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Q&A

Posts tagged planets

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Q&A How small in diameter a planet can be while retaining most of Earth's properties?

Suppose that I have a planet very similar to Earth. It has the same level of gravity, water-land ratio, temperature, air composition, rotation and revolution speed, tectonic activities, temperature...

2 answers  ·  posted 7y ago by 絢瀬絵里‭  ·  last activity 5y ago by 絢瀬絵里‭

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Q&A Atmosphere of habitable world around K-type star

I'm trying to work out the parameters of my planet, using the spreadsheets that Artifexian has developed (particularly this Planet Calculator and this Atmosphere Calculator) as a guide. In order fo...

2 answers  ·  posted 5y ago by Robbie‭  ·  last activity 5y ago by Robbie‭

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Q&A Plausibility of purple oceans

Alright, so I've been meaning to write out a planet with golden/yellow fields and a violet / purple ocean. What I was thinking about is having the water of this world is so clean and nourishing th...

3 answers  ·  posted 5y ago by Primicerius Kaine‭  ·  last activity 5y ago by Primicerius Kaine‭

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Q&A Plausibility of "diamond"-like crystal and/or mineral substances forming on a planet orbiting a dwarf star

Alright, so the primary inspiration for this is 55 Cancri e, the speculated carbon "diamond world" and to a degree, Nkllon, a planet in Star Wars that is essentially what Cancri is, but "confirmed"...

1 answer  ·  posted 5y ago by Primicerius Kaine‭  ·  last activity 5y ago by Primicerius Kaine‭

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Q&A What thickness of atmosphere and strength of magnetosphere would I need for a planet to have a deadly daytime and a hospitable nighttime?

What thickness of atmosphere, and strength of magnetosphere, would I need for a planet to have a deadly daytime and a hospitable nighttime? I'm wanting a planet in which humans can survive on as l...

3 answers  ·  posted 5y ago by Ushumgallu‭  ·  last activity 5y ago by Ushumgallu‭

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Q&A Object in the orbit or orbiting Uranus's moon Puck

I realize the response to this question is fairly involved but here goes. I need to have an alien spacecraft either in orbit around Uranus's moon Puck or somewhere in Puck's orbit around the planet...

3 answers  ·  posted 5y ago by James‭  ·  last activity 5y ago by James‭

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Q&A How to define operational altitude on other planets?

Since different planets have different gravity, atmospheric pressure, air density and composition, it's obvious that a definition of operational altitude based on earth sea level is inadequate for ...

4 answers  ·  posted 5y ago by Inquisitive Geek‭  ·  last activity 5y ago by Inquisitive Geek‭

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Q&A How would a planetary ring react to a magnetic field?

So for the story I'm writing, I'm designing is a gas dwarf with a very strong magnetic field and a planetary ring with a slightly inclined orbit. However, the rocks within the ring are very sensiti...

2 answers  ·  posted 7y ago by Mattias‭  ·  last activity 5y ago by Mattias‭

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Rigorous Science Black holes as heat sinks

Cooling in space is a well known difficulty. There are many unpleasant consequences like no stealth in space, difficult space battles which turn into a short wars of attrition (because you have to ...

3 answers  ·  posted 5y ago by Danijel‭  ·  last activity 5y ago by Danijel‭

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Q&A Dumbbell planet - how would humans cross the bridge?

Note: I am aware of this question Could two planets be tidally locked to each other so close they share their atmosphere? My question is not about that. It is specifically about human travel. By...

7 answers  ·  posted 8y ago by chasly from UK‭  ·  last activity 5y ago by chasly from UK‭

Question travel planets humans
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Q&A Is is plausible for an Earth-like planet to have all of its land located in one polar hemisphere?

I made a map for my fictional world and it would be convenient for the story to have all of it affected by a somewhat similar climate. The map is made of several pieces of a Pangaea-like continent...

4 answers  ·  posted 5y ago by MadCake - Reinstate Monica‭  ·  last activity 5y ago by MadCake - Reinstate Monica‭

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Q&A A pair of similar celestial bodies coming near each other

In my conworld I have two moons (they could be planets if desired as long as they can stay 'close' to a larger nearby body) of habitable size. I want to reality-check and provide an explanation for...

