Exodus Fleet

A continued look at Generation Ships and Interstellar Colonization.
In order to colonize the galaxy, we are going to have to spend huge times on board equally huge spaceships. To move thousands of people, and our ecosystem, to distant planets, will require not only giant ark-like starships, but entire fleets of them. Today we will examine how we could do this even if physics never offers us any superior methods in the future for covering the void of interstellar space faster.
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Credits:
Upward Bound: Power Satellites
Episode 145, Season 4 E31
Writers:
Isaac Arthur
Editors:
A.T. Long
Darius Said
Derek Hightower
Evan Schultheis
Gregory Leal
Keith Blockus
Mark Warburton
Sigmund Kopperud
Producer:
Isaac Arthur
Cover Artist
Jakub Grygier
Graphics Team
Fishy Tree
Gateway Foundation
Jarred Eagley
Jeremy Jozwik
Kristijan Tavcar
Kris Holland of Mafic Studios
LegionTech Studios
Sam McNamara of Rapid Thrash
Sergio Botero
Narrator
Isaac Arthur
Music Manager:
Luca de Rosa
Music:
NJ Mandaville, "A Long Way Still to Go" / nj-mandaville
Stellardrone, "The Edge of Forever" stellardrone.b...
Kai Engel, "Endless Story About Sun and Moon" www.kai-engel....
Chris Zabriskie, "Mario Bava Sleeps In a Little Later Than He Expected To" chriszabriskie.com
Aerium ft. Sieger, "Deiljocht" / @officialaerium
Lombus, "Goldilocks Analemma" lombus.bandcam...
Sergey Cheremisinov, "Naive" www.s-cheremis...
Ayreon, "Theory of Everything" / @arjenalucassen

[@ahmedwael3824]

I can’t help but feel that every Science fiction writer in the future is going to be influenced one way or another by this channel.

[@floydlooney6837]

I can believe it

[@danielreece3996]

The entire way sci-fi writers were referred to was changed in 2035. They are called "Isaac Authors" now...but only if they are exceptional at what they do

[@pimpabootejettanut122]

You bet... (Writing sci-fi stuffs)

[@ranekeisenkralle8265]

I sure would like the idea, but from what i am seeing the quality of entertainment - writers included - is currently declining rapidly with the current corporate climate of recycling and re-releasing old stuff over and over.

[@HoshikawaHikari]

Ahmed Wael I already have a plan to make a manga series using the knowledge I’ve gained from watching his videos~

[@Drew_McTygue]

The animation for these ships/ stations is epic

[@daxwax1]

Yes the animation has gotten so much better in the last year or so. This channel just gets better and better. Also the music is just beautiful.

[@Zarcondeegrissom]

yeah, I am really happy to see Unity again, that was a very nice series, and like others say, the CGI keeps getting so much better. B)

[@remcolangbroek656]

Did you discover the 2.79 denoiser? :) That ship wharf must have been a ton of work!

[@gregbrockway4452]

+Isaac, I don't know how you guys do it but your videos keep getting better and better. Absolutely the very best channel on KZbin! Today is my son's birthday and I'm going to send this outstanding video. Thank you so very much.

[@_BLACKSTAR_]

Agreed.Always interesting and very informative.I hit like before I watch. 8- )

[@gregbrockway4452]

+ben nichols; thank you very much, that was kind. With the help of modern technology we Skyped.

[@dantastic044]

This is only my second video of Isaac's, but I have to say, his comments section, and your comment thread in particular, are just so pleasant, and such a nice thing to see on the internet. I'm glad you got to talk to your son.

[@Vorpal_Wit]

The graphics have really stepped up. My compliments to all hwho have given their efforts on this. Well done. And though it goes without saying, I will say it anyways - Isaac, your content is consistently outstanding. Thanks.

[@davidthornton5327]

If it's labelled "a stupidly powerful laser" by Isaac..

