Space Elevators & Orbital Tethers
ฝัง
- เผยแพร่เมื่อ 28 มิ.ย. 2024
- Space Elevators are a popular piece of developing technology designed to lift people and cargo into space at a fraction of normal launch costs. We will look at technology as well as many of the misconceptions about Space Elevators which have emerged.
"The physics of the space elevator", P. K. Aravind:
pdfs.semanticscholar.org/d402...
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Cover Art by Jakub Grygier: www.artstation.com/artist/jak... - วิทยาศาสตร์และเทคโนโลยี
*****READ BEFORE COMMENTING*****
To save some time, with so many new viewers, a quick FAQ for this episode:
1: It is speech impediment not an accent, that's what Elmer Fudd was saying 40 seconds into the episode, and I have heard every joke about it many times :)
2. All music used in all episode is listed in order at the end of each episode.
3. Wait till the end of the video to make comments, many things are answered and much embarrassment is saved that way.
4. Many of the more math and engineering intense bits were intentionally bypassed, see the paper by Aravind in the video description first.
5. Read through the comments, many questions are already covered and after answering the same thing 3 or 4 times it gets a bit tiring.
6. I'm not sure why, but the episode has attracted a lot of Electric Universe & Flat Earth proponents, please just leave them be, don't argue with them, or anyone mocking the impediment, I've got thick skin.
Isaac Arthur like the accent! I kind of have the same
You explain stuff excellent. Couldn't it be a way to collect space derbies ?
after the 3rd video , you dont notice the speech thing
Hi Isacc, My concern that I was wanting you to adress is how space junk would be dealt with. I can imagine a single piece of space junk damaging or destroying one of these tethers.
We'll cover it in the near future, not sure which episode yet.
"It's the the risk of homicidal insanity from sharing the trip with others for hours while listening to elevator music." is worth my LIKE for the video already.
what about airplanes? people don't go insane in airplanes
@@Harrysreptarium Dude.. its a joke..
@@Harrysreptarium - Some do... or at least some of the ones I've been near on a plane are clearly not sane by the time you're at cruising altitude. :D
More like days or weeks. If the elevator travels at 100 kph it would take 350 hours to reach the orbital platform.
Who is this dude? Other than a genius? Like, what planet and species? He's too smart and interesting and funny and real to be a human. I'm a little suspicious, over here. Hmm. Maybe he's a "Covert Alien"? Jk but on the real, Isaac Arthur you are a scholar and a gentleman, sir. Thank you. Your vids are a gift to humanity. AMAZING.
If the elevator is shut down for maintenance, will we have to use stairs?
Stairs aren't handicap accessible... we use a giant ramp instead.
Though its more of a giant cannon.
Chris Gaming you could just scale/climb it from the outside.
Yeah, we kinda just blast people into space and hope for the best
Don't mind if I puke over the side of the stairs every 20 floors. All that climbing is very hard on my lungs.
pady No one asked your opinion No one gives a fuck about your opinion
"Elevator out of order, please use the stairs."
Matewiols
Copied
'In case of fire, do not use lift'
@@agalah408 "in case of fire, jump out with a parachute"
@@certifiedpossum8655 Only if you're still within the first 100 kms and even there you'd need a pressure suit. Above that you're going to need a shield for the burn - aloe vera ain't gonna cut it. :D
I learned so much so quickly! I did not know "geostationary" and "geosynchronous" were different things. Thank you for a terrific look at this unheralded technology possibility. The elevator faces many obstacles, foremost among them garnering public support for something that in sound bite fashion sounds clunky or preposterous. That's why your videos are so helpful -- they explain matters to those who wish to understand things in depth.
We need people too keep pushing - but keep China out of it - real / democratic government(s) the principle being the USA (primarily because it's the only one with hostile take over protections in the constitution).
