Posts tagged earth-like
So, here's my issue. My setting's central conceit is that a myriad of human societies developed at relatively concurrent times across a large system separated by only a few light-hours. (There are,...
While constructing a planet, with the same mass, volume and overall composition as Earth, how do I know how many tectonic plates should it have? And what does having more or fewer tectonic plates c...
From 56 to 34 million years ago, Earth was so warm that we have found evidence of jungle plants inside the Arctic Circle. Nowadays, jungles are confined in or near the equator, and those latitudes...
I'm working on a story about another dimension of this same Earth but without the same human development and history. The land and natural conditions would be the same except for the ones directly ...
This is the first question in my Arctic Airships series of questions. The second one is Arctic Airships, Part 2 - Navigation. The premise: An Earth-like planet plunged into an ice age roughly 2,0...
A ravine the size of the Mediterranean in area and ~15 miles (~ 24 km) deep on average opens up over the course of a few days in the Himalayas. A size comparison of the Mediterranean Sea to the U...
I'm envisioning a series of moons in orbit of a super-earth (ideal) or gas giant. If technically workable, the super-earth would have earthlike gravity, the mass and size aren't important. If it's ...
A planet orbiting an Red m-dwarf is tidally locked to its sun. Can it have a satellite which is not tidally locked to the sun? Also can the satellite be tidally locked to the planet ?
In this alternate scenario, Earth is the third planet in a binary star system. One star is a K-type main sequence star--or "orange dwarf"--that has 80% the mass of a G-type main sequence star--or ...
So in many a fantasy world mountains, or in some cases a particular mountain that play an important role in the story. Maybe it's the seat of the gods or hosts a hidden Shangri La, you get the i...
So, my climates are extreme due to a 31.1 degree axial tilt. The maps provided show a climate classification system based on prevailing winds and elevation. Based on Reddit user u/shagomir's Plane...
To clarify on the title, K-type main-sequence stars--shortened as "orange dwarves"--are subjects of excitement for astronomers and astrobiologists. Why? They emit enough radiation to provide a...
I'm trying to calculate the solar declination at the solstices, solar altitude at solar noon, and hour angles at sunrise and sunset to build a standing stone calendar at latitude 53.8 degrees South...
(I bolded the actual question, below, so if you want to skip the preamble scroll down to the bold lettering) I am working on a world that is very similar to earth in some ways, exactly the same m...
Imagine an alien species arrived on Earth, to find that the nitrogen in the air was toxic to them. Imagine they wanted to terraform our planet, and decided to fix this problem by nitrifying a lot o...
I am considering writing a fantasy novel. This novel would be set on an earth-like planet, but certain story details require that the planet have either a much larger or much closer moon than Earth...
First, specifying format in this question I will be giving temperature ranges that sometimes appear backwards. This is because I am listing average temperature ranges from southern to northern lat...
BACKGROUND The world I'm designing currently has a gas giant of the type known as a hot Jupiter orbiting close to the sun and causing solar flares. I would like the inhabitants of my Earth-like wo...
1 degree of latitude = 96.57 km. Equirectangular projections. (Yes, I need to revise the polar regions to make sure they don't get squished.) Obliquity of Jasmi: +31.1 degrees. Radius of Jasm...
I'll try to keep this question as concise as I can, but I'm not great with technical jargon, so a simplified answer would be greatly appreciated. Here's the set up: I have binary star system with...
How would the human eye have developed differently on a planet with two suns? One sun will be a yellow star functionally the same as Sol and the other will be a red dwarf. The planet will be ea...
Boats and balloons both work because of buoyancy - they are pushed up by a force equal to the weight of displaced water/air respectively. I want my (otherwise earthlike) planet to have 'seas' of a ...
Are there any such world elements that would seemingly randomly cause creatures to faint for extended periods of time, ranging from a few minutes up, but revert before they started suffering perman...
I've been playing with ways to make my world interesting, and also further justify the limited use of ferrous metals. One idea I had was that my world might undergo regular and intense geomagnetic ...
