What If We Built an O'Neill Cylinder?

[@WhatIfScienceShow]

Watch our What If Discussed episode with Dr.Ronke Olabisi: bit.ly/discussed-life-in-space

[@chickenboiyt7449]

I love youuuuuuuu!!!!!!!

[@emortraoniv]

♥

[@Vari2682]

H

[@InfinityGaming420]

C

[@Vari2682]

Potato

[@steamlink4803]

„6 years to build“. If street workers can‘t finish repairing a street in that time, I‘m a bit sceptical.

[@nuterra9143]

3D printing and Robots.

[@VeritasVortex]

What place are you living in if they can't build a street within 5 years?

[@VeritasVortex]

@@Vii905 they must be corrupt as hell then

[@seanmcclure9852]

Man I was about to say something similar lol.

[@kj6053]

@@VeritasVortex I live in the US and it’s like this.

[@edriasandika]

And inside of those O'Neill Cylinders, there are secret Mobile Suits being developed....

[@badkittynomilktonight3334]

Hail Zeon!

[@ai97Nord]

Sieg Zeon

[@pakzgames1421]

Sieg Zeon!

[@TAREEBITHETERRIBLE]

GUNDAMU!?

[@ZukoShifu]

Man i love gundam

[@pheonix_soldier]

What a nice cylinder colony. It would be a shame of someone *dropped* it

[@anhilliator1]

Found the Zeonic user.

[@tomdelvetto9906]

Laughs in zeon

[@ventusfox]

Sieg Zeon

[@JFrazer4303]

A silly cartoon idea. There are plenty of rocks to drop.

[@anhilliator1]

@@JFrazer4303 Char, is that you?

[@gravytrain8041]

You'd need shielding for debris too. The faster it spun, the more destructive random dust would cause. A random piece of gravel, would be like a round from an A-10. If it's spinning at half a G. Small hurdle though, compared to building the structure. I think habitats are our future. Not terraforming irradiated rocks.

[@Lustie]

I think both options will be explored. Terraforming if we can manipulate is the best option, and while a planet is going through the process of terraforming, we would be floating in a cylinder structure.

[@JFrazer4303]

There's plenty of rock in space, and we can make concrete. A non-spinning shell could be any shape and size and still direct Sunlight inside to the habitat.

[@uncharted7againblackking256]

Your a genius

[@JFrazer4303]

@@Lustie What is terraforming for? So that if it works, in a few thousand years, a few more dirt farmers can till the soil? So that a few more people can walk naked under a sky? A fully terraformed Mars, Venus, the Moon, Titan, Europa etc would yield barely x2 increase in the land surface available for people compared to what we have today. In inferior conditions, and in low gravity which is a complete unknown. It is not responsible to go on as if planning to live down on Mars, until it's proven that we can live long-term and stay healthy in low G. *Proof*, not S.F, not wishes and hopes and try it and see, not maybe in the future biomechanically engineering ourselves and dour offspring. We know from the '70s NASA Ames/Stanford space settlement studies that there are no new inventions needed to mine moons and asteroids and to build for virtually Earth-like conditions in space. Anywhere there is or to which we bring materials. In just the inner Solar system small bodies, there are materials to build O'Neill habitats for hundreds of times the presently available land area. In better conditions than down on another body or even better than much of the Earth. In the main Belt, thousands, and the "habitable zone" around the Sun goes out into the Oort cloud. NASA in the '70s showed their plan to Congress: cost would be like any other large infrastructure or industrial development down here, and by '08 or so we'd have had the first small O'Neill habitat for ~10k workers, and all the ground and in-space infrastructure to reproduce it.

[@Jakkaribik1]

​@@JFrazer4303 We could terraform smaller things on world so it would take less time while people are in better parts of Space Habitats or even Earth like planets when we have enough space bigger terraforming actions could happen what would take thousands of years if the tech was way way better than now .. We are now at the beginning of Tech sure humanity is great but now it's developing faster than ever biggest thing is the lifespan of peopleand being able to learn while you sleep imagine you dont use some parts of the brain in the day and can train it at night because it was scanned how much you did use it on the day..

[@Chandannnn4]

What if the O’neill cylinder crashed back to earth? 3020: not a bad idea

[@colongie]

Nah Thts gotta be 3030

[@arsh0189]

Wish i could see that year 😒😔

[@kyndalcrossing4482]

Nah it’s gonna be 2020

[@EsperRanger]

As in Gundam?

[@iiliyanafaz2936]

John Szalay,Colony Drop right?

[@maestrulgamer9695]

In 1974 a physicist came with the idea of making habitable space station and was considered crazy. In 2016 a bunch of middle schoolers came with similar idea and that was considered logic. This world is weird.