Didn't watch because of 1 simple but major and insurmountable problem...the earth. You cannot attach anything that will have the drag on the planet and it's surface that the spacetard elevator would generate...it will rip the ground ups and much around it. Best case scenario would be only localized damage but in probability it will cause fractures and hairline fractures stemming from the centerpoint and stretching miles causing the crust much damage, earthquakes and other surface issues. If it rips up/fractures or compromises a volcanic "vein" it could cause more untold and unthought of damage. All this stated is major catastrophic damage to the earth and it does not address the impact it would have on the rest of the planet, its forces (hydro/rotation/rotation speed/weather,etc) and its further impact on life. Seems like a self-defeating effort/suicidal endeavor by a few without much consideration for everything else.
Isaac Arthur continually blows my mind! I've never thought of the possibility of being trapped on a space elevator listing to droning house-techno with a bunch of awkward strangers until now.
house-techno?
More like bring-down-the-house techno then, amirite?
Penny Lane Raise the roof? . . . 🤔
I suck at these . . .
Would need to clean like probably all space junk up befor attempting that!
I'd like to be the DJ
Man, I love your shows. Basically, they're more interesting to me than any other channel out there. The amount of hard science you put into your work, the interesting topics and the rate, at which you produce new content - they all are just astounding. Great work!
I'm new to @IsaacArthur and instantly found his presentation and graphics intriguing. Oh, and I subscribed.
I grew up completely trilingual, but with a speech impediment that only showed up in one of the languages I spoke (Spanish, the impediment is ankyloglossia, or being "tongue-tied," and pre-surgery I could not roll my Rs at all; today I can sorta do so with difficulty), and as a consequence I tried at all costs to avoid speaking Spanish because of the unending taunting and bullying I received - not just from other kids, from adults, too … teachers, even! I wish I'd been brave like you, even today I feel myself blush and stammer as the blood starts pounding in my ears any time I speak Spanish, while you just plow ahead with all the confidence (and intelligence - I love your content!) in the world: after the first minute, I no longer even noticed the speech anomaly! I really admire your panache, I know this doesn't address the point of your video, but you must be an inspiration for kids who, like I once did, struggle with self-esteem over an affliction that some people use as license for mockery and cruelty. Kudos to you, you really made my night. 🙂
Imagine sitting on the toilet in a 4g elevator at it's switch point........
Erik J that would make a good video 🤣
I don't think I like the idea of dispensing toilet paper at 4G. Plus, there would be a huge splash when the poo hits the bottom of the bowl.
lmfao!
I assume it would tell you how long till the switch point... it's up to you to figure out if you can go within that time.
@@agalah408 - But wouldn't that same 4G also prevent the splash from reaching your arse? :D
4G elevator has a MASSIVE (see what I did there? :D) impost in terms of energy. While it might seem that, because you're not carrying the fuel it will be more efficient, we have to remember that fossil fuels are used in normal transport because the fuel density is far greater than can be achieved by (say) electricity.
So you've got maybe 100 tonnes of elevator and humans to be lifted, plus the crash couches and life support needed to keep people alive under 4G of acceleration - it may seem an easy thing given crack fighter pilots can hit 9G before they pass out, but most people are neither that fit nor that healthy. Kill a few and the mod will tear the elevator out of the sky.
Plus, 4G is not needed - accelerate at 1G for 30 minutes then turnover at mid-point and decelerate would put you there - unfortunately we're then talking 1 hour of fuel needed ( or 1 hour of massive amounts of electricity) to do it. That level of fuel is expensive.
This chap makes the best videos on TH-cam. Here in the uk we are forced to pay for a BBC TV license, they say its so that they can produce 'quality programming' but these videos prove that quality programming does not need a massive budget..
What has this got do with the BBC?
-$
Just don't pay the license my man. Not like you'll actually miss anything from bbc anyway.
Not paying the license will actually land you in jail where I live. Germany, land of the free!
And the way they're pissing away cash on content that's utterly useless. Or even worse, having to pay for your own state propaganda brain wash cycles.
Paying for a BBC TV license, is another way for the British Government to: A. Make crap loads of money at your expense and : B. To not have to spend, the crap loads of the money that they ripped off you in the 1st place, by not producing these shows themselves.
The solution is actually pretty simple, but we need to combine carbon nanotube technology with the latest in biological gene splicing techniques to create giant 100ft spiders that use nano-webbing. I don't see any issues.