[@jeffreymilliman2306]

It might be my imagination, but I swear it sounds like Isaac nearly giggled a little after he said it. I know I did when I heard it. :-)

[@davidthornton5327]

Definitely stirred a chuckle, Jeffrey :D Great video again, as confidence in expectation keeps growing.. no pressure Mr. Arthur, Sir ;)

[@annoyed707]

You know somebody is hatching a plan to abduct Isaac and put a laser on his forehead. Madness, of course. Sharks are better swimmers.

[@KeithSchultz1989]

Then it is stupidly powerful, by definition

[@davidthornton5327]

@@KeithSchultz1989 Then it is likely impossible, is the joke.

[@joefarah06]

Yet another top-notch and thought-provoking look at what the future will hopefully hope for humanity. Your videos have me excited for the the future and crossing my fingers we figure out life extension tech before I die so I can witness our colonization of space. SFIA forever 🍻

[@ferrusmanus4013]

Joe Farah I want to become an immortal cyborg and have AI robowifu....

[@primachpepe8597]

shit days at work can be washed away into the cosmic sea by the soothing contemplations of the future depicted by you and those that help you.. thank you Isaac for being a beacon of light in the void

[@uTubeMeltsYourBrain]

People in the 1880s I’m sure fantasized about “the astounding wonders” of 2018. It’s great to think about the future. But don’t mourn the world you’re in. It’s a pretty great one

[@mechredd]

The 5G evasive maneuver reminded me of a scene from a show called Knights of Sidonia. A rediculausly huge generation ship had to do a double digit high G emergency maneuver and something like 1/3 of its crew died as a result. I don't remember the exact g-force but I do remember thinking that it would kill a bunch of people. I also don't remember the exact death toll but it was insanely high.

[@garethbaus5471]

For double digit G forces 1/3 of the population seems pretty low.

[@mechredd]

@@garethbaus5471 the crew had been genetically modified to better survive in space so the high G's may not have been as big of a problem for them as I first thought. Splattering against the wall when their safety harnesses broke was the problem graphically depictedin the scene. The ship was built out of a hollowed our asteroid and was something like 1000 years old. It had several large open areas inside that contained small cities. Some walls broke, and many hard points that people tethered themselves to failed. People would essentially fall sideways for a quarter mile before hitting a main bulkhead or building at several times terminal velocity.

[@eclipsenow5431]

The music and CG combinations illustrated the concepts so well it was almost a religious experience. Well done!

[@oldkid8811]

IA you are the best! Thanks for your work!

[@chronus4421]

You used the term "Colonial Fleet" That made me happy. So Say we all!

[@sequoiahughes8536]

Chronus so say we all

[@anycombo]

SO DAY WE ALL FRAC IT ;)

[@AceTycho]

So say we all.

[@guym458]

Keep up the incredible work Isaac.

[@Edenssunlight]

Arthursday... *BEST DAY OF THE WEEK!!* as always Isaac another great episode so good in fact it makes my coffee even better!! Lol thank you for never giving up!

[@rudiratte1]

I listened to the "Rendevouz with Rama" audiobook on your recommendation, it was great

[@joefarah06]

pancreas so did I! I just got done with it. I’m working my way though all of isaacs recommendations

[@Travlinmo]

pancreas Isaac: please you your tremendous power to get Audible to get the other books from the Rama group done. At 275k subscribers, you must have the power to tell amazon what to do...

[@natehigman3987]

I've only listened to the first hour and I already love it.

[@johnnie2638]

Fantastic novel. I read it when I was a teen back in the 70s and have reread it a couple of times in the decades since. I've hoped for a movie version for over 30 years.

[@avaevathornton9851]

I'm really impressed by how you manage to put these out every week. I know you have a bunch of people to take care of the video editing and graphics, but even with that, it would probably take me a few months to research, write, revise, and record something like this.

[@daxwax1]

One of your best Isaac! The mental image of a giant 3D continent of tethered space-cities blew my mind. Incredible.

[@vexion637]

Nobody keeps my attention for 30 minutes better than Issac. Love the videos.

