Posts tagged gravity
Say we took an adult racing horse from Earth to a planet identical to Earth, but with half its gravity. Exactly how fast would it be able to run? Would the low gravity have any significant effect o...
A bridge is collapsing, and our poor MC is stuck in the middle. The ground beneath them collapses, but they miraculously are able to climb up the falling debris and safely make it to the main land ...
I have a planet approximately 3.5 times the mass of the Earth. I have a moon orbiting that planet that has to be habitable as well, because my story will take place on the first expedition to this ...
Some Details Suppose an Earth-like world with the following changes: Atmosphere: 67% nitrogen, 31% oxygen, 2% other Average surface temperature: 16.7° C (62° F) Day/night cycle: 20 hours Gravi...
A few years from now, say 2025 or thereabouts, a technologically advanced alien civilization discovers our solar system. They study us for over a year, using small drones that launch from a vessel ...
Going off of this question, What would happen to the Earth if Gravity disappeared?, if an area of 1,000,000 cubic miles (as in, at the epicenter the area of effect will reach into the earth 50 mile...
Some of our ancestors were more robust than modern humans. Could they adapt to a 2-g world better than we might? Maybe even 3-g? Over time their bodies could evolve, i.e. only the most robust wou...
By extremely high gravity, I specifically mean around 28 Gs. I recently asked this question with regards to inhabiting the sun, and surviving in the sun's gravity seems like one of the major challe...
So, I read the question, the associated answers and comments located here, as well as some others that were more divergent than what I was hoping for. Basically, imagine two earth-like planets ve...
The other day I was watching my 8 year old grand-daughter run on the playground. She was running like a girl - like Jackie Joiner-Kersey to be precise. It appeared that her form was perfect - that...
I am writting a novel ( in a world where magic exists, and is evolving every second ) A lucky guy, found the notes of an ancient artificer on a training artifact. The artifact was very easy to mak...
Imagine a pair of black holes in orbit around each other. I'm wondering how this would distort their mutual event horizons. In fact would it be possible to "break" the event horizons by reducing th...
This is a follow up to What would physics be like in a wrap-around universe? PyRulez commented, "Will gravity still make sense? (Namely, will it converge or not)?" This was bantered about in the c...
Based on my recent series of questions: here and here. The giant known as Jupiter has moved to the inner Solar System and Earth and Mars have become it's moons (despite all the odds). The moon of ...
I'm not talking only about the kind of waves one sees at a sea shore, but also smaller waves like ripples and chops, and bigger waves like tsunamis. Assume a similar tidal force to that of Luna.
If a child grew up since being a toddler (2 to 3 years old) in an environment where the gravity levels fluctuated so they were sometimes stronger than earth gravity and sometimes weaker, how would ...
Let us assume we have a Kerr metric (rotating) black hole of 10 Sol-masses, spinning at 300 revs/s (as measured by a rest frame observer). What yield strength (assume that yield strength is limiti...
Suppose you were an astronaut on a space ship in the near future. Or an on an asteroid mission where little to no gravity is available. In such a situation it would be difficult to justify taking a...
I've got a cave civilisation who have never seen the Sun, and don't have much of a concept of time. I was inspired by a Reddit post from someone with a similar situation, and like me, the OP was wo...
So in (a lot of) sci-fi we have magic gravity that gives up and down and layer-cake decks, and nice and easy set design for the TV studios. I'm actually pretty much okay with this, but what rubs me...
If there were some way (sub question: IS there some way?) to get neutron star material out of the gravity well of a neutron star, -say maybe a high-speed collision of two such stars- how would that...
Many authors describe worlds with higher gravity than our own, from whence super-muscular aliens originate. However, as we increased the size, mass and surface gravity of a world; there would be p...
The film Upside Down showed a fiction movie where 2 planets of gravities exists within a fairly short distance. One may also assume that all parts of one planet is parallel to the other, which mean...
If Mars is thought to have once been like Earth several billion years ago, with an atmosphere, magnetic field, oceans, etc., then what would the planets true surface gravitational acceleration "m/s...
Several science fiction books picture bigger Terran planets with higher gravity. I'm curious to know what would be the maximum gravity mammals similar to the one on earth could survive. Only bones ...