[@Jakkaribik1]

Some are always considered crazy probably because the big players didn't want such great ideas out there YET

[@Devilot109]

What Middle Schoolers?

[@benpatterson4452]

I'm Commander Shepard, and this is my favorite Channel on The Citadel.

[@blackdragon6]

Definitely giving off strong citadel vibes,

[@mr1888]

lets bang😉

[@blackdragon6]

@Rafey Asim wrong Shepard

[@keirfarnum6811]

Ben Patterson I didn’t know Jack O’Neil had his own space station?!

[@Juice-chan]

@@keirfarnum6811 miss that dude.

[@rafaelperalta1676]

I wanna be a Newtype living in a colony with my own Unicorn gundam.

[@scruffles3838]

I dunno man, colonies don't have the best safety history in gundam

[@arishemghoul9571]

@@scruffles3838 lol fact

[@arx3516]

You'll be lucky if you get a semi-functional Zaku1!

[@AJsoment95x]

Just make sure not to see a runaway girl named Audrey otherwise you'll go crazy over her against all odds.

[@ZukoShifu]

@@scruffles3838 island iffish be like

[@tgl_toxic9593]

Only if the all countries worked together this would have been a thing a while ago but no all we do fight

[@queenelizabeth2694]

@throathammer1 What do you mean "The Bilderberg is the best way to start looking"?

[@antijapanunion3462]

we need peace

[@Supanikaa89]

TGL_ Toxic exactlyyyyyyy were so dumb

[@Telonelemon3]

The US invited the cars you drive, anx the electricity you use to power the computer or phone they invented that you typed that stupid comment on. Stop blaming your masters for all your problems.

[@jasonmarcus1683]

@throathammer1 Only the elites? Are you aware of how many people could fit on one of those? Unless what you consider as an elite is more broad.

[@corporategunner5972]

The best part of the O'Neill Cylinder would be the journey down to Earth. *This post is sponsored by the Principality of Zeon.*

[@JohnJohn-yl4ko]

Lmao

[@maxmega42]

Sieg Zeon

[@hygog]

unless you live in Australia

[@HennyESP]

The Zabis did nothing wrong.

[@pheonix_soldier]

@@HennyESP um... genoicide? Created a space laser? Genocide again? Used weapons of mass destruction in violation of the accords? Patricide. Gee the Zabis sure loved genocide and last but not least the murder of Zeon Zum Dicum

[@coluurs5660]

1970: this is a terrible idea, why would anyone wanna live there? 2020: yknow this doesn’t seem all that bad

[@preetymoonangel]

Thats True😂

[@johnwang9914]

Actually, 1970's was when the book that O'Neill wrote about it came out and it was considered a good idea though students at Stanford designed the smaller and more feasible Stanford Torus which NASA said could be built in twenty years if their funding remained at Apollo era levels. Unfortunately, their funding did not remain at those levels. With both the O'Neill Cylinder and Stanford Torus, the first step is to mine resources in space, rocks for shielding, iron, aluminum, dry ice, and water ammonia ice for the pressure habitat. Both Stanford and O'Neill proposed a mining base on the Moon but an asteroid trapped in CIS lunar space would do as well if we ever figure out how to mine without traction. The construction could be quite simple and automated, metals could be drawn out as wires, spun as cables and knitted into structures with a large loom, the spaces between the cables could be thermite welded or filled with plastics or glass or even soldered with metal. The dry ice and water gives us hydrocarbons hence plastics, oxygen and hydrogen, the ammonia which often comes with water in space gives us nitrogen and hydrogen. The regolith/rocks can be packed in sandbags or mixed with a binder like plastic or cement to form the non-rotating radiation and meteorite shield. The rotating pressure vessel can be separated from in the static shielding material by Halbach arrays of permanent magnets and aluminum rails or rather coils in an Inductrak magnetic levitation, that does mean the rotating pressure vessel would need occasional boosts to it's rotation either through thrusters, gyros or momentum control wheels and thrusters (at some point the thrusters would still be needed to despin the gyros or momentum control wheels as they can't be spun to infinite speeds but the gyros and momentum control wheels means that propellent doesn't have to be used all the time). The energy for the levitation comes from the kinetic energy in the rotation of the pressure vessel hence the need to add more energy to the spin. Transportation between the spinning portion and non-spinning portion would be done with PRT capsules that again uses Inductrak magneric levitation and linear motors and dock with the various habitable spaces whether with artificial spin gravity or the unspun microgravity areas. Note, the original calculations used half atmospheric pressure for the atmosphere with higher oxygen levels for the same vapour pressure. The idea was to reduce the structural strength needed for the pressure vessel.

[@farisabuain6832]

Why is it a terrible idea?

