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Is it possible to build a garbage recycler that turns residues into its constituent elements using plasma and accelerating it through a magnetic field? The technology level is around that of the t...
So, I've wound up in jail again (not my fault - I didn't start that fire, honest!) and I need to get out of here before the mayor has a chance to check his safe. Unfortunately, I left my lockpicks ...
Fraternizing with the neighbor species led to a bit of a mix-up, and an unfortunate reaction that ended with a face (and mouth) full of this alien substance. Consistency is like a thick mucous mi...
I'm working on a earth-like planet with a much lower sea level (like 3000m so the mid-ocean ridge would form many islands) but is that even possible? Will the emerged ridge make some weird stuff an...
Given the amazing computational power of Matrioshka Brains (M-brains), all the amazing things it can do, including but not limited to the following. Allotting space for an almost perfect simulati...
Edit: some answerers seem to be slightly misunderstanding the nature of the premise. Remember that the concept here is this; In the Precambrian of Earth, bacteria evolve to extract the abundant chl...
Following up on my last question about the ecology of my skyworld here, I decided to go more in-depth and fundamental. This is going to mostly be about the behavior of the ocean and changes to the ...
According to Elon Musk's plans/overall mission, humans could better survive as species if we inhabited more than one planet. So far so good, he proposes settling a million people in a first city a...
So if you haven't watched the film, basically there's this one character who suffers from a (fictional) condition referred to as "molecular disequilibrium." As described by the character, it's a co...
Consider the facts that a blackhole: Eats everything that passes through its event horizon. In layman's terms, it is defined as the shell of "points of no return", i.e., the boundary at which...
In a world I am building, I would like to have the moon change color when seen from the planet's surface as it goes through its phases (e.g., the crescent after new moon is blood red, a quarter moo...
Can a rocky planet have these qualities and exist: half of earth's gravity 4/5 earth radius a magnetic field capable of retaining an atmosphere a slightly slower rotation than earth can sustai...
I've recently decided to revive an old project of mine involving an alien planet. Unfortunately, however, I was not as good a worldbuilder then as I am now, and that's having some consequences. Ba...
Context On my world, there is a lot of water: sea, oceans, ... There are also firm land and islands, so it's interesting to travel on the water. The problem is that there is NO wind at all, and lo...
Say I have a moon orbiting a planet. Due to tidal locking, if we model the moon as a sphere, there exists an axis which passes through the center of the moon which is always pointed toward the cent...
So, the United Terran Federation and the Qulian Star empire have been in really bad terms lately. Wars, skirmishes, it pretty bad. So, the UTF and QSE have made an agreement. No ships piloted by ci...
A roughly earth-size planet orbits a cool G-class star, but barely within its circumstellar habitable zone ("Goldilocks zone") allowing liquid water. It has a shallow inclination and and lackluster...
I'm pretty much looking for an easy (or not) formula for calculating the mass and/or weight of fantasy creatures on an Earth-like planet with similar gravity. My world's dragons sometimes reach ove...
I have two planets that share an orbit around a pair of stars at a distance of 2.05 Earth-AU from the Barycenter of those two stars. (I can provide more details about the two stars, if needed) Usi...
I have a tidally locked planet on a circular orbit, with an axial tilt of 22.5° That means one side is always in the sun, the other one in the shade. The subsolar point moves along a north-south l...
An alien species has created a weapon. The alien stands on a planet, points the weapon at the ground, and pushes a button. A large amount of matter condenses itself into a mass, creating a huge hol...
Note: an edit has been made to the main question at the bottom A couple of years ago, I had a worldbuilding project which I have recently revived. I was relatively new to worldbuilding back the...
"Nightfall" by Isaac Asimov (you can hear the story here on escapepod, if you need it) postulates a planet in a multi-sun system. The orbital mechanics of the 6 suns result in all of the sides of t...
Due to the outcome of this question (Is there any way to Terraform Ceres?) I am now working on the concept of shell worlds. Docking would be done by large spires with adjoining rings where once th...
Say for instance we had a humanoid creature. how would they achieve flight by taking in a gas then expelling it at a greater pressure from a point on their body like the feet, back, or hands?