If two planetary bodies were tidally locked to each other (e.g. pluto and charon) then could there ever be a situation where the smaller of the two bodies had the 'heavier' gravity? Could you ever ...
In the mobile game "The Path To Luma", the main hero travels to very tiny planets. Let's not think about where is the sun and how we leap through such small planets. What I want to ask is, if there...
The way the Earth travels is dependent on the gravitational influence of matter that surrounds it. This question is of how/if we can prevent or reduce certain objects effects on Earths movements th...
In the movie Interstellar, they go to a planet where time flows by much slower for them while on it because of the increased gravity that planet is experiencing due to the nearby black hole. My que...
In one world I've developed, the local surface gravity is slightly more than three times the surface gravity on Earth. Humans settled this world and were doing quite well through highly advanced te...
Imagine there is a space station shaped like a cylinder. The cylinder spins on its axis, in order to create artificial gravity through centripetal force. My question: How fast would the space sta...
I want to create a planet that has a frequency of two rotations per second, thus making a "Planet without Night". The planet will be like a flattened disc, due to inertia causing the planet to be a...
Let's say that, in a universe modelled after Patema Inverted, there are two "flavors" of matter: one which is attracted by gravity (so when dropped on Earth it would fall down), and one which is in...
I have a super luxury space hotel. It has artificial gravity in the living and shopping area and 0g in some parts of the recreational area. There is a 0g pool available for the guests. I want it ...
I have a series of astronauts landing on an asteroid. I'd like to know the threshold of mass for them to not fly off into space. Specifications: Assumption is all astronauts are under 180cm, 80...
How do you cut through an unbreakable armor? With an all-powerful sword, of course. No really, if we had seemingly unbreakable matter (lets give it the original name of Unobtadamentium, or Uium for...
Context NASA commissioned some awesome, vintage-style prints a while back advertising the colonization of Mars. Three of them stood out to me because they depicted colonization of the moons of ...
Would a blind astronaut be able to sense the gravity of a nearby star/planet/moon? Would an astronaut lost somewhere inside the Sun be able to sense which way is the core and which way is the surf...
I want to build a planet (or satellite) that: is smaller than Earth, has a thicker atmosphere than Earth but breathable, has neither intense volcanism, nor any extreme condition of that sort that...
Let's assume that sometime in the far future, ice-mining on Europa has become a very profitable business venture due to dwindling fresh water on Earth and the growing demand for more water from the...
I have a metallic alloy called "Attrahite" in my world that conducts gravity the way that copper conducts electricity. Currently in the world, passing an electric charge through Attrahite "activate...
I am currently orbiting Jupiter, the rent is pretty cheap and the view is magnificent. However, my former electricity provider refuses to connect me to earth's grid for petty reasons like "are you...
In the story I'm writing, an ancient civilization once roamed the local group, traveling from galaxy to galaxy with ease. Thousands of millennia after their disappearance, humanity stumbles across ...
I have a mars-sized "planet" orbiting a superearth-sized mother-planet. There is also another satellite with an abnormal elliptic orbit, but it is of minor concern for now. This is the resume of ...
Gravity is the weakest of the fundamental forces of universe but along with electromagnetism tends to dominate most of the macro world phenomenon. But what would happen if the force of gravitatio...
Say the moon is drifting further away from Earth at an astonishing rate of 3.14159km each year due to the crazy tides, the rising sea level and shielding us from stray asteroids. Given 150 years ti...
If the gravity on earth was different, how would our bodies change? For this question, assume that gravity was five time stronger (5G) from the beginning of the Earth. Would a human-like body stil...
This is the next piece in my question-series, you guys have been absolutely awesome in your answers to the first question: How to solve the old 'gun on a spaceship' problem? In this series, I try ...
Would it be easier to build Skyscrapers on a planet with 50% of Earth's gravity, and the same atmospheric pressure of the Earth. I noticed someone asked why the planet has lower gravity, this is be...
Says a F22 with full tank is trying to break through the thin layer of Martian atmosphere and almost moon like gravity(alright that's probably too exaggerated) anyway say there is a runway stretchi...
