Questions tagged [earth-like]

For questions regarding planets similar to Earth in most respects. This tag should be used when describing a planet that follows the rules of Earth with exceptions outlined in the question. Usually questions using this tag will be about the differences and the impacts of those differences.

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How do I determine the locations and strength of earthquakes using a fictional tectonic plate arrangement?

I've got a world that I made using a combination of star system and plate tectonics simulations via a variety of programs. I've used this to build plenty of overlays for my world map—plate boundaries, ...
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1 vote
3 answers
109 views

I'm not a biologist or an engineer. How do I design legs for a large animal that leaps very long distances?

For designing fictional animals, I'm trying to design one with four appendages that is meant to jump large distances vertically and length-wise and is as large or larger than a human, with hands or ...
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2 votes
2 answers
57 views

I’m making this story that has a blown up planet, and I’m trying to have some animals and creatures that live here that have changed or been modified [closed]

So In this story the main planet has been blown up way before the point of the story taking place, and well I have most of the architecture down I’m stuck on coming up with creatures to inhabit it and ...
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3 votes
3 answers
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Would tall arboreal humanoids make good swimmers?

These are tall, sapient great apes that primarily live in trees, but come down for occasional food or things that catch their interest on the ground. By tall, I mean 6-7 feet on average, but because ...
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4 votes
5 answers
170 views

Could giants fit into a forest?

In my fantasy world, the forests are massive, reaching for miles and miles over the country, full of amazing creatures and just wonderful things. The thing is, I want my world to be relatively young, ...
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17 votes
4 answers
2k views

How do I determine when a planet is visible?

Recently, I was working on the various astronomies and astrologies of my fantasy world, when I had an interesting thought: “What if there was a planet that was so faint, people would be arguing if it ...
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5 votes
2 answers
128 views

What preparations are needed for putting a scientific explorer base on another planet?

In my book, a group of scientific explorers want to put a base on the planet so what would I need to make that possible? The planet is a super-Earth but has lower gravity than Earth. The ship they use ...
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3 votes
1 answer
122 views

Is my large tropical continent too dry or not dry enough?

I'm looking for a realism check on the climates of a Eurasia-like continent situated mostly in the tropics. I want to maximize tropical rainforests, savannahs, and hot semi-arid climates. Here is my ...
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3 votes
2 answers
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How would iron and alkaline-rich soil affect plant life?

In one of the solar systems I've created for my fictional universe, there is a small planet within the habitable zone between the size of Mercury and Venus. It's an incredibly rocky planet, with high ...
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4 votes
2 answers
67 views

Can an Earthlike planet orbiting a K-type star have longer days and extreme thunderstorms?

The planet orbits a K-type star. Basically same gravity as Earth's, with similar atmosphere. I'd like it to have a 30-hour day, plus in my characters' region, occasional very bad thunderstorms. Think ...
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7 votes
1 answer
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Microclimates of Peaks of Eternal Light on a Earth Like Planet

Peaks of Eternal Light are hypothetical mountain peaks that exist on the poles of worlds with little to no axial tilt. My question is simply, if such a peak did exist on an earth-like planet, one with ...
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9 votes
1 answer
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How far away from earth could atomic weapon detonations be detected?

Let us suppose that ten high kiloton to low megaton range fission/fusion weapons are being detonated between three and five kilometers under the surface of the sea on a planet much like earth, in a ...
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26 votes
9 answers
6k views

Why would my sect permanently change the color of my hair and irises?

I live in a pre-industrial world, very similar to earth, but with very limited access to magic (no flight, only healing very minor injuries, making flowers grow faster, lighting a candle, etc.). I ...
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4 votes
2 answers
238 views

Are my "ZW humans" plausible?

I'm worldbuilding a human inspired species where females are larger than males. According to the explanations I've read about why that would happen with birds of prey, dimorphism comes from: Avoiding ...
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5 votes
1 answer
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How fast would 2ft tall people process alcohol?

I have a world both of normal humans and a fantasy race that are basically 2ft tall, with large heads and torsos and stubby legs if that's important. They typically weigh about the same as a housecat. ...
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5 votes
1 answer
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What would Inversia's climate map look like?

Inversia is a world conjured up by Chris Wayan that expands on the old "inverted Earth" trope. The instructions he made were as followed in this link: Mark the sea level carefully. Remove ...
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1 vote
0 answers
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What would the climate of a Pangaea-Ultima-inspired world be like?