[@TreyNitrotoluene]

I keep hearing comparisons to aircraft carriers but the private sector has already matched that for fun, literally. "The gross tonnage of Oasis of the Seas is 225,282. Her displacement-the actual mass of the vessel-is estimated at approximately 100,000 metric tons (110,000 short tons), slightly less than that of an American Nimitz-class aircraft carrier."

[@AvailableUsernameTed]

On the Spaceship Named Desire - "Lt. Kowalski. the sails are deployed, ask for a push." "HEY STELLASER!! STELLASER!!!"

[@Nobody-11B]

I'm so happy I decided to wake up today. Happy Arthursday folks!

[@illidril17]

I've always been fond of "Exodus Fleets" the idea of a species being forced off their home world is, deeply in thrilling to me.

[@anarchofuturist3976]

Okay, now THIS is epic

[@JuxtaposedStars]

Are you familiar with Knights of Sidonia(SIdonia no Kishi)? It has both a manga and animated version(available on netflix i think). The manga is a bit more detailed(and the CG animation style can be difficult for some to adjust to)but both have some excellent generation ship designs as well as interesting speculative science concepts and several examples of mega-engineering.

[@utube6342]

Absolutely, the best space-related videos on KZbin. Better than most movies! FIVE STARS

[@junkyardzombie13]

Great video sir. I like how all the other science channels I like all come back to saying how your channel is one to strive for. Curious Droid and Answers with Joe are two of my other favorites. I'm really looking forward to September's video.

[@davidclarke4301]

You're really doing some of the greatest documentaries on KZbin. I'm always eager to see a new vid. Keep up the truely excellent work.

[@joeivo911]

Isaac interview??? Yes please!!!! Can’t wait to hear it.

[@simoc24]

Why this guy do not have a million subscribers is beyond me...keep it up Isaac :)

[@mgpmisterk2322]

This is easily my favorite KZbin channel of all time, nothing else holds my attention quite like you do, I hope the governments of the world go on to learn some things from you, and begin applying the concepts presented in these videos, been here since just before 10k subs. Im so glad you're getting all the attention you deserve so much, let's hope you get about 10x more here in the future

[@brents5799]

275k subcribers almost 300k wow

[@SensibleSalamander]

I started watching your videos a few months ago and it has quickly become one of my favorite series! Keep up the great work!

[@umbrash]

28 minute video posted 3 minutes ago, 50 views, 24 likes.

[@thecount25]

Umbrash time travelers such as myself love Isaac's videos. I was going to post before you did by using my time machine but I'm eating chips and I don't want to get the controls dirty.

[@Travlinmo]

And the obligatory thumbs down.

[@AkiAiromaa]

This channel is one of my favourites. Im half way in to the episode, but can already say the quality is what I exepted. I am entertained 😁

[@Mr.Deleterious]

I love that once a week i get to completely shut down and immerse myself into the void of space and watch the probable future prospects of humanity unfold on my phone in a dark room and with, of course, my snack and drink lol.

[@Paint2D_]

I like that this video comes out the same week as "record of a spaceborn few" witch takes place on a exidus fleet.

[@Comicsluvr]

It occurs to me (and my next book will include this concept) that a ship that leaves Earth in 2050 using whatever tech we have at that time might be surpassed by a later ship using better tech that is developed later. Imagine that a 'century ship' with a projected travel time of 100 years might arrive at their destination only to find that a faster ship with better tech left 50 years later but arrived a decade earlier.

[@cannonfodder4376]

Another video that gets my mind racing. You and your teams efforts always make me smile and hopeful for the future. Goes great with lunch or washing dishes. I am also currently listening to "Rendezvous with Rama" that you recommended and am loving it right now. I am looking forward to the next episodes, especially "Jobs of the Future", something humanity really needs to confront right now.

