Questions tagged [planets]

For questions about any large astronomical bodies classified as planets, and their effects on their systems.

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1answer
83 views

3d printing Communism

Imagine this, Printing advances til everyone has one. 2030-50 timeframe There is a public utility Electricity credits are issued equally to everyone to run their printer Then people can make ...
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2answers
70 views

Adaptations for an ice planet?

My planet is a frozen world. Roughly the size of earth and in a perpetual ice age. The planet has very cold temperatures at night and during the day its surface becomes very bright. The intense solar ...
6
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1answer
100 views

What does and doesn't work with this planetary system around a red dwarf?

So I have the following scenario for a story, and I want to know if it runs into any ridiculous no-nos from a scientific point of view: There is an earth-like world orbiting a red dwarf (similar to ...
6
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1answer
116 views

How to calculate the average temperature of the hemispheres of a planet tidally locked to its star?

I have a planet orbiting a red dwarf and, as expected, it is tidally locked to its star. I know that these planets will have a very significant temperature difference between the diurnal and nocturnal ...
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10answers
248 views

What would be a good reason for space colonists to lose their technology?

In my universe, humans nuked themselves in a war so thoroughly that the Earth has been rendered uninhabitable. As a result, they have to leave Earth and find a new home. They briefly tried to settle ...
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16answers
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What plausible reasons why people forget they didn't originally live on this new planet?

It's a major step forward for humanity when they can finally live on a new planet. Maybe they went there out of desperation to survive, or maybe they simply want to explore. Either way, they suddenly ...
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6answers
281 views

How to dry an ocean planet and turn it into a salty desert?

I have a planet covered with a large shallow ocean, which extends over most of its surface. I want to turn this planet into a great desert, specifically a salty desert (the salts of this desert are a ...
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6answers
284 views

Could there be a planet where no electrical device works but that it can house life?

Far, far away from the Earth, there is a planet. A planet full of life. Where an intelligent species reign above all. But they haven't mastered the spirit of the thunder, and they will never. This ...
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3answers
763 views

Could a solar system exist inside of a nebula which is made of breathable gases?

Far, far away from the Earth, there is a nebula. An enormous cloud made of 78% nitrogen, 20% oxygen and 2% other non-lethal materials. These gases swirl around a star, and the pressure around it is ...
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2answers
165 views

How would iron smelting work in a planet with no oxygen?

Imagine a small planet, rich with iron, but with a negligible atmosphere, mostly devoid of oxygen. Once harvested, how could iron ore be smelted and refined into iron? And would the ore itself be ...
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3answers
182 views

How Likely is a Planet Made Almost Entirely of Metals?

For this question, the word 'metals' does not refer to elements heavier than hydrogen and helium. It instead refers to metals as defined by the periodic table of elements. After researching the ...
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1answer
111 views

Can a Planet's Electromagnetic Field Be Strong Enough for Wireless Electricity (Induction)?

Wikipedia states: "Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field." This one sentence ...
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2answers
152 views

Thunderstorms but with Fire!

The planet is huge roughly four times the size of earth, with lots of hydrogen in its atmosphere (group A water in Hydrogen out, B water out.) it is also very humid. what do I do to have giant Storms ...
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4answers
234 views

Cool way to see through fog and darkness

My planet is frequently set with thick fog. What is the best way to have its residents see accurately? One species called Hell Fires fall from the sky, landing on top of prey and killing it. How ...
5
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4answers
149 views

Can a Jupiter-Like Gas Giant Have Deep, Dark Storms?

For this question, I was inspired by the following image of the "Jupiter Abyss": What I want to know is, can a Jupiter-like gas giant have thousands of giant black storms, kind of like what I've ...
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4answers
113 views

Could a new planets plane be at a different degree as the other planets in our solar system?

