All Questions
Tagged with planets habitability
129 questions
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If ancient Venus really were once habitable, what was its atmospheric composition and average surface temperature? [closed]
Some sources claim that billions of years ago, Venus may have had much cooler temperatures, enough for liquid water on it’s surface and these clouds on the day-side of Venus would raise Venus’ albedo ...
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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 ...
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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 ...
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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'...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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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....
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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What would be the effects on climate on a Venus sized planet orbiting a K0V star in a similar manner to Mars?
The planet has the characteristics of Venus in terms of mass (0.815 Earths), density (5.243g/cm3), surface area (0.902 Earths) and gravity (8.87m/s). It has an Earth-like atmosphere,water covers about ...
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How far away would you need to be to survive a jet of stellar plasma on the surface of a "planet" built around a sun?
So, I'm considering writing a story, and one of the settings is a world created by a powerful wizard millions of years ago, by opening a thousand portals to gate in a thousand Earth-like worlds that ...
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How Do I Make Trappist-1g Habitable (in a fantasy setting)
This question is not about terraforming! (or atleast not technological terraforming)
I am writing a fantasy story set in the (real) Trappist-1 system. I am trying to faithfully keep most of the ...
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Would life be possible on a planet whose poles each directly face the sun once a year?
There is a kind of planet that I'm curious about regarding its habitability. Basically it's a planet that's very earth-like as far as its mass and material and atmospheric content and rotational/...
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Feasibility of the Ascendia System?
Some of the events in a story I'm thinking of have occur on a planet called Ascendia. Due to the world's backstory, it has several unusual traits.
Despite orbiting around a hot (roughly large F/small ...
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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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Calculating the Atmospheric Properties of an Exoplanet
I am developing a double-star system filled with several planets, a few of which will be habitable. I also have a spreadsheet file full of all the planets information, from Semi-Major Axis, orbital ...
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How Habitable are these Planets?
For the book I'm writing for my world, Damarian, the villains of the series (The NUSA, America's descendant) are banished off Damarian (Spoilers). The banished are shipped off, but 3 groups formed, ...
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Why is this planet such a bad place to live? [closed]
Admiral Edwin Witt was obsessed with discovering a habitable world so future generations would remember his name. After decades of searching, he found a world that challenges the very definition of ...
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Would this planet be habitable for intelligent lifeforms
I am trying to make a universe using math and this is a planet from the first solar system I am making. Firstly the star. This star, which I don't have a name for, has a mass of 1.3 solar masses, a ...
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Reef World 4 - Flora
Piggybacking on the previous “Reef World” questions.
Let’s talk Flora and how it adds to life and the environment on Reef World.
The entire planet is mostly covered in shallow ocean, but not ...
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Can a water world be turned into a dryer habitable planet by an early runaway greenhouse effect?
Consider an Earth clone with oceans several hundred kilometers deep, potentially deep enough to solidify into exotic ices. Such a planet would lose its initial hydrogen and helium atmosphere when the ...
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Placing a planet on the famous Escape Velocity Graph
If I'm understanding the chart correctly, in order for a planet with lower gravity than Earth (smaller than Earth), but with decent magnetosphere, to hold on to an atmosphere with oxygen, and water on ...
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Binary planets system day/night cycle
My story has two planets separated by ~35,000 miles of empty space- tidally locked through a magic "planetary anchor" light rope that connects the two planets and keeps them at that exact ...
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What if a moon orbits far away and extremely fast?
Imagine an Earth-massed moon orbiting around a Saturn-massed planet in a period of 28 days. This calculation tells me that is possible if the moon is 1.8 million km away. If so, the moon must be ...
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Geology and climate etc on a earth size habitable moon of a gas giant [closed]
A bit of background:
I'm in the beginning stages of creating a habitable moon orbiting a gas giant. The conditions I have so far for this are:
The moon itself is more or less Earth-size, and the gas ...
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What (if anything) can cause a substantial and stable shift of the magnetic poles of a habitable planet away from its geographical ones?
Most planets have magnetic poles that align pretty well with their geographical ones. On earth, for example, the magnetic dipole field is tilted about 11 degrees from the rotational axis. As far as I ...
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Tidally Locked Planet with no Oceans
Picture an earth-mass, breathable atmosphere planet; tidally locked to a red dwarf; orbiting far enough out that the dayside is not scorching; and with no planet-wide liquid oceans (but probably local ...
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Habitable low mass super earth and its habitable high mass moon feasability
So, I've got a fantasy world where there is a super-earth with Earth-like gravity (aim is approximately half-again the diameter of Earth) that is the homeworld of non-native humans(introduced to the ...
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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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How could a rocky planet be tilted on its side?
I want to experiment with a rocky planet that's tilted on its side like Uranus. But first I of course need some way for this to happen without destroying any chances of the planet being habitable. ...
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Could a world with a extremely bright night sky exist?
How could an Earth-like tidally locked planet with no Moon have a bright and livable night sky?
The bluish night sky should look like this:
But it should be 1% as bright as Earth's day sky and ...
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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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Are these traits for my planet mathematically accurate? Could it support life?
Mass of star: 0.75 M☉
Radius of star: 0.69 R☉
Surface temperature of star: 4,620° K
Luminosity of star: 0.2 L☉
Satellites: 2
Place in solar system: 2nd
Mean radius: 8,725.1 km
Mass: 2.57 M⊕
Mean ...
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How Would I Make an Oceanless World Feasible?
The planet I'm thinking of is of similar size and distance from its star relative to Earth, but it lacks oceans, instead consisting of one massive continent with a huge mountain range (reminiscent of ...
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Feasibilty of binary planet having life
So far I've designed two planets, and would like for them to orbit each other at a distance of roughly 1.25 million km (both planets would easily stay in the habitable zone), the smaller being tidally ...
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Are Geologically Dead Planets Habitable?
One of the planets I'm thinking of for my book series has all of its landmass in the northernmost half of the northern hemisphere (it is thus mostly a water world) and is completely geologically dead. ...
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