[@michaelmoldrup1339]

Hi Arthur, After seeing this video for the second time, I got an idea of how to brake a starship at the destination star. Instead of using the braking method you suggest by sending a series of starships each braking a little and thereby helping the next, I suggest this: 1) Send your starship using stellaser 2) Your starship is a giant "Mass driver" that can accellerate packages (Projectiles) using magnetism. 3) When approaching the destination star, fire off Projectiles in a series of shots. This will slow you a little down. 3a) The projectiles will have the speed of your Starship and the speed added by the Mass driver. 3b) The Projectiles is fired in a way that they will slingshot around the star and come back to you. 3c) The "giant Massdriver starship" can now catch the projectiles doing the reverse of firing off projectiles. (And possible magnetically adjusting projectiles' flight-vector before catching them, like a buzzard ramjet is thought to do with hydrogen) 3d) Your speed will be greatly reduced by "catching" these high-speed projectiles. 3e) The faster your starship goes, the faster the projectiles are. 3f) You only have to add "a little" energy to the projectiles, not much matter. And you can regain your mass by catching it going back to you. 4) Of course you will have to be very exact at firing the projectiles, and it's potential dangerous, but hey this is SFIA :-) 5) You will actually be able to accellerate using this "mass-less" technique as well. 6) As long as we depend on mass for propulsion, this has to be the most efficient way of accellerating. Only adding energy for accelleration. 7) Without doing any math, I can conceive that only a smaller mass (maybe 1% of the starship) needs to be projectiles for any starship speed. (remembering 3a, and the fact that you can adjust the parameters to fit: firing time, projectiles speed etc.) What do you think? Isn't this a way better way of braking a high speed spacecraft at the destination? Please let me now if you think this is conceiveable.

[@isaacarthurSFIA]

You can't realistically slingshot a high speed projectile around a star, that only works if it's moving in the zone of that star's escape velocity, way under even 1% of light speed, and it's also speeding up as it approaches from that same gravity pulling it toward it.

[@michaelmoldrup1339]

Isaac Arthur I see, thank you for your elaboration.

[@seamuscallaghan8851]

When you talk about transporting ecologies, please talk about how acceleration could affect trees, especially in rotating habitats. Specifically, if acceleration of the ship occurs along the axis of a rotating cylinder, any trees standing along the inside surface of the cylinder would experience an apparent horizontal force, which could potentially topple them if it is too high.

[@JimBurr101]

And now for the best commute of the week!! Thank you Isaac!!

[@DavidSanchez-vx4bv]

Nice video. Regarding the slow down problem, one technique that the NASA and other space agencies use is the gravity of the planets, moons or even the star we are visiting. The idea is to enter close in an orbit with that planet/star and just use fuel to pass from one orbit to other, like doing an spiral. This means that the ship will need to pass several times around the planet/star and when the speed is much less the use fuel to go to final destination.

[@palfers1]

The double Stellaser idea is really cool!

[@TokyoTraveller]

Thanks Isaac, great stuff! Thinking about things like this make me feel more optimistic about the future, and think if there is anything I can do to help bring it to pass. Channels like this are especially necessary in these times of great uncertainty and stress. Thanks.

[@ihaveyoud9553]

Thanks for uploading, Isaac.

[@grassyclimer6853]

really uped the model quality good job to whoever does that.

[@Ryukachoo]

Anyone else get into revelation space because of Isaac? Holy shit that some good hard SciFi, almost finished with absolution gap and what a ride it is

[@infocat13]

What is 1% of the speed fight to Alpha Centauri? 450 years?

[@infocat13]

A very large spacecraft at 1% is about the age most civilizations last that long

[@natehigman3987]

437 years or 425, if you're heading to Proxima

[@giordanobruno9106]

Congratulations on meeting your Patreon goal, you deserve it.

[@inventionexchange]

Excellent. Colony ships are like scouts.

[@LuisFernando-pq4bq]

Hey Isaac! I'm a big fan of your channel, love the ideas and the way you present them. You just keep getting better and better!

[@Witnessmoo]

Man I remember when your channel had only about 50k subs... now look at it! Well done Isaac. I always look forward to your vids.