Considering a civilization that was here far before everything we know of, lets say around time of Gilgamesh. Warm climate, almost no winters, near the ocean with enough rivers, and people being ab...
In my world, similar to our earth, a person has the ability to create gravitational "spheres". He can: modify its location vary the force move the sphere (once created) select what or ...
I'm working on a story set in a planet of permanent dusk/dawn, and with a dark side that never sees the light of sun. I know that a planet tidally locked to its star would (roughly) look like this,...
Would it be possible for a fully modern civilization (i.e. quite like our own, perhaps slightly more advanced, with near-future tech) to arise on an Earth-like planet devoid of uranium, plutonium, ...
Suns are stars. They are orbited by planets, and sometimes other stars. Planets are orbited by moons. Reasonably advanced civilizations may launch artificial satellites into orbits around their pla...
I'm creating a planet inhabited by beings who have a body temperature that is colder than humans. What conditions on the planet would require them to have evolved this trait? Thanks
How could I calculate the habitable bounds, in relation to temperature, near the twilight zone of Gliese 667 Cc? Assuming an Earth-like atmosphere and no tidal working. Here are the numbers that ...
I'm trying to build a world that is almost completely water, but I couldn't come up with an explanation for WHY the world was like this. The world has the same gravity and atmosphere of Earth. It a...
First, I guess the conditions of the world are in order. It's approximately 85% the mass of earth and there is going to be a full ecosystem with all the usual types of bugs, insects, trees, and pre...
Many creatures - humans among them - have binocular vision, where two eyes side by side allow good depth perception. There are quite a few other advantages over one eye, including a larger field of...
Human evolution has a reasonably complete fossil record pointing to the fact that we and apes evolved from a common ancestor within the last 10 million years or so. But I want a world where it coul...
I'm making five habitable planets the size of earth as moons for a gas giant the size of Jupiter. Then I want to add many more smaller moons, Our Jupiter has 67 moons, I want as many small moons...
I was planning a short story that focuses on a rainy day in a city, and I realized that there's one interesting feature of it: Even though the weather seems bleak, and it affects the actions of tho...
I've been thinking about terraforming and planets in general. We can look at the planets we know that might be terraformable - Venus and Mars - and understand the technical requirements for doing ...
I wrote a story in which humans live on huge trees on a fictional habitable planet similar to earth. the tree would be even more huge than the hometree from avatar. The tree is not taller than th...
I know there are questions similar to this, but I'm not very scientific minded, and wanted to check with you guys how this would work exactly. I don't care what else I need to add into the equation...
In a world very similar to ours, rain has a high concentration of simple carbohydrates in it, enough to sustain life on the surface. After some rainfall, this sugary rainwater is left behind and so...
Before we begin, this system is created by aliens, and all orbits are on the same plane. These orbits are similar to earth's in shape. So, none of this has to occur naturally it just has to be stab...
I am considering setting my next D&D campaign on an earthlike but small planet. By "small," I am imagining a world that still feels vast, yet is circumnavigable over land and/or water with low ...
This concerns a habitable, earthlike moon orbiting a gas giant, which is not tidal locked, and has an elliptical orbit eccentric enough to avoid frequent deep winter freezes (the freezes do happen,...
According to Wikipedia, ...plants are green because chlorophyll reflects green light. And chlorophyll is found in all plants because it is the molecule that absorbs the light that is used to ma...
Based on the desert world from this question I need to transport around 500 cubic kilometres of water / year across a desert. Using this calculator. this can be achieved if the main feeder canal is...
This question has similarities to this one but concerns canal travel in more ancient times and is aimed at finding an approximate speed of flow not variables. Background Assume an Earth-like world...
In my desert canal world all water is supplied from the poles to the temperate zones via a canal network. I want to work out the amount of water that that is needed, so that I can work out the dime...
Imagine an earth-like planet on which gravity is reduced by 20%-30% every 15 months. The low-grav-effect should start slowly, reaching its peak/bottom of round about 0.7 g after 6 weeks and should ...
In a fictional setting, an Earth-like planet is orbiting another, Jupiter-like planet. For explanation see my previous question Which astronomical or cosmological event would explain periodical lo...