[@maxwellsequation4887]

It is a bad idea It's not even an idea

[@johnwang9914]

@@maxwellsequation4887 You simply have no imagination or a very limited mind. Such space habitats would have earth gravity from their spin, radiation and micrometeorites shielding, access to unlimited solar power, access to the resources of the asteroid belt and the moon, no planetary gravity well so no need for massive boosters just to leave and there's enough resources in the asteroid belt for trillions of people to live in first world comfort, any disaster to one habitats is only to one habitats leaving all the others unaffected, if any group of people dislikes their neighbouring habitat, they could just move their habitat away, these habitats with nuclear power could become generation ships to travel to nearby stars ensuring the survival of humanity for billions of years, the habitats could serve as nature preserves. In what way are you saying O'Neill Cylinders are a bad idea other than your ignorance and bias towards living on the surface of planets.

[@Shaqdog]

Sydney is nervously waving at you. 😂

[@anhilliator1]

SpaceForTheSpacenoidsCharDidNothingWrongSIEGZEON

[@alvinandzin1982]

Reminds me, Space Colony from Gundam Series.

[@soongwanjun9381]

Yeah that's came 1st in my mind

[@chrysllerryu4171]

You know that space colonies in gundam are called o neil space colonies right?

[@delitaheiral2093]

I click this because of that ;)

[@fakhrizzaarrifi9375]

Yes.. it based on O'Neill cylinder

[@zypoquiz1444]

Then plunge it in australia.

[@shashidhara.g.m655]

Him: *moving to space station doesn't sound crazy anymore huh?* Space x astronauts : *NOPE*

[@danielwhyatt3278]

Definitely seems like something w4 should be looking into building in the near future now. More so because a structure like this would be much more self sufficient.

[@shainsahagun735]

Just like in the Universal Century timeline in Gundam... lmao

[@keithharper32]

With the Amazon Empire instead of Zeon

[@DerekWorth02]

No Zabi’s!

[@iiliyanafaz2936]

😂😂

[@AtagoJRPG]

I was about to say the same thing

[@zetrtyui_azmin6561]

@@AtagoJRPG same to me

[@adlacz7691]

This is so Gundam Universal-Century. Then when the cylinders struggle for independence, they'd crash those thing on Earth capitals.

[@desmondanimus1454]

After gasing the interior with G3 gas

[@adamoshea2793]

Building o Neil cylinders are more practical and more efficient than terraforming mars and other planets. Also you could control the weather and temperature . Unlike planets.

[@dtvjho]

Cylinders are also mobile. They can be moved, also unlike planets.

[@adamoshea2793]

@@dtvjho yep can be moved out of the way of incoming asteroids.

[@ghbjnjghuhh4661]

I love to go to another planet

[@steelymanfan7276]

@@adamoshea2793 The only problem with building it at the moment is the cost, it would cost trillions of dollars.

[@JFrazer4303]

@@steelymanfan7276 by the time we could build space habitats, returning metals from NEAs would end "economics" as we know it. It is not fantasy to end scarcity of resources and energy. BTW, we've spent~$17 trillion on military since 2003. For nothing. The '70s NASA Ames / Stanford space settlement studies said that the cost to the first small habitat for workers and everything to reproduce it would be like many other large infrastructure or industrial developments down here.

[@exist6nce]

I pray who ever reads this becomes successful

[@KhushiSharma-bg5kw]

Love how you comment this on videos! I pray the same for you! Have a nice day! =)

[@johnbabon3189]

Thank you I hope ur successful as well

[@DEMON_SUNGOD]

I hope it to you aswell man

[@atsungimchen7399]

You too mate!

[@autumnstafford]

And I pray to u :)

[@raiden5176]

Australian: "oh boy here we go again"

[@digimei2143]

Oh no. This is bad . I guess try to move fart west

[@Ithehuman]

Look's good exept one thing, giving humans power to control whether, to big of a temptation!!!

[@vincentlimseriousgamerleve2220]

that would accelerate us to become a type 2 civilization

[@franoneninenine1209]

Imagine getting mad at ur neighbor, activating a thunderstorm on them

[@TheChristianherud]

Giving humanity power to control whatever wasn‘t a good idea in the first Place imo

[@surfacepro3328]

@@vincentlimseriousgamerleve2220 wouldnt a type 1 be enough for that matter?

[@HitamiStudios]

@@franoneninenine1209 lmao, now i can finally take revenge on my annoying neighbors 😂

[@MCLLCOOLJ]

I see this and think it's a good idea... Then I remember that one movie Geostorm, heh, things didn't go too well

[@chrisdooley6468]

True or you look at Interstellar which really brought these to the popular masses and see that these can make a huge difference in extended space habitation

[@tanishqkumar1640]

@@chrisdooley6468 what about Passengers(2016)

[@MCLLCOOLJ]

@@tanishqkumar1640 if just watching that movie made me go insane (from the boredom), what do you think it will be like in real life?