I read this and wonder now, what if we would introduce a new planet to our solar system; would the force of gravitation demand a similar plane as that of the other planets? Mercuries 6.3° indicate ...
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2answers
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Would lots of hydrogen in a atmosphere cause Fire Storm [duplicate]

Basically Group A Breaths in water and out Hydrogen, Group B in Hydrogen and out water like us and trees but water and hydrogen instead of oxygen and carbon dioxide. Would the hydrogen in the ...
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1answer
105 views

Making a planet with high humidity

I'm making a Region of a planet with very high humidity, mostly covered in fog at ground level. I am open to having seasonal changes and would like there to be a few sunny days lets say 1 out of 15, ...
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2answers
145 views

Is an earthlike planet with ammonia oceans even plausible?

The idea of a planet where ammonia replaces water as the dominant liquid in the environment is quite popular in science fiction. I tried to develop a scenario where these kind of oceans are plausible ...
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4answers
2k views

How big would the ice ball have to be to deliver all the water at once?

One popular theory to explain how Earth got its water is that it was delivered by asteroid/comet/etc. The form this theory usually takes is that many small impacts occured over a long time, each ...
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19answers
7k views

What would influence an alien race to map their planet in a way other than the traditional map of the Earth

I was looking through a bunch of different ways we can shape a map of the Earth and it got me thinking. We map out planet as a stretched rectangle with NSEW as Up Down Right Left, with the Equator ...
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5answers
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Which place in our solar system is the most fit for terraforming?

Far in the future technology has evolved to the point that humanity is able to try and terraform something in our solar system. The moon is out, since it's too close to earth and therefore to risky, ...
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1answer
52 views

Maintaining Earthlike Gravity on other Worlds/Stations [closed]

I am writing my first short story in science fiction and am struggling with the issue of gravity. TLDR: What would it take to make a planet match Earth's gravity (e.g. Titan (yes, it's a moon but ...
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1answer
122 views

What's a Good Sphere-Mapping Resource?

After reading the help sections for asking questions, I am now confident that my question does in fact appear to be on-topic and in scope for this website. I currently use a page called PlanetMaker ...
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1answer
69 views

Creating a Realistic-Looking Rocky Moon

Originally I was going to ask for help in the process of designing moons in general, but this is such a vast topic that I decided to narrow it down. I'm trying to create rocky moons or planets. I ...
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3answers
4k views

Can planetary bodies have a second axis of rotation?

Is it possible for a planetary body to have a secondary axis of rotation? For example let's say there's an Earth-like body that is spinning with its North Pole facing the Sun. Imagine that the North ...
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1answer
83 views

A desert planet with temperate polar regions could sustain how much plant-life? Any?

One proposed type of desert planet is one in which the equator and the "tropics" are harsh, hot deserts, but the polar regions are temperate, habitable, and lush with life. You can see an example of ...
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1answer
96 views

Tidally Locked Planet, Weather

If the polar cap of a tidally locked planet was all ocean, what weather patterns would emerge? The ocean couldn’t be half frozen/half boiling, right? I need a weather pattern so the planet isn’t just ...
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3answers
147 views

Would an exoplanet highly rich in Iron (and other metallic properties) have any effects on technology?

Im working on a story about a new exoplanet discovery and its subsequent "Near Future" colonization. The planet is close to its parent star. As such, I have decided to give it a sizeable molten iron ...
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1answer
66 views

Gravitational and Electric Forces in the Movements of Planets

Now that we know about the electric nature of the cosmos, the question arises: "How much are planets affected by electric forces while moving through the universe?" We have been taught that the ...
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3answers
232 views

How Can I Explain a Giant Equatorial Gash?

I have a moon in my story that has a thin, deep gash or canyon that lies on its equator and spans the entire moon. My original idea involved the sudden orbital decay of a ring system, caused by a ...
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4answers
151 views

Human colonies beyond Pluto (on a potential ninth planet)

To be able to colonize another world, there are some requirements; the harvesting of energy, enough recourses, handling of the environment (pressure, temperature and gravity and so on) and ...
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1answer
111 views

Explaining Planet Colors/Compositions

I want to be able to explain: the coloration of my planets when I create them, but I don't have enough knowledge on the colors of elements or chemical compounds. I have done extensive research into ...
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1answer
950 views

If we were to assume the shape of planet Popstar from Kirby is kept that way artificially, how would the shape affect its day/night cycle?