AHAHAHAH genious
sure - and the resources are sucked from the solarwind... it is as thin as the rays..
I knew spider man had a better purpose than fighting crime!
You are simply talking about the material to build it but what about the actual elevator? How fast does it need to travel to get to the top without it being a ridiculous time? Anything over 30 mins is too long for most people. And whats gonna happen when that said elevator needs maintenance? Use stairs? 😂
😱😨
"While listening to elevator music" then plays epic music
Yes!
Looked to me like that Stormtrooper was also enjoying the music. Probably on his way to class, "Blasters Lv2: Aiming & Target Practice"
Brilliant work and animations. Well done!
We currently don't have ANY materials technology that could withstand the weight of a object that extends to space. This work is anything but brilliant
OMG I almost died laughing when Elmer Fudd appeared in the lower left suggesting CC at the exact moment I was wondering what a Space Elevado was. Your self mocking comic genius alone was worth the sub. And the rest of the video was excellent.
You get a like for that opening joke
This highlights the importance of materials engineering. I expect there will be
more advances in this as more research is directed towards space objectives.
Just to think that even the *highest* estimate of building one of these is barely a fraction of what the US spends on our military in a year
Estimate is being very generous.
@@p331083 a lot of things, especially innovate and space related ideas, go *very* over budget
@Robert Karnick
The American Taxpayer spends an *Order of Magnitude* more of Our Tax dollars on Welfare of all kinds than on the Military. The Military actually does a vital service we all benefit from.
Unlike most Welfare Recipients.
Just sayin.
@@Warmaster_7 you're right human beings don't deserve rights
@@evanescentenquirer2684
I have no idea what you're talking about.
Human beings deserve Rights.
I shouldn't have to pay for someone's lifestyle I don't know.
I've only known about this channel for a few days now, but I can already tell that it's the best thing that has ever happened to TH-cam!
These past days have been a marathon through your videos, good job!
Welcome to the channel Lalo! Though I'm always surprised anyone can binge watch me.
I did when I joined the channel a few months ago. I like to listen to your episodes while doing other things.
Your posts have become one of the highlights of my week. Thank you for all the hard work.
Thanks Chris, I really appreciate hearing that!
Lalo lol, I concur, my fist time was special too😄
Agreed!
I didn't even notice your impediment! Watched the video without subtitles, enjoyed it thoroughly, and consider myself to be very lucky to have learned so much from you. Thank you so much for your contributions to TH-cam and I am *so excited* about the quantum computing episode--that is something I know so very little about, but am always so excited to hear more of!
My son has the same speech pattern. He's also smart as heck
Cool
Heck? Isn't that where you go if you don't believe in Gosh?
@@josorr indeedily doodily.
My mom had the theory that those with an "Elmer Fud" speech pattern was a result of parents speaking with "baby talk" to their children. Those i knew that had it always had a younger sibling less than five years their junior. It would imply a longer exposure to that pattern. Of course, if non-American parents don't do "baby talk", then that throws that theory out the window with this guy.
@@michaeldiebold8847 oikly doikly doo neighbor, best to repent to gosh in these tough times
Isaak, your unique speech keeps the video spiced up, your knowledge is vast, your style is fun. Anyone mocking you can see YOU laughing all the way to the bank! Congrats on the success.
Will this work like Gore's promise the north pole would be melted and arizona under ground by 1988 if everyone didn't concede over all money to the United nations
Isaac - I’m actually proud of you simply forging ahead and talking. I remember that until I was about 9 or 10 I had a tough time with “R’s” as well. Anyway, great job and I learned a bunch. Dave in Phoenix Arizona USA
I had the same speech impediment for the longest time. Years of embarrassing speech trainers....ughhhh! Why can't people accept us for who we are! Keep on doing what you're doing brother! Doing awesome!
@@TimothyHuffGuitar Unless you can't raise your tongue to the roof of your mouth then it is NOT a speech impediment, or you wouldn't be able to do 't' and 'd' and also difficulty with 'h' and 'j'. The 'l' sounds needs the end of the tongue up against the pallet and 'pointed' so that the vocalised sound goes around it. If you can stick out your tongue as a slender (not flat, like a dog lapping) then you have all the muscular control necessary, you just need to re-learn the reflex. I know, been there, done it. That said, it never really bothered me, I was just determined to get it. Call me an anowak if you wike, but that's how I am.
