views

Consequences of living on either of two habitable planets orbiting a super-Earth? [closed]

I'm working on a habitable planetary system just at the doorstep of the Solar System. I'd like it to be unique, so I'm thinking of using two habitable planets orbiting a super-Earth. The super-Earth ...
CuriousMoron's user avatar

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