[@isaacarthurSFIA]

I still remember getting a message from KZbin back in late 2014, "X had subscribed to your channel" and going "What the heck is a subscriber?" :)

[@12201185234]

Yet another awesome video Isaac! I look forward to your videos each week. I love what you do, man. Keep it up!

[@bobbucks]

I would love to see space military sagas made into movies with this animation. Frontier Saga would be a good one. Keep it up man.

[@KevinDavis338]

Very good. I would like to see an episode on a planet beyond our solar system and Alpha Centauri

[@TGNXAR]

August looks like it has some great topics upcoming.

[@cluckeryduckery261]

I've been looking forward to this episode for... well two days. He only announced it a day or 2 ago. But since then... great anticipation. Also, exodus fleet sounds like the great beginning of a sci-fi series. Isaac Arthur novel confirmed??? Edit: another KZbinr i like, Jeremy Scott, better known as cinemasins, wrote a novel, The Ables, that i quite enjoyed. I used a lot of commas in that sentence. Anyway, i think an IA novel could be a great triumph. A more successful attempt at realism in the vein of Card, wth similar character development. Im thinking he'd be in the same vein as Ramez Naam or Daniel Suarez... realistic to the point that yeah, this might actually be happening now or very soon.

[@matc87]

awsome vid isaac

[@Asstronut]

Discovery should of had you host the show "Through the Wormhole, with Isaac Arthur". Your videos much better than anything Discovery or Science channel has done though, so thanks for the hard work!

[@greypaladin4560]

Personal opinion ahead: If I had to design a colony ship I'd make it a modular "mini fleet" ship where the engine detaches from the habitat and other components and they then fly 100 to 1,000,000 km apart. Then put early warning drones and shields ahead, and thus leave the most massive and thus slowest components out back. And also leave the engine furthest in the rear. That way all the stuff that cannot maneuver as fast is given extra warning time from the components ahead of it. And, if your engine is a "flying bomb" type engine (antimatter or anything else where the fuel could explode if anything goes wrong and ruin your day) it is given the most warning and reaction time. And, if it does explode the debris is behind your habitat. Though if I could I'd have the fuel separate from the engine and have a "pac-man" ship with emergency fuel supplies on route or waiting up ahead. Maybe even an extra engine or two. Though, I'm a very impatient type of person so if I were making a ship to get there as fast as possible I'd have a pac-man ship but instead of fuel I'd send out large focusing lenses to refocus a stellaser for most if not all of the journey. Sort of a temporary and janky laser highway.

[@hiangbun]

All this is a lovely notion but to do anything like you are putting forward requires a population many times currently Brilliant channel

[@commentguy4711]

It would be pretty awesome for someone who never lived on a ship arrive to the horizon of a planet and look down on the endless options awaiting you on the surface. Great graphics! 6:14

[@who-manwho4182]

Your the man Isaac keep on bringing it

[@calvingreene90]

If you were to build a circular particle accelerator you could bring subatomic particles up to the mass of huge freight trains and then accelerate it in the opposite direction than you wish to move your ship. This is admittedly a very complex rocket but if the Accelerator ring is on a plane perpendicular to the direction of thrust you could then take your exhaust particle and lower its sideways velocity and thus its mass to the point that you could then bring the particle back to the primary accelerator ring without losing all the velocity gained by deflecting it rearward. This is not a reaction-less thruster it just appears to be one from the outside.

[@EdricLysharae]

Oh the worlds we will one day see.

[@Bra-a-ains]

1. Pee - check! 2. Iced Tea - check! 3. Pumpkin Seeds - check! 4. Get comfortable in chair - check! Start the Isaac Arthur video!

[@NuanceNotes]

Another awesome video bro. Thanks for sharing.

[@maxwellvandenberg2977]

You could counteract high g forces with diamagnetism, as long as you keep metal out of your living area and make your ship in such a way that it isn't torn apart.

