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I'm looking to build a "twilight" world, where days are like twilight even when the sky is clear and nights are...very dark. Cloud cover might be able to turn day to an early night. I do envision a...
This is inspired by GRRM's A Song of Ice and Fire, where for millennia House Targaryen wed brother to sister at all possible opportunities, and Aunt to nephew, Uncle to niece, and cousin to cousin ...
The Setup: We have a highly advanced orbital station. It is designed to be rather stealthy, like a observation post. Is it possible to make it completely invisible to the naked eye, even when in ...
The hybrids were created when unseen aliens sent SETI a message explaining how to combine human and alien DNA. (Ignoring the scientific illiteracy and contradictions in the films) Under the constra...
Every day the Sun is closer to be a Red giant, making the live of the initial home of the humanity practically uninhabitable. Humans are not there anymore. It's a protected territory, but the Sun g...
I have read about protagonists who get smashed through buildings, going through earth's atmosphere from space onto earth's surface unharmed , get launched across the sky and smashed into concrete. ...
In my universe there are more than just one FTL method: Wormholes, Warp, Hyperspace and more. The thing is I need to predict the destination of an enemy fleet. I only can think about spies and h...
The year is 2109 C.E my friends and I were caught in a space disaster when the spacecraft we're in broke apart during a daring escape from a patrolling spacecraft. We stole an antique cellphone (fr...
Set in the year 2216 C.E. Imagine a spacecraft with a crew of twenty is leaving for Enceladus, moon of Saturn which is estimated 1.272 billions km away in a matter of months using the next generat...
From 5.96 to 5.33 million years ago, disaster struck the Mediterranean Sea. A tectonic snag turned this... ...into something like this. In this alternate scenario, the sea separating modern ...
Building things in space is a massive benefit as the weightlessness and lack of stress means the only restraint is the amount of resources available for construction. But therein lies the problem, ...
Self-explanatory. I have a planet-eating entity moving slowly across the solar system towards Earth and I wanna know how long it would take for us to notice its presence once it starts consuming Pl...
I have heard of gravitational slingshots being used to theoretically accelerate a spacecraft using a planet's gravity and momentum in orbit. But how about decelerating a ship? If it is at all possi...
Let's say that in my fictitious, scientifically advanced world, humans create some "miniature" (and I say miniature because I'm not sure what prefix use: Nano? Micro? Or even smaller?) machines to ...
The obvious hitch with a superdense atmosphere is that, even without being super deep as well, it absorbs light. Just as the bottom of the ocean is dark even just miles deep, an atmosphere as dense...
My idea is to have a place that is "inescapable" by any conventional propulsion system, except it has Earth-like conditions: a breathable atmosphere, 1.0g gravity, etc. What would have to be the c...
In the Mass Effect Series, the Quarians have a population of 17 million individuals and they get all their food from 3 massive "liveships." I'll round this down to 5 million individuals supported b...
The concept of "age" on Earth is based on the number of revolutions the planet has completed since one's birth. In a setting where interstellar colonies exists, of even in a setting where multiple ...
Many other questions, as well as a few online sources, all agree that in order for me to have multiple sapient species in my world, they need to be either separated by a natural landscape or not a ...
Would it be possible for a terrestrial planet say atleast >0.3 Earth masses orbiting in the L3/L4/L5 and L1/L2 Lagrangian points of a Jupiter sized planet in the habitable zone of a Sun-like sta...
I have a binary system in which my world orbits one of the stars, not the pair, in the habitable zone. The stars are relatively close together (because I want the secondary one to shed significant...
So I'm thinking about having my race of lightning wielding rabbits wear metal armour. The first one that came to mind was gold. And then a quick Google search later told me gold is one of the best ...
You are a planetary engineer from a lonely species fairly high on the Kardashev scale. Although your species has wandered throughout the galaxy seeking out new life and civilizations for thousands...
As the title says, what if a neutron star stops spinning what will happen to the materials that the neutron star is made of? Will they still be super dense? Are they brittle? If they are, how st...
The average temperature on this world surface is −55 degrees Celsius. 80% of the surface of this world is covered by liquid ammonia oceans. This planet has a surface gravity of 0.75"‰g. The atmo...