@@paulforster6229 What made things difficult for me was something to do with voice to ear sounding. I had hearing issues, though I could hear others fine, I had trouble with hearing my own speech. I couldn't properly sound out "r's" and my voice was monotony.
*OH GOD NOT THE ELEVATOR MUSIC*
*NOOOOOOOOOOOOOOOOOOOO*
*STABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTABSTAB*
I see a remake of the movie Devil in the works, but this time it will be longer than Lawrence of Arabia.
There wd be a fixed penalty fine of $500 for not taking your anti-fart pill before getting in.
Everyone will have headphones on, just like any bus, train, or plane.
And just like an airliner, the guy sitting in the window seat will close the window shade so he can see his phone screen.
@@chippysteve4524 Rather it would be more efficient to have some kind of advanced ventilating system, and/or suction tubes like you would use when peeing in space today.
it would be funny to have an elevator DJ that only plays jazz and every other song repeats.
Fascinating stuff. Always wanted to see someone break down space elevator theory and you’ve certainly done it justice.
Thank you for being so thorough in explaining the concepts and for all your hard work! All the videos I've watched from you have been greatly appreciated!!
@IssacArthur is an absolute gem of a find. A content creator at its finest. Keep up the great work.
Happy arthursday everyone! :D
that is so lovely and loyal
avxbynl piss off you pathetic foolio
So cool man. Thanks for this. As a complete layman, I've often wondered and imagined if something like this could be possible, why we haven't done it, what would be the problems and benefits, etc. I really enjoyed your breakdown.
Before: Space elevators are the greatest thing ever!
After: Sends 10000000000000000000000000000000000000000000000000000000000 emails to NASA to start planning the cosntruction of a space elevator immediately.
Have they answered
Im so glad that I found this chanell. Why there aren't milions of views on every episode?
HA HA!! I love how you cut all trolls off at the knees by acknowledging your speech impediment giving them no ammo. Like many have said, this channel might be the best thing to hit YT since... since... um......"Gungham Style"
I didn't even notice it was an impediment, i was wondering if it was a German accent, my German friends speak English a bit like that. Whatever it is, I can understand everything clearly, great videos
Did you just say "Gungham Style"? What the hell is that?
If you meant "Gangnam Style", you must be mad. It was the catchiest and most annoying song around then, nothing makes it good.
That would be 'Gangnam Style" said with the aforementioned impediment. +rush1er Well played sir, well played.
kripke
I've seen this video so many times and I keep watching whenever it comes up in recommended.
Wow, so in depth. One of the best vids on youtube for actual information. Thanks!!
No CC needed.. I can understand you totally fine my friend.. :-)
saturn0660 me too. Never needed cc.
I think everyone understands him just fine. Some people are just jerks and will jump all over anyone that they can for any reason they can think of. There are lots of insecure people that need to build themselves up this way.
I could understand 98% of what he said, but, I definitely had to enable cc to understand everything he said.
im not a native speaker and i can understand him clearly
I thought that you were quite clear. And that your video was very interesting.
dude... Just wanted to thank you for bringing dreams back into my life...
I just wanted to send along a thanks. I love your vids. This one particularly. I love the detail you go into. Excellent stuff....I'm subscribed! I've just edited this by the way after reading your above comment. Accent/speech impediment? Who honestly cares? What you articulate is abundantly clear, and I for one am most grateful for it.
Awesome info and presentation! I've been following the various alternative space launch/transportation ideas for years, and you bring the ideas to life with a great balance of hope and reality. Thanks!
Ha space elevator music .. 'Fly Me To The Moon' 'Space Oddity' 'Spaceship Superstar'
"Somewhere Out There"
"Spirit in the Sky"
"When You Wish Upon a Star"
"Spirit in the Sky". Not a song I would appreciate when trusting my life to an extremely thin carbon thread. :)
OK good point.
"Love in an Elevator"
Van Halen - 'Jump'
Why not throw in 'Stairway to heaven'?