[@jonathanhensley6141]

Yes all scyfy games, shows and movies need to have IA consult for them. Awesome video.

[@peterd6584]

Yay!! Happy arthursday!

[@arnom1885]

I love these video's! Can't we turn it into a massive series to bridge the gap until we're actually able to do all this?

[@masochisticmeese3555]

I don't know where else to notify you. I just wanted to say, KZbin unsubbed me from you, but I resubbed. Which is weird, because I usually binge your videos

[@GreatGreenGoo]

+Isaac So when are you going to write a fiction book? I really want to read something you can come up with

[@Flea777]

This channel deserves 100mill subs

[@jetflaque8187]

Great work isaac

[@enerjohnsavior3227]

Thinking about #stellasers: might want to direct them slightly out of the ecliptic plane?

[@Krystallen]

Another awesome ACE future vid from Obi-Wan-Issac. I cant stress enough how awesome your videos are. You use real science, with possible tech and development like I havnt seen before. Neil deGrasse Tyson has been the star in science for me. Isaac has now passed Tyson, and is my NR 1 to listen, learn and enjoy the future with! I liked your "Alien encounters" series the most. Do you have any plans to add more "Crazy-Smart-Fat" aliens videos? I would looooooove that! I would really enjoy your view on how a possible encounter with aliens races would look like. If you use the Star Trek "Warp Tech requirement", how would that unfold? IF there are galactic teams of alien races, where they contact us first when "we are ready". How would that look like? How would the politics in galactic empires look like, with aliens psychology like: Humans - Klingons - Romulons - Ferengi - Borg, if they all are around in different empires?

[@benjaminoris5592]

I was wondering if you would do a show on refining materials in microgravity. Mining materials in microgravity is somewhat straight forward but refining them seems a whole lot more difficult and I haven't seen much on doing that. Thanks

[@r.m.renfield4541]

I liked the piano music (as well as the video, of course).

[@SailorBarsoom]

Cool ep, and looks like a LOT of fun coming up.

[@Jondiceful]

Maybe I missed it, but launching those probes from your generation ship will also provide some breaking thrust. Using a railgun/massdriver to launch them would eliminate the need for fuel, and if that stellaser is providing power that might not be a bad idea. It could also work with your nav computer to eliminate small objects you encounter en route, although I would still want a laser too. And each probe launched does reduce the mass that you will need to decelerate at the end of your journey. As for the stellaser, I wonder if it would be possible to modify its beam to double as data transmission. You are catching the beam with a giant antenna array after all. If it could transmit information as well as thrust, it may be possible to augment your crews en route by beaming an intelligence with the requisite skills to address the needs of the crew/mission as they arise- plus transmission time. This is important because if you don't need a geologist until you arrive, you can just beam his/her mind over as they are arriving. Androids could be used to house these transient intelligences. In this way, you can reduce your crew and the habitation space and support systems. The less mass on each ship, the faster it can accelerate and slow down. So eliminating the mass of even a few dozen specialists that will not be needed prior to arrival could save the mission a lot of time. On a similar note, if 3d printing of living tissues can ever achieve creating living organisms either micro or macroscopic could save literally tons of mass because you would not need to keep your future biosphere alive for the entire journey. You simply fabricate it on location when it is needed. Without needing to provide a biosphere with shielded living quarters, you can save huge amounts of mass and necessary crew. The crew itself need only contain a few dozen fertile individuals and a freezer full of thousands of fertilized embryos ready for implantation. And as for the materials needed for colonization, much of that could be manufactured after arriving with resources harvested from the asteroids and planets in the system. Again, why take unnecessary baggage along if it is only going to slow you down? While such a ship would still dwarf anything we have ever built in space, it could be made to be a fraction of the size of the ships you are describing. If so, we could speed up these missions a lot and colonize the stars much much faster.

[@thebenevolentsun6575]

Amazing video isaac

[@stormbringermornblade8811]

We really have to make some of this happen at a much faster rate . Excellent as allway's

[@everythingisfine9988]

Happy Arthursday everyone!!!