[@MCLLCOOLJ]

@@chrisdooley6468 I wonder why we need space habitation again??

[@danielc9967]

Kxng J first of all Global warming is nonsense and not a threat, yes we need to treat our planet well, but our species is still young and we will improve, that said in a few hundred years overpopulation would be an become issue , as medicine would be advanced to increase the average life expectancy , that’s when this is necessary

[@DerekWorth02]

Ummm. Gundam. Remember the Zabi’s dropped a colony on earth. There would have to be a way to ensure atrocities like that could not happen. Also space noids and earthlings would have to be on equal terms unless the events in gundam could legit happen. (With that said, cant wait to pilot my mobile suit lol)

[@pauloazuela8488]

Having a space mobile suit like Gundam would actually be great if we have this kind of space colony

[@catmanx5487]

We need an army that wear Zeon uniform as well hahah

[@JFrazer4303]

Yes, because TV is always an accurate predictor. It's always been a silly idea to crash a space colony, when there are a billion rocks no one would miss, that would do the job.

[@alexanderchenf1]

@@JFrazer4303not silly. Space colonies have built in engines. They are fast weapons of mass destruction in urgency

[@SeaDemon25]

The easy solution for that is build the habitats, tow a big asteroid for resources and juat leave the solar system. 1000s of habits each one going its own way. There are bullions of stars out there

[@theprotagonist702]

"Interstellar" ending spaceship.

[@scottymanson7876]

Yeeesss!!!

[@Isai314]

Yes

[@Isai314]

That’s what I thought

[@certifiedcoffeebean]

Exactly what I was thinking about.

[@tejasram5412]

O'Neill from heaven: they called me a madman

[@Vaultboy-ke2jj]

A shining beacon in space, all alone in the night. It’s Babylon 5

[@l.t.p4941]

Can i have a sub?

[@kmbbmj5857]

As long as Ivonova is there, I'll follow. Can I meet G'Kar?

[@anthonystark3959]

Nope but you can have Londo Molari

[@notyou2353]

Man, this reminds me of when I watched B5 with my wife for the first time. I'd watched it maybe five times already, but she hadn't watched it yet. Watching the entire series, movies, and spin offs really gives on a new perspective of everything in that universe each successive time. Like, suddenly the happy, laughing, gambling drunk that Londo is when he's first introduced isn't as funny and exciting, it's sad. I remember telling my wife, as each character was introduced, "Oh man... they have a sad story...". Every. Single. One. The storytelling telling and character development of that series is amazing, quite literally the gold standard. All of their sad little stories of how they got what they wanted but didn't, how they changed each of their respective corners of the galaxy, how they changed as people. So good.

[@TrueMikeyQ]

This is amazing! one more video without a tragic ending xD

[@alexsamaris1667]

3d print it from cement made from regolith from the moon mixed with a synthetic polymer and lined with polyurethane to stop radiation. You should also design the interior with aerogel structures covered with earth and soil. This will cut down on the weight. That is if you want to simulate an earth-like terrain on the inside.

[@JFrazer4303]

What's the point of keeping the weight down? We have flying mountains to work with and it only takes a whisper of effort to move in a sea of free energy. Rock works just fine to stop radiation, and as long as it's balanced and built for the load, you could have mountains of rock with habitation inside them.

[@findingbeyond]

What if we hit 4M today Well we can!

[@yapyap3]

If you're talking about the channel, they did hit 4 mil.

[@findingbeyond]

@@yapyap3 yeah i said it can 😃

[@saltyassassin]

You did! Congrats

[@anton_c8gur]

Well thats another story of what if

[@velcro3105]

Guess We will die

[@samhyrampatriarca2076]

I'm always fascinated by space megastructures 👍👍

[@comradeinternet467]

If we build O'Neill cylinders, the colonies farthest from the earth will declare independence and drop a colony on Australia.

[@anhilliator1]

SPACE FOR THE SPACENOIDS

[@daviddixxon7909]

Finally somebody explain that crazy interstellar space station at the end

[@alexfloresjr.429]

O'Neill cylinder... Space colony... What if Gundam is real?

[@brobafett21]

I just played Vanquish a couple weeks ago and the entire game takes place in a space cylinder colony and this concept has fascinated me since. Would love to know more about how these would work.

[@JFrazer4303]

The National Space Society has the entire 70s NASA Ames/Stanford space settlement studies online, and they also have a book written back then called "Colonies in Space" by another physicist, Heppenheimer.

[@FingeringThings]

2 What If uploads in 5 minutes I was here when history was made

[@suppandi425]

What a great idea. I asked abut it to my teacher He replied. Focus on your study Suppandi

[@nuterra9143]

Isaac Arthur: "hmm looks like a watered down version of my videos." Crypto Community: "We're gonna start building this, this decade."

