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A neutron star is a type of compact star that can result from the gravitational collapse of a massive star after a supernova. Neutron stars are the densest and smallest stars known to exist in t...
That's the plot of lot of sci-fi stories, but on most of them the virus just affect all humans and get out of control. But lets say that my Umbrella corporation wants to target a specific human p...
How would faster-than-light travel appear through window of a space vessel? All the movies and TV shows like Star Trek and Star Wars seem unrealistic: Star Trek credits: passing stars get bigger...
For this scenario, we must look at the postercard of the term "superearth"--Kepler-10b. Its mass is almost 3.5 times greater than Earth, and its diameter 1.4 times wider. Now let's imagine that...
Imagine every organism is a matter-modifying and sorting mechanism within a very large chaos. Organisms believe their purpose is to evolve by reproduction and they're able to not wipe themselves ...
In some star clusters, the stars are packed as densely as a light year apart or less. Many clusters do not appear to have black holes in the center, though they remain relatively stable in their or...
I have a binary system. The primary star is F- or G-class; the secondary is K-class, 20AU away, and in a small reflection nebula (suggested here). A planet orbits the primary in the habitable zon...
How can the atmosphere rapidly change composition? Around ~2.3 Billion Years ago, the Atmosphere changed radically: Cyanobacteria started pumping out Oxygen and the atmosphere gradually became Oxy...
I'm planning to build a game for me and my friends where the worlds are procedurally generated. The idea is that different and habitable planets and moons have flora and fauna that has adapted to t...
I saw this old closed question on Physics.SE and thought it would be perfect for here. The original author is long gone, so I thought I'll just have to post it myself. We can consider factors of p...
We all know that lightsabers are used for cutting/melting through lots of types of materials (with few exceptions). Now what will happen if lightsaber is dropped into a lake and stays on? Wha...
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...
In these two questions, https://physics.stackexchange.com/questions/232141/how-much-force-would-be-required-to-destabilize-the-moons-orbit-enough-for-it-to and https://physics.stackexchange.com/que...
So say we discovered aliens through a wormhole near Saturn (Interstellar anyone?). Congratz to us! But we have a bigger issue in trying to communicate with them. They developed in a completely dif...
For my space-fantasy setting I created that I will refer to as Dragon-Folk here. The Dragon-Folk look more like humans with reptilian features than humanoind dragons. The Dragon-Folk like the othe...
We already have them. They are the future, and they are beautiful. Quantum Entangled Particles. One spins one way. The other, another way. Unobstructed they spin, in complete opposition to each oth...
I thought about making gigantic round space station that would spin when it moves that could form an artificial low level gravity. Steroids combined with mandatory weight training from young age co...
Using our world's physics, how could one explain the mechanics behind a witch on a broomstick? Not just the propelling part, but even the most basic fact - sitting on a broomstick - seems problemat...
Small debris thrown from a satellite down towards Earth will burn up in the atmosphere, but how much precision could it be done with. Would it be feasible with the correct launcher and precise timi...
I understand that the human brain consists of many cells working together but could a single celled life form evolve something like a brain with similar intelligence to the human brain? I was thin...
Let there be an Intelligent alien species of heavily armored but lightly armed folks. Think of sentient crabs without claws. The are physically incapable of fighting each other. They are filter fee...
What sort of time/date system would suit a Dyson Ring, also known as a Ring-World, an artificial habitat megastructure shaped like a circular band, located in the habitable zone encircling a star, ...
In a parallel universe, death is physically impossible so nothing can ever die but this universe has lots of life. It is also physically impossible for any life form in this hypothetical universe t...
Region 2 is north of Region 1. River and lake description: In region 2 there is a crater lake on what used to be a huge mountain. 2 large streams go from the crater lake and merge into a little r...
I'm creating a world my protagonist will visit with humanoid inhabitants that have a peculiar feature: their eye sockets are in the palms of their hands, not unlike the Pale Man Pan's Labyrinth. ...