2 answers  ·  posted 5y ago by LambdaBeta‭  ·  last activity 5y ago by LambdaBeta‭

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Q&A Can a planet have a different gravitational pull depending on its location in orbit around its sun?

As the title say, can a planet have a different gravitational pull depending on its location in orbit around its sun? Is this explainable without magic?

6 answers  ·  posted 5y ago by Jae‭  ·  last activity 5y ago by Jae‭

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Q&A How to make plane without coal, steel and oil

My world is far away exoplanet with water and some oxygene, but without life or plants, which means without coal and organic materials inside. High tech people from Earth come there and made some ...

3 answers  ·  posted 5y ago by miki‭  ·  last activity 5y ago by miki‭

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Q&A Removing an atmosphere from a previously-habitable world

Alien AI DoomFleet has a mission: Destroy threats to their creator. They do this by detecting the signature of FTL drives, going to the system, and blowing everything up, up to and including the ho...

5 answers  ·  posted 7y ago by Andon‭  ·  last activity 5y ago by Andon‭

Question planets apocalypse
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Q&A Would a high gravity rocky planet be guaranteed to have an atmosphere?

I want to create a planet with a deep gravity well, say about 12G at the surface. At first I wanted the planet to have either no atmosphere or a very thin one. But I want this to be as close to rea...

4 answers  ·  posted 5y ago by Sean Kindle‭  ·  last activity 5y ago by Sean Kindle‭

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Q&A What factors determine a planet's gravity?

In Science Fiction we often see the protagonists exploring all sorts of strange new worlds with no apparent discomfort to the variations in gravity. What factors determine how strong the gravity w...

5 answers  ·  posted 9y ago by Liath‭  ·  last activity 5y ago by Liath‭

Question planets gravity
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Q&A Effects of a supermassive ship crash landing on a planet

My planet is a 20% larger than the earth, assume a similar atmosphere, but it can be changed to fit the narrative. My ship is not so large as in the original question, a cylinder shape, about a mi...

2 answers  ·  posted 5y ago by ordo fox‭  ·  last activity 5y ago by ordo fox‭

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Q&A Designing a super-comfortable Earth analog

Being an engineer and someone who hates hot summers and frigid winters, and someone who really likes the Rocky Mountain view, I can not help but wonder if we humans could get to design a whole new ...

2 answers  ·  posted 5y ago by Meatball Princess‭  ·  last activity 5y ago by Meatball Princess‭

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Q&A Carbon cycle on planet with mainly CO2 atmosphere

What effect would having CO2 in your atmosphere in place of, on earth, Nitrogen have on the carbon cycle? would the carbon cycle even work? I'm engineering A theoretical tidally locked planet with ...

2 answers  ·  posted 5y ago by Leo Fisher‭  ·  last activity 5y ago by Leo Fisher‭

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Q&A Is it possible to have a strip of cold climate in the middle of a planet?

Would it be possible to have a region on a planet that is not near its poles that has below freezing temperatures most of the year, while having more temperate regions both above and below it? If s...

11 answers  ·  posted 5y ago by Dave‭  ·  last activity 5y ago by Dave‭

Question climate planets
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Q&A The (Alternative) Reason for the Seasons: Highly Eccentric Orbit

On Earth, we experience seasons because of our planet's axial tilt. It is a common misconception that the seasons are instead caused by our planet's distance from the sun changing as it orbits....

1 answer  ·  posted 7y ago by ApproachingDarknessFish‭  ·  last activity 5y ago by ApproachingDarknessFish‭

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Q&A How far away from a Sol-class sun could a planet be and still be habitable?

In my galaxy, I need a planet that is far enough away from its star to be relatively cold compared to Earth, but not so cold that liquid water cold not exist. The planet has 2 continents, 1 northe...

4 answers  ·  posted 5y ago by The Weasel Sagas‭  ·  last activity 5y ago by The Weasel Sagas‭

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Q&A What are the day and night fluctuations for a moon orbiting a planet the size of Jupiter?

In a nutshell, I'm trying to build a world with erratic day/night cycles. To get the erratic days, I'm working with a habitable moon. It takes 3 full earth days (72 hours) for the habitable moon ...

5 answers  ·  posted 5y ago by Firelocke‭  ·  last activity 5y ago by Firelocke‭

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Q&A Meterology of double planets sharing an atmosphere

If two planets were tidally locked and shared an atmosphere, as described in this question, what would the weather patterns of the planets be like? What weather patterns would form, and could these...

