Posts tagged gravity
The planet has a radius of 128 kilometres and the surface gravity is the same as Earth's. My calculations have discovered that the planet would have a density of about 50 times the Earth's: $$g_P=g...
I'm building a world which is 50% covered by the sea. For approximately half the year, the sea covers one hemisphere; for the other half it moves to the other hemisphere, leaving the first a dry se...
EDIT: Yup, totally misguided here: http://www.physlink.com/Education/AskExperts/ae429.cfm Drifting away. So, no lunar catastrophe for me (without some other handwavium) I've read somewhere tha...
I'm working on a story that has several worlds but I focus only two of them now. World A is our present, world B is a fantasy-ish one which is very similar to ours but evolution has been different ...
Assume Earth of today was altered overnight. Some percentage of the more common elements of Earth's bulk (silicon, iron, and so on) are replaced with something much heavier. This changes the ov...
Can a Dyson Sphere and a star inside of the Dyson Sphere, both have a "stable" orbit around the barycentre of a system where they are not the most massive objects? And/Or Can they both orbit togeth...
A while back I saw this video talking about the habitability of double planets and Rocheworlds. I haven't seen any questions about the latter case here, so I decided to take a swing at it. For so...
Soft sci-fi uses inertial dampeners. Harder sci-fi uses stuff like advanced crash couches, robotic exoskeletons, or (my personal favorite) drug cocktails filled with stimulants and other medication...
Superheroes! Everybody loves them! (Though maybe not as much as magic.) The point is, I have a world with super heroes in it. I have a pretty good system of power granting, and have basically divid...
I'd like to use the theoretical graviton particle to give some characters telekinetic abilities. My research so far is this: "¢ Gravitons are a theoretical particle in string theory that causes th...
I was thinking of making flying islands part of a planet ring, but the problem was that they wouldn't be able to host life unless they were inside the atmosphere of the planet, but at that point it...
So, I was looking at the temperature variations in Earth's atmosphere and noticed that it gets extremely cold in some of the upper portions. So I was wondering, could a low gravity world hold onto ...
The "Light-Year City" Questions "” What would be the gravitational implications of a city in the far, far distant future, with an area spanning one square light year (3.456 × 10^25 mi² area)? Th...
YA fantasy novel set 350 years in the future under a corporate dictatorship which reanimates dead people to use as disposable slave soldiers. So the setup is a medical/research station orbiting a ...
I am writing a sci-fi novel in which humanity has colonized a majority of the solar system, and a few minor colonies on nearby stars. Although calculating mass and gravity on individual planets and...
I have a planet which was created by a God, who is experimenting with it by making it spin at an incredible speed. At the equator, the gravity is reduced to half by the centrifugal force generated ...
I'm working on a sci-fi game about conquering little asteroids (about 1 km diameter). You can go into one of them and make it Earth-like so other humans, animals or plants can live there. To do th...
I am constructing a two dimensional world, but ran into a problem with one of the fundamental forces, gravity. I first tried to see what would happen if I just used the normal law of gravity, $\fr...
I want to use a handwavium gravity field generator on my spaceships, but this has several problems. Generating gravitational fields of peculiar shapes is not a difficult thing to do in this settin...
I was wondering about feasibility of small 'shell' world build around something very dense, like black hole or some 'artificial mini star' that could also be source of energy, and of course gave us...
I'm working with the idea of a 'ring station' encircling a planet, as a tightly connected belt of structures that connect in orbit around the planet's equator. I'm curious to know what would happen...
When the mass (wood, hardened sand, iced water, stone or whatever but is not so fluid) fills all of space (especially in a volume of infinite size) in almost uniform density, could the mass sustain...
I am hoping to create a planet with a greater rotational speed, making it oblong, thus causing differential gravitaion from the equator to the poles. I am hoping for the gravitarion to be lighter t...
I'm looking for answers that focus on changes in internal anatomy that allow humans to survive in a high-g environment. If dramatic visible change can be avoided, that'd be great. Problems Circula...