Making a semi-realistic Kirby Alternate Universe (AU) here. Popstar's shape is a result of a member of this powerful race using secret magics to alter reality in this AU. What would its day/night ...
6
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3answers
296 views

Can a planets magnetic field be strong enough to make floating continents?

I have a planet similar to Venus(similar size and atmosphere) that has floating continents in the atmosphere due to strong magnetic fields. If it is possible, what would the continents need to be made ...
6
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2answers
104 views

How could a planet have traveling geographic poles?

I want to build a world that has its geographic poles travel like the Earth magnetic poles do. What is a plausible way to do this? (besides giving it two suns that is)
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1answer
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Changing air composition on another planet

Hypothetically speaking, if we would find another planet, the size of Earth, with atmosphere as dense as Earth's atmosphere is, and we would insert (in some hypothetical way) nitrogen, oxygen and CO2 ...
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4answers
3k views

Why would one hemisphere of a planet be very mountainous while the other is flat?

Background I just read this question about how to get a planet to have one hemisphere with tropical climate and one with polar climate. The (not yet accepted) answer with the highest score ...
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2answers
108 views

Can a planet mostly covered with water exist in a perpetual sunset?

I have read many posts about planets in perpetual sunset or twilight. Tidal locking, perpetual sunset at the poles of a planet with zero axis tilt, and so on. Great information by the way. This ...
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6answers
676 views

Can there be a unique planet visible each different month?

In my world, ten is an important number that shows up frequently. In the solar system my world belongs to, there are ten other planets beside it, and there are ten months in a year. I know next to ...
9
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1answer
191 views

What is the fastest an earth-like planet can spin and still support life, and would it be possible to launch space-craft from it?

I was wondering, if a planet in similar size and mass to earth would have, from its creation, been spinning at this hypothetical planet speed limit (with it somehow staying in once piece) could life ...
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17answers
7k views

How could a planet have one hemisphere way warmer than the other without the planet being tidally locked?

I would like a planet that's a tropical paradise on one side but covered in ice and glaciers on the opposite side, whether it be the Southern-Northern or the Western-Eastern hemisphere. I know it ...
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9answers
6k views

Can there be plants on the dark side of a tidally locked world?

In my story, there is an Earth-sized planet orbiting a red dwarf, tidally locked to its parent star, with large oceans like Earth, two moons similar to ours and a thick atmosphere to distribute heat ...
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2answers
127 views

Longest “linear” natural formations

In an effort to gain inspiration for planetary formation and, at the same time, inspiration for governmental/territorial boundaries between residents of said formed planets, I've recently encountered ...
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1answer
92 views

Earth like planet, more surface area under water?

Planet: earth like, half the radius of earth, gravity is .7g. Assuming this is possible and humans live on this planet, would it be possible to have 90% of the planets surface area be under water? ...
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4answers
869 views

Can this planet in a binary star system exist?

In a certain star system, Star B orbits Star A. Planet C lies in between the two stars and also orbits Star A. Planet C and Star B share an orbital period, and are at roughly the same places in that ...
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0answers
77 views

Super dense planet? [closed]

What's the most dense a planet could be and still be livable? How does water factor into the overall density of the planet. Is something like an osmium or iridium core even be possible/realistic? If ...
3
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4answers
233 views

Is it realistic to have a livable planet with a quarter the size of Earth, but with the same gravity?

So in theory, I would want this planet to have the same everything as earth besides the radius (and anything that affects how radius plays into gravity). I know the density of this Planet X would have ...
5
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1answer
88 views

Terraforming a tide-locked planet

Over several hundred years, a tide-locked, but otherwise Earth-like, planet orbiting a red dwarf is terraformed. The terminator is a very habitable zone, in terms of temperature, atmosphere, etc. ...
5
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1answer
97 views

How to find the density of a planet and its core taking into account the gravitational compression in them?

Consider a planet $P$ of radius $r$ larger than Earth, whose mass is $r^3$. By the square–cube law, this planet will have the same density as the Earth... assuming that the gravitational compression ...