40 seconds in. After a brief frown, discerning what sounds different, up pops Elmer Fudd. After some laughter I subscribed.
Thank you for making one of the very few sensible and informative YT videos on this subject.
Isaac, you have so much good content in just this 30 minutes that I found myself backtracking several times because you added a point that made me stop and have to think about it. This is terrific. I'm only sorry it took me so long to find you.
Holy crap I'm impressed by your level of research into this. Most people really only get into the proof of concept end of this type of project and demonstrate the mechanical requirements of such a system. However, you brought up practical engineering problems that would have to be solved before anything like this was ever built as well. 10/10 subscribed
I enjoy your narrative voice. It sets you apart as unique, and you are very well-spoken. Great video!
Isaac Arthur,
i Love your Videos from the bottom of my heart ❤️.Could you think about making an Episode about Surgery in Space?
Thank you for the professional and informative video. I am a old man and I fear I will not live long enough to see this and other projects come to fruition.
Best part of the week!
yes it is!
100% agreed. I love listening to this channel as I go to sleep. I always rewatch them afterwards too, that may seem weird but it takes a few attempts for it to sink in haha. (that's totally my problem though, I have a dyslexic brain)
Truly
indeed Qoo
wouldnt you need giant bases on ground to attach the cables, like for bridges? please explain, i really want to know.
Best opening line ever!
Love your videos, Isaac. This one is especially interesting. You make it sound doable, unlike other people have. Thanks.
Good stuff. Great job taking hard to believe and understand engineering concepts into a presentation for the lay person. Kay Rigg, an engineer I worked with at the Army Research Institute for a military contractor in 1992, told me that a vacuum enabled, carbon tube elevator had been designed (not attempted to be built, obviously) about twenty years before I met him. Then 84 years old, he had litterally worked under the most well know engineers and teams of the fifties, sixties, and seventies. He taught chimps how to read and communicate with pictograms, designed mechanical and electronic components of space and military craft, and contributed to sorts of classic "golden age of engineering" accomplishements. By the '80s, he had shifted his engineering foci to computing and networking. Amongst other things he was working on at the time, he was attempting to address data consensus across wide area networks for battlefield data validity, the very problem that Leemon Baird only recently solved with his Hashgraph network consensus protocol. The point of my comment is to illustrate how right you are about the idea being a fairly old one, event the materials early engineers and visionaries imagined would be required and how we are now at the point of being quite able to begin building these solutions.
Ive been watching your videos for hours now and will continue to do so! Your work is amazing, thank you!
Hey Arthur, I just wanted to say that I really appreciate your videos and keep doing what you are doing because your videos are awesome :)
Wow! This one video (+ corresponding article by Aravind) has answered almost all of my questions and concerns about the topic of space elevators, specifically the physics involved.
399K subscribers! So close to Four Hundred Thou!!! Love your channel Issac. Thanks!
Great information. It helped significantly in my research for a novel I'm working on.
I'm very glad to hear that Terry, please make sure to let us know when it gets published!
This is a pretty fascinating documentary. I learned something new today. Thanks for posting this.
Thanks Vincent
I'm amazed by the amount of detail addressed in this video, much more in depth than any other videos I've seen on the topic. All things considered, this definitely sounds like an idea that isn't going to be happening in anyone's lifetime today, and most likely won't ever happen due to all other extenuating circumstances like size, complexity, and dangers around the mechanics and surroundings of building a space elevator. Very interesting and in depth analysis done here though, very well done sir! And thank you for sharing!
Isaac. Your videos are absolutely brilliant. So informative. Keep up the great work!
What about the effects of space debris on the tether at higher altitudes? At geostationary orbit the tether is moving through space at over 11,000 km/h at those speeds even a tiny ice particle is going to impact with enormous force. Carbon nano-tubes may have excellent tensile strength, but would they have comparable strength against such impacts?
Also, how are all these cables going to influence satellites and other objects moving much faster at lower orbits?