In a sci-fi scenario, human explorers have discovered a binary of G0 stars, each one 105% as wide, 110% as massive and 126% as bright as our sun. Orbiting this binary within its habitable zone is an ...
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4 votes
1 answer
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Seasonal Weather in a Forest with Polar Night

I'm investigating the feasibility of a world where there are taiga forests located far enough north to experience a significant polar night, say, no civil twilight for at least a few months. Inside ...
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1 vote
2 answers
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What is the maximum percentage of sky that could be covered by a super-Jovian world?

Puffy Jupiters can be huge but the Kepler data suggests that traditional super-Jovian worlds nearer the goldilocks zone, or farther from their parent star, only reach about 10% larger in diameter than ...
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3 votes
3 answers
85 views

Could the differences between day and night on this desert planet allow for strictly nocturnal condensation?

Here's the basic gist of this (debatably) habitable Earth-like desert planet: Size: Same as Earth Rotation: 30 hours (three extra hours of daylight followed by three extra hours of night) Revolution:...
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1 vote
2 answers
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What is the habitability of an Earth- like habitable planet that do not have any cloud covering?

Let's say I imagined a world that is as habitable as Earth and has the same oxygen levels, land to ocean ratio and similar average temperature. However it has no clouds at all. How different its ...
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2 votes
1 answer
109 views

How many co-orbital Earths can we fit and NOT get them tidally locked?

According to Sean Raymond, a co-orbit of six Earth-sized planets, separated by 60 degrees of space, will stay stable for millions of years. And in his latest blog, he has gone a bit further and ...
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1 vote
4 answers
150 views

What Could Create the Remaining Two Types of Single-Biome Planets?

There have been numerous questions in this SE about single-biome planets popularized in the Star Wars mythos. Despite the criticisms, these worlds are plausible, and they all involve the right ...
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4 votes
1 answer
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Convection Cells in the Atmosphere of a Jupiter-Sized Planet

Background The setting for a story I am creating is an earth-like planet near jovian surface area, existing in a universe where the force of gravity is appreciably weaker than in our own, such that a ...
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4 votes
2 answers
193 views

I need help with my ocean currents

I haven’t really ever gotten this far in worldbuilding, and I’m kinda stuck on ocean currents. My world has lots of tiny little islands that are on 2 slightly submerged continents (around 3 metres ...
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1 vote
4 answers
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How will seeded Earth life adjust to a tidally locked, Earth-sized moon?

Starting in 2017, a worldbuilder by the name of Dylan Bajda conceived a new twig in the speculative evolution branch of the science fiction tree: The seedworld. The twig was called Serina: A ...
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6 votes
2 answers
164 views

Consequences of a Super-Light Super-Earth?

In this scenario, there is a rocky planet that is 230% the width of our Earth, covering a total area of a billion square miles, 55% of which consists of three continents separated by a single ocean ...
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5 votes
2 answers
176 views

Picking skin/fur/scale/feather colors in the light of a white sun (F-star)

As I have been developing my world, namely a massive moon (0.9 Earth masses) oribiting a gas giant (about 3 Jupiter masses), I have confronted multiple times the question of what colors should the ...
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5 votes
3 answers
215 views

Additional applications for advanced airships in my earth-like world

Recently I have asked a question about assessing the viability of airships in the scenario of my world, concentrating mainly on their usage as cargo haulers. The answers have been pretty positive and ...
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3 votes
4 answers
158 views

Can an Earth-like world of shallow, global, seas be stable over geological time?

The following existing questions Shallow sea world - plausable geology? Would a shallow ocean planet be possible? both address shallow seas on Earthlike planets but don't touch on global oceans of ...
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1 vote
3 answers
194 views

how do you freeze an ocean to get a desert planet?

So I'm in the middle of writing my desert planet, let's call it Thermos for now, and I'm having a bit of trouble balancing some aspects which I'll get to later. Thermos is an earth like planet with an ...
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0 votes
1 answer
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What material could be found (Mining) on this planet? What could I do to have more important materials on this planet?

The planet is Earth-like with gravity: 1.05 Earth's, an Atmosphere of N2: 94% / H2O: 1% / CO2: 1% / Ar: 3% / 1% Other gases with 1 atm pressure at sea level, 40% of the land is H2O water, there is ...
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1 vote
1 answer
93 views

Can a planet bigger than earth exist with same density but with more water proportionally and a lighter core?