What would be the effects of high or low gravity on human body development? How would the human body develop under a different gravity? Many science fiction stories explore the idea that people fro...
I was thinking of ways to make the human body stronger, so I was wondering why not lift weights with a higher level of gravity, hence my question. I'd like to know if there's some clothes, jewelry...
Working on a bit of a story that includes the ejection of the planet Jupiter from the solar system rather suddenly with all of the planets staying generally within it. I understand this is complica...
I'm creating a fantasy planet with an interior that has a god phasing in and out of our dimension, adding to and taking away mass in mysterious fashion while keeping everything but the influence of...
I'm building a fantasy world with a planetary core that gains and loses mass in a predictable manner. I want the gravity to increase and decrease by 50% in both directions over a period lasting 2-3...
If the earth gravity fluctuated between +50% and -50% over the course of 200 years, what specific adaptations would be useful to account for the change?
OK, let's suppose I have a structurally sound ship"”it could take a shaking"”and that space debris isn't a problem. I have access to a high level fusion reactor, which can, for all intents and purp...
I've been wondering, would it be possible to achieve levitation of an object in the center of mass of a planet? I ask this because the gravity is the attraction between bodies and theoretically th...
I am writing a story in which a planet has a moon that orbits it about once a minute. In the story, the moon is pretty bright too, so the night sky has a little bit of a slow strobe light effect: 3...
In the near future mankind could well permanently settle on the Moon. Whether for research or mining or just good old fashioned novelty is irrelevant. The colony includes: Large domed structu...
If the Earth had Saturn-like rings going around the equator would there still be a need for a moon? Would the rings be able to take care of the tides because of their gravity? Would the moon become...
Good afternoon! I'm working on a fantasy series set on a very small planet, roughly the size of Pluto or the Moon. I've already read some topics on the small earth-like planets, but mine's a bit un...
My current story is set inside a hollowed out dwarf planet (i.e. Ceres) with an artificial gravity generating "mesh" within the shell. This Gravity Mesh can generate a gravitational field that can...
There is an interstellar civilization somewhere between K2 and K3 and they have managed to build a dozen Nicoll-Dyson beams. These are megastructures which collect the entire power of a star, and p...
I am writing a story where the main setting is a hollowed out asteroid with an interior biosphere and an exterior city. In this case, using centripetal force to simulate gravity would not work, be...
I'm curious what the gravity would be like on an infinite area flat world. The plane of the world would have some finite depth but be infinite in all cardinal directions. This is, in effect, a Mine...
Some time ago, I imagined a world with one peculiar disease. People affected by it suddenly "fall" towards the sky, never to be seen again. What could be the scientific cause of such a disease? So...
Supposing you took Earth or a planet like it and doubled its mass, the gravity would obviously increase in whatever proportion to that. As a result, humans as we know them would be ... thicker, (...
So in the story I'm trying to write, I'm having trouble getting the gravity on my fictional to seem realistic, and I would like to know if it seems technically possible? A group of astronauts tra...
Based on the Newton's law of gravity $$g= \frac{GM}{r^2}$$ we calculate the gravity acceleration, gravity exerted, etc. And now, provided there exist the correct gasses to create a humanly surv...
Logically a born and raised on a planet with Earth-like gravity would move slower on a high gravity planet, and would be both faster, and possibly clumsier in low gravity. In my world humanity has ...
All right, so I have a game that I already made, the concept is that there are "planets" that do not move and ships that can stand still without being sucked in to the gravity of the planets. I ne...
If the force of gravity at the Earth's surface suddenly became 2 times stronger, how would the environment and humans cope? I'm guessing a lot of flying creatures would suffer, but what would happe...
I want to partially terraform Venus, enough to make it feasible to mine minerals etc,. there. To do this I need to do a few things but for this question I'm focusing on stripping away at least some...
In popular science fiction, we see habitable Earth-like planets with visible, Saturn-like rings. In reality, such rings exist only on gas giants, a category where we can find Saturn. Is it really...