[@complex314i]

I really like that your rocket equation chart, in addition to integer and a couple rational ratios, has ratios of e and e^2. However, I would have to take off 1 point if I was grading the chart. e is about 2.718281828 The chart lists 2.71 for e. 2.71 is e truncated to the hundredths place. Correctly rounding e to the nearest hundredths place is 2.72

[@LukeSeed]

Wouldn't you send drones ahead at MUCH faster speeds to auto-manufacture Stelasers and use those to slow down the ships? Seems like a better way.

[@sakesama1]

Isaac I LOVE this Video and your Positive attitude in moving forward ! I am still wishing for Star Trek !

[@UFBMusic]

You are 'R'ing like a regular Blackbeard! Well done dude!

[@EMBer3000]

A breeding TWR would probably be better than an rtg. You simply load them with non fissile heavy elements at the start of the journey and activate them in sequence as needed for a very stable and predictable power source. Since non fissile uranium is very stable they wouldn't degrade with time either. Use the spent ones as particle shielding in front of the craft for dual use. The unused ones can be stored behind the ship in the mass shadow for shielding from relativistic neutrons that might start the breeding process early.

[@mitsospapas3306]

Thank you Thank you Thank you Thank you Thank you Isaac

[@owenbelezos8369]

a stellaser would probably be more likely retro reflectors that bounce directly back at the other mirror instead just two mirrors. since light doesn't reflect on a mirror at 180 degrees but 90, watch technology connections video on retro reflectors.

[@fermibubbles9375]

video of the xenon ion thruster is mental

[@alexandersullivan4313]

Can't wait for "Exporting Earth"

[@sssssnake222]

Here's a cool idea for you, we can use any sun as a transmitter, by simply blocking a certain percentage of the light that is sent back to Earth

[@adamboots1]

Exodus Fleet totally sounds like a high school metal band! 🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼

[@aikendrum1518]

Tethers could be used for course correction. Oscillating Tension between multiple craft would create a controllable oscillationary orbit.

[@aikendrum1518]

I mean for obstacle collision avoidance

[@londonspade5896]

'Aurora' by Kim Stanley Robinson is a great book about interstellar colonisation using generation ships if anyone is interested!

[@ivan0e281]

Arthursday! seems interesting. lets watch.

[@cyberdelicxp9125]

Arthur is my only source of optimism.

[@ChrisBrengel]

I am constantly amazed at how big IA thinks! If brute force isn't working...you aren't using enough of it If your mind isn't blown...think bigger!

[@AnakinSkyobiliviator]

Hey, Isaac and others who are interested, I had this thought sometime ago that I thought would be nice to share: so for colony ships, I keep seeing the use of spin gravity to provide a section of a ship with gravity. While that is fine, I can see it possibly leading to some mechanical problems. So instead, why not provide gravity throughout the ship without that potential problem? I propose the ship take the accelerate-to-halfpoint-and-decelerate-for-the-rest procedure and do so at 1 g through whatever means presented. With this acceleration, the floors can be stacked "vertically" in relation to the ship's horizontal profile, allowing you to be on the "floor" during acceleration phase and on the "ceiling" in the deceleration phase. While this might cause problems for things that are sensitive on gravity orientation, like hydroponic farms, maybe those suite can be gyrostabilized when the time for the rotation comes, far easier to manage than a constantly spinning giant rig in the middle of the vessel.

[@AndDiracisHisProphet]

now you just have to propose a mechanism which easily provides 1g of acceleration for an extended period of time.

[@AnakinSkyobiliviator]

But to provide rotation to kilometer-wide ring and the limited surface area in which you can walk on and that requires even more power the more surface area you want to add? The combined surface area of the decks could probably meet that and with a smaller profile.

[@AndDiracisHisProphet]

you only have to provide the energy once

[@AnakinSkyobiliviator]

Mechanical friction will slow it down over time

[@AndDiracisHisProphet]

in space?