By bigger, only the area of the crust is necessarily bigger. Core is necessarily lighter. Everything else could vary. Can it hypothetically exist?
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4 votes
3 answers
136 views

Vegetation on medieval farmland abandoned for 40-80 years

What kind of vegetation may I expect to encounter on a farmland that was abandoned partially about 80 and completely some 40-50 years prior? This is medieval-style farmland, so it is not wheat for ...
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  • 2,201
3 votes
2 answers
109 views

How would a planet's (human) life adapt to inconsistent night duration?

I realise this question is rather broad, so I'll do my best to narrow down what I'm looking for as much as possible. The big idea The full daylight cycle on this hypothetical planet is consistent in ...
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4 votes
2 answers
121 views

Is it plausible to have a double-planet between a gas dwarf and an Earth-like planet? if so, can the Gas dwarf protect the planet from solar winds?

In my story, I plan to make a double-planet between a gas dwarf and an Earth-like planet, so is it plausible in a red dwarf or Ultra-cool red dwarf system? and if so, could the gas dwarf protect the ...
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5 votes
2 answers
709 views

Is a super-Earth with the same gravity as Earth possible?

I'm helping a friend construct a fictional planet for a project, and we've run across a problem. He's looking to create a planet nearly identical to Earth, except only larger. It would need to have ...
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3 votes
1 answer
159 views

Planet enabling societies evolving separately and suddenly comming into contact

I'm working on a planet design which makes it feasible for several human-like societies to emerge and evolve separately, up to a point where they are capable to interact with one another directly with ...
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4 votes
1 answer
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What would a Haumea-shaped Moon look like from Earth?

Basically what it says on the tin, I'm writing a fantasy world and I'm testing some exotic types of moons for this one. Then I came across Haumea, a dwarf planet located beyond Neptune. Quoting ...
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2 votes
1 answer
131 views

Cutting off a chunk from the north [closed]

I want to make a map of a completely made-up world; the main issue is the island of the elves. According to their history, a piece of land floated away from the north, and then the "water people&...
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1 vote
0 answers
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What would weather be like on a smaller Earth that has the same surface gravity?

First, let me state my current understanding of things (with the help of Universe Sandbox), just in case it is wrong somewhere and thus my question is wrong: To have the same surface gravity as Earth'...
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3 votes
2 answers
117 views

Fake, Heatless Sun-like object hovering over a person on Earth, how deadly it would be?

Above the Crimson King in my story is a sun-like paetheon-sized asteroid (5.8 km in diameter) that follows him and never sets. This is not an asteroid actually but i call it false sun and it appears ...
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7 votes
2 answers
148 views

Are there any rules of thumb to predict which waters should have frequent storms on a fantasy map?

In RL there are areas more likely to have storms which affect ship design (and in premodern era routes). Are there any rules of thumb to predict which waters would have frequent storms on a fantasy ...
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3 votes
0 answers
146 views

Help with my ocean currents

First off, I'm really not good with designing ocean currents (I find the topic confusing and hard). But for my world which is basically just earth over 100 million years in the future, I need to ...
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13 votes
7 answers
2k views

What is a proper River Horse?

In a pre-industrial human culture on Earth with slightly altered flora and fauna, where rivers and canals are the major ways of transport, how would an ideal and realistic animal replacement for ...
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  • 2,661
2 votes
0 answers
71 views

Does twice the planet radius mean two bands of desert per hemisphere?

Earth has three convection cells per hemisphere, resulting in each hemisphere having a band of desert at the end of the Hadley cells. Given a planet with the following characteristics: Twice the ...
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  • 4,338
1 vote
0 answers
78 views

How do storms scale with planet radius?

I'm trying to figure out how weather scales with planet size, keeping other factors constant. For a specific example, say a planet with the following characteristics: Twice the radius of Earth. ...
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  • 4,338
4 votes
5 answers
250 views

Secondary moon with negligible effect on planet

I'd like to know how to set up a secondary moon for a very much Earth-like planet that I could use for religious and time measurement purposes in a novel but that would not change general situation on ...
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  • 2,201
7 votes
3 answers
185 views

Natural door-furniture for wombat-poop architecture

Real life It is a biological fact that wombat faeces are approximately cube shaped. Wombat poop: Scientists reveal mystery behind cube-shaped droppings It is also the case that wombats tend to make ...
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0 votes
1 answer
466 views

What Would the Sky Look Like If the Sun Were a Different Color (And Still Half a Degree Wide)? [duplicate]

This question has been asked many, many, many times--what would the sky look like if the sun were a different color? But the mistake I keep seeing is that they used actual stars and imagined Earth as ...
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