[@j3fron]

Just like gundam UC space colonies Just like that Can be used as weapon too, as laser colony, or space colony drop

[@kiranbanoth7999]

"O'neill cylinder" 🤔 Listening for the 1st time

[@velcro3105]

Like it was in interstellar

[@kiranbanoth7999]

@@velcro3105 yup

[@zetrtyui_azmin6561]

Yeah idea from Gundam universe

[@kiranbanoth7999]

@@zetrtyui_azmin6561 what is "gundam universe"

[@zetrtyui_azmin6561]

@@kiranbanoth7999 the design of space colony it likely on Gundam anime

[@SpardaAlucard1]

Makes me wish I lived in Gundam Seed where Zaft already had like 8 of these colonies.

[@DJLitgamer]

2 videos in 6 mins noice now I won’t be bored

[@lenardregencia]

Then we build Mobile Suits called Gundam.

[@scottjohnson4912]

I'm commander Shepherd, and this is my favorite video on the internet.

[@newworldbegins]

Arthur C. Clarke - Rendezvous with Rama - Gollancz, 1973, a 50 kilometer long cylindrical alien spacecraft.

[@meleardil]

"..came up with idea at 1974..." CORRECTION: Read the book "Rendezvous with Rama", written by Arthur C. Clarke, published in 1973. ...just for the record... Yepp! :D

[@eribruger6257]

Great video! I think the advances in LED tech mean we could light the interior with natural visible light, no UV or IR, and still have plenty of power from the panels without giving up all that space for the giant light panels taking up half the interior surface. Besides glass/transparent panels would be extremely hard to make as strong as steel. To prevent precession and give radiation and impact shielding, I think a Cylinder would have a slightly counter rotating outer steel/dirt shell ~10m thick. And mass drivers on the moon throwing modular construction parts to the assembly spot could streamline the process. Finally, perhaps we could start with a smaller 2kmx8km Cylinder, but with 10 levels (inner cylinder/axis, 5 low g levels, a big open outdoor area with an average of 3 levels for the outermost inward-facing surface area ('underground' levels and multi-story buildings.)

[@JFrazer4303]

The large cylinder with 3 windows and 3 land strips aren't feasible. First, they're inherently unstable, wanting to tumble end-end. Yes, it can be actively countered, but it's never a good idea t rely on complexity to overcome basic physics. Second, those windows are all a straight path inside for cosmic rays. You need ~+ 6 feet of sand to stop them down so the dose inside is like a 1.7km elevation city down here. We won't have transparencies for that anytime soon. The "windows" or light-pipes brining in Sunlight don't have to be half of the interior surface of a habitat. Light can be concentrated to come in a small aperture, with mirrors to bounce it in while stopping cosmic rays. Light from overhead would come from a point or small spot overhead.

[@suarsuar747]

This channel is amazing.... Love from *India....* 🌹🇮🇳

[@ramenfever2695]

What if we can be gods. KZbin: lets recommende this in people feed

[@user-ey1ms7dj8i]

Yea we can but not that powerful as how powerful our God is!

[@copiumuser3134]

@@annagruber7040 another atheist butthurt

[@dhivakar111]

@@copiumuser3134 And what's wrong with that

[@Inonimate]

1970: Are ya mad, what are you speaking about 2020: We can make this 2090: Thanks to sir o Neil for this, it's good to live inside this

[@mannycampos6885]

Can you do. What if AI robots became self aware?

[@nngxlden3483]

I'm curious about that too

[@ronjayrose9706]

Already did it

[@brawmankerlexterminateurde860]

Like ultron and brainiac

[@3000-z7p]

Well the Geth kicked the Quarians off their own planet. So it wouldn't go well I reckon.

[@Odysseus10001]

Arthur C. Clarke explored this topic in his 1973 book ‘Rendezvous with Rama’. He wrote three further novels in the series and Gentry Lee wrote an additional two books set the the Rama universe.

[@qfrvd]

they: *Building the cylinder* someones daughter:

[@goodenglishstudent]

What?

[@chathao1315]

@@goodenglishstudent copyright law claim will goes on and that someone daughter will claim for her great grandfather etc

[@mongolianfishingvillages1371]

@@chathao1315 don't get it

[@jamesward4043]

This makes no sense

[@liljay8750]

i think it means that she would have to go on the cylinder

[@keithharper32]

this is actually a better idea economicaly than many people think. I have seen articles proposing this as the solution to some upcoming shortages of agriculturally produced products. Many grown resources, such as rubber and cocoa and other such things, require very specific soil and climatic conditions. Here on earth such places have already been claimed and developed, leaving little room for expansion of production. An enclosed habitat however could have those conditions artificially created within, and more space could be created by building more. A bit far fetched in the current conditions, but if demand for such things expands or climate change or soil depletion reduces current growing capacity, it may become necessary

[@nervun8097]

Everybody gangsta until one of these cylinders declare themselves as The Zeon.