1 answer  ·  posted 5y ago by tox123‭  ·  last activity 5y ago by tox123‭

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Q&A Types of life on a planet in a sun-synchronous orbit?

Basically, a sun-synchronous orbit is where one side of an object is always facing a star as it revolves around it (much like our Moon is, which is where the phrase 'dark side of the moon' originat...

3 answers  ·  posted 5y ago by Nathan Hopp‭  ·  last activity 5y ago by Nathan Hopp‭

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Q&A Would storms on an ocean world harm the marine life?

On a habitable world completely covered in water, with no land above sea-level, there would presumably be storms of biblical proportions. Suppose this world has oceans so deep that the deeper layer...

4 answers  ·  posted 5y ago by SealBoi‭  ·  last activity 5y ago by SealBoi‭

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Q&A How does steppenwolf planet generates typhoon?

In a distant future, a spaceship was investigating a gravitational anomaly somewhere within a chartered sector in the Andromeda galaxy. A disaster strikes and the spaceship was found marooned on a ...

2 answers  ·  posted 5y ago by user6760‭  ·  last activity 5y ago by user6760‭

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Q&A Planetary tidal locking causing asymetrical water distribution

Imagine a planet of roughly the same size as Earth with the same amount of land, the same atmosphere and the same proportion of water (other planetary parameters may vary from Earth like) that has ...

2 answers  ·  posted 5y ago by Slarty‭  ·  last activity 5y ago by Slarty‭

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Q&A If we put humans on planets with atmospheres different from Earth's atmosphere, but still containing oxygen, would humans be able to breathe?

From Wikipedia: By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. For example, would humans be able to survive ...

6 answers  ·  posted 9y ago by BuildingBetterWorlds‭  ·  last activity 5y ago by BuildingBetterWorlds‭

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Q&A Will winds always be the same?

Around Earth's equator, there's a band of low pressure called the Doldrums. 30 degrees north and south are bands of high pressure called the horse latitudes. Finally, there are more low-pressure ba...

2 answers  ·  posted 5y ago by SealBoi‭  ·  last activity 5y ago by SealBoi‭

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Q&A Can you critique my sea temp map and answer a couple of specific questions?

I'm working on yet another iteration of a world map project. I'd like to ask for some opinions on the sea temperature map I've done: I also have a few specific questions about some areas on the...

1 answer  ·  posted 5y ago by EojjN‭  ·  last activity 5y ago by EojjN‭

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Q&A What's the minimum time that it would take for an advanced species to create an ecumenopolis?

In figuring out the rough timeline for my sci-fi, I've run into an interesting dilemma. As it stands right now, There are about 90 years in between one of my civilizations discovering space travel ...

2 answers  ·  posted 5y ago by greenmaster‭  ·  last activity 5y ago by greenmaster‭

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Q&A Is it possible for the remnants of a planet to be locked in orbit around another in a dual planet system?

I'm envisioning a double-planet system where both orbit around a central point. One planet is approximately Earth-sized, while the other is about one-tenth the size. One of the planets (the smalle...

3 answers  ·  posted 5y ago by Akash kapur‭  ·  last activity 5y ago by Akash kapur‭

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Q&A Earth like planet with two moon like satellites

I was thinking about this world with different ancient factions on war. The war caused both of them and most life on the planet to die, I was thinking about one of the moons getting shattered as a ...

3 answers  ·  posted 5y ago by hOlim‭  ·  last activity 5y ago by hOlim‭

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Q&A What could trigger powerful quakes on icy world?

Imagine a planet orbiting a star some billions of lightyears away from us, the planet is 4 times the mass of Earth and is covered with ice 100km thick on average. It is believed that liquid ocean e...

5 answers  ·  posted 5y ago by user6760‭  ·  last activity 5y ago by user6760‭

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Q&A What 4D shape could best fit a looping world?

I have an idea for a world such that the world itself is like a large loop. The best way I can think to describe it is going step by step through the "loop". Imagine a planet-like object; a sphere...

3 answers  ·  posted 5y ago by Iter‭  ·  last activity 5y ago by Iter‭

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Q&A 160 Year Solar Orbital Period & 1.9 Year Moon Orbital Period - Is it possible?