P.S. I just discovered your channel recently. Great work! I'm really enjoying the series.
binge watching minecraft playthroughs on a sunday night before school was getting boring, this is much more riveting. I love it
PBS Spacetime and Joe Scott have been pointing me to this channel for some time. Finally, having just watched this, my first episode, I subscribed immediately! Great work- looking forward to digging into your backlog.
Wow... very impressed by the level of research you have put in to this video. Thumbs up!
hehehe gotta "wove" a guy with a good sense of humour and isn't insecure.
is it really that difficult to get rid of a speech impediment?? I had one and got rid of it easily. was I lucky or do I have to take something else into account, i know i had to learn pronunciation in an unorthodox way but maybe that has something to do with it?
DISCLAIMER~ I'm not mocking him, i'm just genuinely curious as someone who previously had the same thing.
ahhh he has a speach impediment.. darn :D ...i am new to his channel and yesterday i asked where he is from cause i am having troubles with his "accent" and not understanding certain words. After watching a couple of videos the problem of not understanding goes away as our brain just compensates for it... but it didnt occur to me that it could be a speach impediment.. Darn.. thats one heck of a impediment lol.. doesnt make me enjoy his videos less though as they are just so interesting.
maybe he weally weally twied
It can be. I had a mumbling and stuttering problem when I was little. Speech therapists had no success helping me at all. I stayed with my great aunt for a week. During that time, she corrected every single mistake I made. Also, when reading, I had to read the sentence perfectly before I could move onto the next one.
From that week I gained the necessary knowledge I needed. I still really have to focus sometimes, even now over 20 years later, in order to be understood, especially when I get nervous, that's when I have the most difficulties.
We MUST biwd a space ewavator to get away from that wascawy wabbit!
Thank you Dr. Arthur C. Clark
Isaac; I actually found your measured speech quite soothing and (although I had to back up frequently to follow all of the concepts & take in all of the information!) I found this super-interesting. I've only just discovered Upward Bound, but I've been fascinated with the Space Elevator concept for several years. With expanding populations & decreasing areas of manufacturing, we need to be much more forward-thinking in terms of not only Space Exploration, but Space *Building* & you really manage to make vast concepts very down to earth. Thank you so much for a great video; I look forward to the others in your Upward Bound Series & will look out for other videos by you.
I watched despite your speech issue, BECAUSE of the Elmer disclaimer - thank you for the explanation, as I might not have finished the awesome video without it - SUBSCRIBED!!
Very nice episode, been waiting for someone to cover this in detail. Any plans on doing an episode related to the Hyperloop for in Earth travel or possibly all the possible uses that Graphene can have? Those 2 are some of the biggest upcoming technologies I am looking forward to.
+1 for hyperloop.
I'm tired of seeing one side of the media make bold claims about it that have yet to be proven, while on the other side we have youtubers like thunderfoot loudly proclaiming "hyperloop crashes and BURNS!". Would be great to have Isaac Arthur bring a properly informed, objective opinion on it.
Issac we already have found something much stronger than Carbon Nano tubes. Diamond Nano Threads! According to the few papers on the matterial they are 100 times stronger than carbon nano tubes.
DNT shows a lot of promise but they still haven't made long segments of it yet, CNT is up to a meter last I'd heard, but yes they are a interesting development
Isaac Arthur is that the reason you didn't touch on them. I was just curious since other channels have before.
The Emissary of the Sun How are they structurally different?
They have a tetrahedral core of carbon surrounded by hydrogen. Basically diamond strings only a few atoms thick. The reason they are so cool is that they have a structure we have never seen before.
When carbon nano tubes were discovered everyone was screaming that we'll be making space elevators next week. I suspect neither will come to any production level with cost effectiveness for a century at least. So don't hold your breath! Just like spider silk mass produced by genetically enhanced goats, it always falls through. :(
I'm in love of your pronounciation of elevators, sounds like some sick spaceship when you say it :) Keep ut the great work man!
I love all your videos! I could spend all day watching them.
Your intro jokes are definitely improving ;)
:) Though that one was unoriginal, one of my mods from the FB group, Matt, suggested I do an elevator music pun.
Isaac Arthur Ahhh, I must've missed that one, I'm never on FB anymore. Besides, good execution of something not one's own is still worthwhile. Or so I tell myself when playing music I could just listen to a recording of instead.