[@anhilliator1]

Well, it wasn't really one cylinder- it was basically the entirety of Side 3.

[@Ketchem708]

Doctor who did this brilliantly with the 2017 cybermen two partner, the mondasian colony ship. Shame the engine room was stripped bare to make tons of cybermen and hospitals, could've lasted longer.

[@KhushiSharma-bg5kw]

There's this rare WHAT IF video in which you don't die! Appreciate

[@anhilliator1]

Space colonies where people don't die? Gundam would like to talk.

[@Jerry7-7]

This made Jeff Obsessed with that building

[@marketslice5030]

What If Channel: What if we could live off-world? Me (underneath comfy blankets and surrounded by snacky snacks): What if I left my living room?

[@vinayakmalhotra5317]

If you left your living room it would open a new age of technology and advancements for the whole of mankind

[@dtvjho]

I'd start the description by first describing the floating wheel design. Explain that the ring, as a design, doesn't offer much floor space or living capacity. The radius is the limiting factor, when combined with rotation speed, they need to function together to keep local gravity near 1G. An increase in the length of the cabin would increase the radius, and yes the rotation speed could be reduced to compensate. Larger radii and slower rotation have advantages to the people living inside, but the tensile strength of metals limit how big it can go. The other option is to simply widen the cabin. There is no limit per se, just keep extending the width of the cabin along the axis of rotation, and you end up with the cylinder.

[@jonathankey1533]

The problem with spinning something to make gravity is that it wouldn’t feel right. Particularly every time you turned your head quickly you’d likely get dizzy because the rotation affects the rotation of the liquid in your inner ear.

[@JFrazer4303]

NASA studied this. Using not just astronaut test pilots, but secretaries and custodians and interns, just about everybody can move right in with no trouble if it's 1 RPM, which means ~900 meters radius (See the "Stanford Torus). Many people are OK with 2 RPM: 250 meters radius. A lot of others can fairly readily adapt to that, but the faster/smaller you go, the fewer people can. Astronaut test pilots by the numbers aren't much better, but can be more motivated to push through and force adaptation. At low spin rates, people have lived for weeks in a rotating reference frame. Animals have lived for generations in higher than 1G, in centrifuges down here. They're stronger, more healthy and live longer.

[@jonathankey1533]

@@JFrazer4303 I’m not saying it’s impossible, just that’s it’s more uncomfortable

[@TheNapster153]

@@jonathankey1533 It's something the generations living in the colonies would get used to overtime. Even the first generation to be born on the colonies would be readily inclined to expand their habitat very quickly.

[@anhilliator1]

@@TheNapster153 ... Is your name Zeon Deikun, by any chance?

[@ennui9745]

​@@anhilliator1 We found the proponent of Newtypes and humanity moving to space!

[@uzumazin5099]

*Dyson Sphere (Layer 1)* *Matrioshka Brain* *Heat Conditioners (Layer 2, 4, 6, and 8)* *Ringworld (Layer 3, 5, 7, and 9)* *O’Neil Cylindar* *Solar System Barrier (Layer 10)* Put it together, what do you get? The safest place in the universe.

[@DesertDog]

I am not going to lie, I saw this and the name O'Neill, and I was thinking Stargate

[@Vaultboy-ke2jj]

Oh man, wrong franchise, Babylon 5 was an O’Neill cylinder

[@DesertDog]

@@Vaultboy-ke2jj Was it? I haven't watched it yet, but it is on my to-do list.

[@Vaultboy-ke2jj]

DesertDog1178 it was indeed. Definitely give it a watch. One of the top three sci fi shows I’ve ever seen, alongside BSG and The Expanse

[@munchcleveland]

Yeah, that's the first thing that came to my mind.

[@DesertDog]

@@munchcleveland right on, "O'Neill! Two L's!"

[@inachu]

We could have one built in under 10 years if we use automated robotics that follow blueprints. You would just need over 20 types of robots. welders. motherships for charging and communication updates and reprogramming. other robots to supply the tool swap outs and repairs.

[@driptcg]

About gravity... just came from a similar video where they mentioned if the diameter was too small (like in this case) the centripetal force you'd feel would vary at diferent body parts, causing blood pressure issues. So you'd have to have a bigger station so the Centripetal force is even throuhh your whole body

[@JFrazer4303]

The first model which the NASA Ames/Stanford studies in the '70s depicted, were about a mile diameter tire or torus. 800 meters diameter drum or sphere was also designed, for a slightly higher spin rate, but still slow enough to allow _most_ people to be comfortable inside.

[@antred11]

A diameter of severla km is ***not*** too small. The effects you're talking about apply when the radius is just a few hundred meters or less.

