answerstu

What would the size and rotation of a station need to be to produce 1g gravity from head to toe?

A structure with a radius of 224m rotating at 2 rotations per minute will generate 1g of force on the inside (spincalc). It will generate that force on the feet, but as you travel up the body the amount of force applied reduces. According to Wikipedia (citation needed) a larger radius and a slower rotation should be make the effect more consistent for a standing human. Playing around with the spincalc tells me that with a 1000 meter radius and a rotation of 0.95 rotations per minute is also at 1g, but I have no idea how that will affect the red...Read more

kim stanley robinson - In Aurora, why was the shipboard gravity increased to 1.1g?

In Kim Stanley Robinson's Aurora: During the return trip to Earth, (I assume) after all the passengers are hibernated, the ship increases its spin gravity from 0.8g to 1.1g. Then after the ship blows up, the Humans theorize that it is to make the transition to Earth easier. But earlier the Iris colonists had absolutely no issues with the local stronger gravity. Did I miss the ship ever mentioning (or even implying) a real reason?(book ending spoiler)...Read more

artificial gravity - 2001: A Space Odyssey book physics

There's a passage in 2001 that struck me as wrong. They're describing the spinning of the carrousel in Discovery and there's the following quote. The problem of shaving was also solved; there would be no weightless bristles drifting around to endanger electrical equipment and produce a health hazard.However, a centrifuge doesn't create gravity, it just affects items that are touching it or recently touched it. So wouldn't the bristles still be free floating? They have the relative velocity of the shaver, but not towards the ground like it woul...Read more

the expanse 2015 - What's the gravity maintained in Ceres?

I've just watched the first episode of The Expanse. I notice in a couple interior shots set in, I presume (by political content) Ceres, the producers/director took care to include a small bird, which flew very oddly.This bird would flip its wings, then fold them, then flip again -- much like certain songbirds do on Earth, except that on Earth they don't hover between flips; they fly a ballistic arc. This (along with mentions of "bone density juice" and the presence of "long-bones", extremely tall folk who'd grown up in low-gee) led me to conc...Read more

artificial gravity - Why did Alara have to go home?

In Home (Season 2, Episode 3 of The Orville) Alara is diagnosed with a bone/muscle mass deficiency that is attributed to her living on the Orville and away from her high gravity home world.The initial solution to this was to send home to Xelaya in order to recuperate. However towards the end of the episode: The crew of the Orville determine that they can make a high-gravity area in the Environmental Simulator.But leads me to my question: The Orville is an advanced space ship that obviously has Earth normal artificial gravity throughout its...Read more

rotation - Qualitative differences between gravity and a spinning habitat

I'm aware that living in a spinning habitat has a couple of noticeable differences from being on terra firma. For instance, running in the direction of the spin ought to make you feel heavier, while running opposite to the spin ought to make you feel lighter. I have also read that a smaller, rapidly-rotating habitat is much more likely to make you feel sick.But apart from these examples I struggle to imagine how day to day life would be noticeably different in a spinning habitat vs being on the ground.What are some examples of day to day activi...Read more

static energy artificial gravity

We did this expariment at home. It was a lot of fun.But it got me thinking.The water in this picture is atracted to the balloon because of static.so couldent a simular principle be used to creat artificial gravity with a large static generator on space ships?P.S. you should try this at home. it also works with a comb that you hav just ran through your hair....Read more

Why are there no spacecraft rotating for artificial gravity?

Spacecraft rotating to generate artificial gravity through "centrifugal force" are commonplace in science fiction but not in reality. Considering the problems in long missions (among others: bone loss, muscle loss, fluid redistribution, permanent visual impairment, feet disease, lowered immune defence, increased growth of dangerous microbes like ecoli, increased exposure of eyes and skin and lungs to freefloating microbes and dust), why isn't this method used?Also, wouldn't artificial gravity (radial acceleration) simplify the design and increa...Read more

How would a drone work in centrifugal force generated "gravity"?

How would a hovering aircraft such as a drone operate on a rotating spacecraft that creates artificial gravity using centrifugal force? For simplicity, assume it's a drone on a space colony, similar to the render from Blue Origin below. Shown on the bottom right is a drone spraying crops.I would think that taking off is nearly the same as in a gravity dominated environment. This question addresses jumping in a centrifugal environment. The reference frame of the drone before take off and immediately after take off is the same as the environment,...Read more

artificial gravity - Would a ball bounced in a centrifuge return to the floor?

In other words, does the centrifugal force inside a centrifuge only work to simulate gravity when an object is "attached" to the reference frame inside the centrifuge?1G at sea level is normally about 9.8 m/s^2, correct?However Centrifugal Force is different than Gravity.If you were to jump straight up in a centrifuge, would you move laterally when you landed? Would you land at all, or continue flying straight up until you hit the other side of the centrifuge?(Spoiler:)Another example, the broken window inside the giant centrifuge at the end of...Read more

artificial gravity - How much acceleration does it take for water to flow downhill?

Assume a hab in outer space with 1 atmosphere pressure and 23ºC (comfortable room temperature),To simulate gravity, the hab is spun. Acceleration is $\omega^2r$ where $\omega$ is angular velocity in radians/time and r is radius of hab. Obviously the lower the "gravity", the smaller the hab can be. High rpm's make people sick and less gravity reduces the need for high rpm's. Also the structure doesn't need to be as strong.I am wondering at what point gravity overcomes surface tension and water flows downhill. Thus the astronauts could enjoy show...Read more

artificial gravity - Can birds fly inside an O'Neill cylinder?

We know that birds can fly in a weightless environment from experiments with pigeons on the Vomit Comet. But on a very large O'Neill cylinder space station, could they fly the same way they do on Earth?Most birds fly by flapping their wings to climb and using gravity to dive, descend, and land. But inside a giant centrifuge, the "gravity" is supplied by the spinning of the cylinder itself. A bird in flight is not in contact with the cylinder anymore. While it seems plausible that a bird should be able to complete relatively short flights, becau...Read more