A defining factor of my world is the hardships inhabitants have to face when surviving long seasons. Due to the extreme length of a year, time is largely measured by moon cycles. I need to make sur...

5 answers  ·  posted 5y ago by DorianHuxley‭  ·  last activity 5y ago by DorianHuxley‭

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Q&A How to make a rogue planet liveable?

Rogue planets are generally not to healthy for us humans to live on. No permanent source of heat or light means that generally they are a pretty cold place. Plenty of other problems arise too, but ...

6 answers  ·  posted 8y ago by QuiquÈ…‭  ·  last activity 5y ago by QuiquÈ…‭

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Q&A How do I calculate sea level on a planet with no seas?

On one (of many) of the planets that I am planning out, there are no seas. The planet is mainly composed of enormous mountains, with some deserts in between. There are no seas or large bodies of w...

7 answers  ·  posted 8y ago by QuiquÈ…‭  ·  last activity 5y ago by QuiquÈ…‭

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Q&A How do I figure out temperatures and amount of sunlight for a world?

How do I figure out the temperatures of certain latitudes on a planet with factors such as sunlight and the emission of heat and energy from a planet's interior? Assume the planet is smaller than E...

2 answers  ·  posted 5y ago by user61505‭  ·  last activity 5y ago by user61505‭

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Q&A Is it possible for a planet to have a liquid ring?

Is it possible for a planet to have a liquid ring rather than a ring made of solid particles? If it is, how long would it be stable for? If not, is there any other configuration of a liquid that c...

4 answers  ·  posted 6y ago by Slarty‭  ·  last activity 5y ago by Slarty‭

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Q&A Designing the most boring planet ever discovered. Part 1: planetary surface

@Gryphon has made me aware of this The Least Interesting Substance It is very close but I need a planet that can form naturally. Would any of the substances mentioned in answers to that question b...

4 answers  ·  posted 5y ago by chasly from UK‭  ·  last activity 5y ago by chasly from UK‭

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Q&A Can a planet be tidally unlocked?

In my answer to another question, I suggested that the Super-Earth in question be tidally locked to its host star for a period of time while part of its surface experienced a bombardment. After tha...

13 answers  ·  posted 5y ago by HDE 226868‭  ·  last activity 5y ago by HDE 226868‭

Question planets tides
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Q&A Properties of a planet roughly four times as big as Earth

I have some research I want to do about a planet for a novel I'm writing. It is a fiction/science fiction novel, but I do wish to actually have some parts of the world correct in the scenes I depic...

2 answers  ·  posted 5y ago by GaryS‭  ·  last activity 5y ago by GaryS‭

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Q&A How to explain one side of Super Earth is smoother than the other side?

A spaceship flew across an unclassified region of the Milky Way galaxy and found a Super Earth in an unnamed system. The planet is almost twice as massive as Earth and is orbiting fairly far away ...

8 answers  ·  posted 5y ago by user6760‭  ·  last activity 5y ago by user6760‭

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Q&A Terraformed Venus and Mars

A Traveler from a very advanced civilization has visited the Solar system. He found the humans likable, and decided to leave them a boon. For some reason, he couldn't do anything directly to the Ea...

2 answers  ·  posted 5y ago by Alexander‭  ·  last activity 5y ago by Alexander‭

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Q&A Water planet turns into desert world without being rendered uninhabitable

A habitable (human could survive in its atmosphere without suits) desert planet which used to have large oceans is quite common in ScFi. I was thinking about the processes which could have been res...

4 answers  ·  posted 5y ago by TheDyingOfLight‭  ·  last activity 5y ago by TheDyingOfLight‭

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Q&A How can this habitable planet have a moon with a naturally occurring atmosphere?

Assuming the planet is earth-like, with more surface water and atmospheric oxygen, and within the habitable zone of a sun-like star, how can a moon orbiting this planet retain a thick atmosphere? ...

5 answers  ·  posted 5y ago by Tardigreat‭  ·  last activity 5y ago by Tardigreat‭

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Q&A Origin of life on a waterworld

Take a planet like Gliese 1214 B, which has no land, an ocean 100s of kilometres deep and a seabed of Ice VII. For the purposes of the question, let's assume that the pressure and/or temperature ne...

1 answer  ·  posted 5y ago by SealBoi‭  ·  last activity 5y ago by SealBoi‭