[@Some_Cat_]

A spherically hollow cube would be good too. It would mitigate the effects of uneven gravity whilst providing loads more surface area compared to a planet of the same mass.

[@anhilliator1]

Just call it a Shieldworld and be do e with it

[@theocan]

I love realistic sci-fi and Cyberpunk, so looking at the first commercial test flights to space really puts this into a more realistic perspective. What's the next step following flights? A destination! They either start building from the ground up, or corporations arrange a joint operation with governments and recommision an existing station, where they build upon an already existing base. But, this is small scale, so where do we go from there? A fully established colony! You turn the existing station into a relay for resources and staff, and then forward those resources towards the production of the full scale station. Once it's built, of course it will mostly be arranged for the rich, but who maintains something on such a large scale? The working class! You need to consider living quarters for maintence, hospitality & agriculture. Over time, the rich start moving onto smaller and more exclusive installations, this then slowly reduces the cost of space flight and colony living as a result of the higher demand of workers, and from then on, humanity has made it's first steps towards life in space. It probably won't happen in my lifetime, but I'd like to think I'll probably see step one or two begin to take place over the next few decades.

[@fatejsin]

we park the O'Neil Cylinder at a Lagragian where it would stay in place without... and we call it Side 1 😂

[@debrajenkins1622]

I'd like to see how they built the International Space Station.

[@anhilliator1]

Module-by-module. First module, _Zarya,_ was launched by Roscosmos.

[@JC-ze2et]

interesting fact- if an asteroid did put a hole in an oneill colony, depending on the size of course, it would actually take a long time, possibly days, before enough air leaked out to become dangerous. think of a full balloon that you then stick a pin into (without popping it); it takes a loooong time for all the air to leave through that tiny hole

[@yoongummy1585]

I’m just sad I probably won’t be here when these things are created🥺

[@TheBestOne382]

No we wont

[@Georgieastra]

Question for a scientific or engineering type expert: If the cylinder has different levels or decks ( in the video it says it might have one 250 metres inward from the outer level) would somebody standing on the inner deck experience the same gravitational effect ( ie 10ms²) from the rotation of the cylinder as somebody standing on the outer deck? Would the effect be the same, or lesser, or greater?

[@JFrazer4303]

see the site "spincalc".

[@supercreativeusernamebcidk]

Next do: what if we stopped using money and everything was free

[@carnosinehobs7759]

It is possible to control the climate of the Earth to a fine degree, we just need to design and create the large structures needed.

[@shahabss1152]

Video idea: *what if there were no producers in food chain*

[@thenightbringer9770]

Shahab SS then there would not be a food chain

[@quintaviousgates1813]

Tamara Pierre true

[@shahabss1152]

@@thenightbringer9770 I mean what would be the condition of consumers How will they manage to get food

[@Theguywithspectacles]

@@thenightbringer9770 let what if make episode. It will be interesting.

[@indredcold3191]

If you continue to investigate the entire O'Neal theory, it is also a power station able to travel into interstellar space. Dr. O'Neill's idea in the end was to allow generations to travel to new worlds, and new systems. When we first learned of this in my Science courses, it was, and is though to be a plan for self preservation, using only the energy from solar winds, and other propellants, we as a species could travel well beyond our own system. Far into interstellar space, farther than any of us could imagine. It was thought this "traveling home" could allow further generations to explore and colonize other systems and worlds. It was an amazing thought, something we could do as a species, if like I have said before, we could all get together and agree with each other. Forgetting our ridiculous and petty thoughts. We could have, and could still achieve so much more if we could only work together. Side by side. White, black, brown, Catholic, Baptist, Jewish, christian, it really does not matter anymore. It never has. It would be such an wonderful, and advanced species to come together, as ONE.

[@hygog]

they will rebel, like those in Side 3.

[@johnohalloran3446]

Two of the biggest flaws with any habitat like this one are we can't use direct sunlight and truly massive single point of failure. The reason we can't use direct sunlight is that without 50 miles of atmosphere sunlight is toxic. The need to have a massive contiguous transparent surface that was both a radiation shield and filtered out all the spectrums above Violet would double the overall cost of the hull if we even had a material that could do it. One of the main complaints about most large sci-fi vessels is that they have so many windows. The reality is windows are a point of weakness. The massive single point of failure is related to large ocean going vessels. If you lose pressurization in any part of an O'Neill Cylinder you begin to lose pressurization in the entire volume. Though the intent on Earth is to prevent sinking a similar rule would be applied to orbital habitats. I think that most habitats would restrict compartments that could be independently air tight to no more than 100,000 sq m.

[@Hirohii3]

Instantly reminded me of Gundam.

[@l.t.p4941]

Can i have a sub?

[@antthonyprime]

Zeon liked It

[@mosalah8551]

@@antthonyprime actually Zeon hate it. they are a group of peasant and poor people of earth that has been relocated to space because of over population so the elite and rich people can live in earth

[@mjbirdClavdivs]

You've missed a very important piece. You need to make a pair of cylinders, counter-rotating which have they're endpoints connected. Otherwise precession would get it going out of control. Also, O'Neill updated his design to NOT use a Lagrange point. I think that putting 2 pairs of colonies on either side of the Aldrin Mars Transfer orbits would allow continuous travel to/from Mars safely and you would have a full-time staff that can maintain and service the tourists.

[@mbogucki1]

"What If We Built Babylon 5" There we go, a more relatable title.

[@battleship6049]

Or "What if we built Gundam's space colonies?"

[@ervamoten5830]

@@battleship6049 Yes, suitable title.

[@gameskape2585]

This is only possible if all of humanity work together.

[@LegendGamer-je8is]

Not any time soon

[@spontaneousdx1635]

dream on!!

[@ルーボアリラトスーオ]

Don't drop it in Australia!

[@brianarbenz1329]

Reading the 1974 proposal written in the September 1974 Physics Today by _Gerard_ O'Neill (as opposed to this _Gerald_ O'Neill you mentioned) is uplifting and fun. There were many assumptions to his vision, including that humans would have built a manufacturing facility on a space station called L-5 to turn lunar rocks into useable construction materials for the cylinder. No L-5 means no cylinder. O'Neill's '74 article is more invigorating speculation than a plan.

[@debkumarganguly3160]

3:49 reminds of the advertisement of the AXIOM from Wall-E

[@abhiscosmicmusic6880]

Congratulations for 4M subscribers

[@maxmega42]

Now commencing; Operation: British

[@anhilliator1]

MOVE OUT OF SYDNEY IF YOU WANT TO LIVE.

[@bensweeney5878]

I've always imagined a setting for a story where 30 of these fly in a fleet and the people who live in them fly in between them with specially designed starships like we go to other countries, and this is just the world they live in as they go generations through interstellar space, one day hoping to reach a distant world.

[@domsquad4209]

Does one obliterate Sydney?

[@bensweeney5878]

@@domsquad4209 I leave that open to interpretation at the moment

[@CaptainAce847]

We'll be able to build this in the far future and the only thing stopping us is that humanity isn't united

[@hangsu6261]

Jeff Bezos: We should build an O'Neill Cylinders. Terrorism: I like your idea.

[@anhilliator1]

Zeon: "You Called?

[@cineomaniac3388]

What if This channel never existed !? 🤔

[@SamTheDutchMan]

Then we never wondered this

[@ronjayrose9706]

I'd be sad

[@xenobell2475]

Ronjay Rose no you wouldn’t because it would be nonexistent

[@User-ys8pm]

>:(

[@fshffkf]

I would die

[@meleardil]

"..came up with idea at 1974..." CORRECTION: Read the book "Rendezvous with Rama", written by Arthur C. Clarke, published in 1973. ...just for the record...

[@JFrazer4303]

Clarke didn't establish that there were no new inventions needed to mine asteroids and moons and to build for virtually Earth-like conditions within timescales and for levels of funding like very much we already do all the time. Clarke didn't come up with a real useful reason why we, today (in the '70s) should think about setting about making it possible. BTW, O'Neill and his class of students came up with it 4 or 5 years earlier (again, as in a realistic thing we could do, not just a hazy "wouldn't it be cool if...?")

[@Freqsheux]

So...Mass Effect then. The Citadel.

[@l.t.p4941]

Can i have a sub?

[@meleardil]

"..came up with idea at 1974..." CORRECTION: Read the book "Rendezvous with Rama", written by Arthur C. Clarke, published in 1973. ...just for the record...

[@gfa7443]

Thanks,cause even this would help us to travel in space which is something in our future ambitions😎💪

[@vancefr]

I remember fighting kazuya in one of these in tekken 5

[@Mavrik9000]

Looks fun, but don't think about the pre-meteor objects.

[@dark_edit7043]

Happy independence day❤,love from india❤

[@thelasttimeisleptwas4919]

What....its 4th July man!...(indian too) Edit: oh USA...my bad

[@malcolm_in_the_middle]

It would generate a centrifugal force, not a centripetal force. You would have to exert the centripetal force in order to make it spin

[@youtubezone1851]

this reminds me of Elysium

[@stacchk64dta37]

Yep except it's a ring

[@cubife6451]

I'll be so happy when I first board an O'neil cylinder, because it would be like cooper station from my favourite film Interstellar !

[@Chaz_Mahoney]

It's like the citadel from Mass Effect

[@rafaelrivera9346]

Chaz Mahoney Rama from Rendezvous with Rama from Arthur C. Clarke