Isaac Arthur Speaking of which, it helps that your voice ends right on the first beat of the intro music. Gives the whole thing slick panache.
Yeah the timing is tricky especially with the graphics, and I'm still getting used to doing the intro one-liners.
Happy Arthursday! This future can't come soon enough haha. Isaac Arthur for president 2020.
I don't know where he stands on health care, immigration, military spending, etc. etc. etc., but I can guess this much: he can be convinced by a reasonable argument, and by facts.
If the facts say that _Ideologically Satisfying Plan A_ won't work, then President Arthur wouldn't push it, whether or not it comes from his favorite political party.
Whichever party that may be.
I think one President Arthur was enough, anyway nobody wants me writing laws. A few years back when I was working on our County's Charter and got stuck being the one doing all the writing and editing I'd send out versions to steering committee for review and became so convinced they weren't even reading them that I stuck in an article banning witchcraft inside the county. It's an old trick I'd learned from doing reports in the military, add in something nuts to see if anyone catches it... and no one did.
I was so sure I'd get back at least one snarky comment that I didn't leave myself a note to remove it and it very nearly ended up on the ballot that way. But the basic working notion is if I ever got stuck in a legislative or executive position we'd end up with a ton of weird laws banning stuff like clowns on Sundays or making the wearing of polyester suits punishable by flogging.
Isaac you sound like exactly the person we'd want writing the laws. You only need a handful of these to get through and all of a sudden people would actually start paying attention. :)
I loved this video and just subscribed for more! Thank you, Isaac!
This is awesome!!! I love that you explained it so that I can really understand. Thank you.
I have to say
this new intro music is fucking LIT.
Sergey Cheremisinov? Yeah he does some great stuff, I used this piece once in rotating habitats way back and was rewatching that and a couple others in prep to make the series, and it really stuck out to me as perfect intro music.
freemusicarchive.org/music/Sergey_Cheremisinov/
Isaac Arthur;
ah, for some reason I assumed it was made by a fan and you found a good place to put it
No not this one, one of the ones in the middle is, so is the intro for the alien civs series.
Steal my Sunshine?
good times :)
I just came across this and watched it over two evenings, outstanding! Do unto others as we would like them to treat us. People who belittle others over something that cannot be changed are just very small minded people. We all have quirks of character, personality, looks, mannerisms, etc. I had no trouble understanding you. All your information and explanations were very interesting. I remember attending a Sci-Fi writer's convention panel discussing Space Elevators several years ago. Really intriguing possibilities! One worry I would have is a (hopefully) unintentional cable or ribbon strike by an airplane, but I imagine there would be published Air Traffic Control no fly zones around these locations. I LIKED this and will watch more of your videos. Thank you Issac!
Probably my favorite intro music and visuals thus far!
So I found this video off of a link in a vsauce video and I just checked the home page of this channel and boy Think I found my dream youtuber
One major problem I do not see discussed with space elevators is that they pretty much preclude passively orbiting satellites at altitudes below the maximum length of the tether. This will require that either near Earth space be swept clean and kept clean or that orbiting satellites be required to maneuver to avoid the tethers. I know there have been proposals to maneuver the tethers, but, given the sheer number of objects (both useful and junk) currently in orbit, it would require a *lot* of dancing by the tethers and would seem to be impractical.
Avoiding space-junk is already doable. You only need to notch the cables a few meters when avoiding stuff. It is not that much different from how current satellites avoid collisions. Also, having geosynchronous tether hanging in the sky (allowing you to hang a few tons of equipment on it at arbitrary hight) may render the need for most satellites obsolete.
Cheap transport into orbit might change the entire satellite game. Refueling and repair becomes much more economical as well as cheap disposable satellites.
Excellent point. The space junk problem alone pretty much rules out a space elevator.
Nevertheless a huge amount of people are going to make a great deal of money working on projects for this thing. Hopefully some of the technology developed will have practical uses elsewhere.
Our culture consistently comes up with very half-assed ill thought out "solutions and then spends an astounding amount of effort working on things at best wildly and inherently impractical and at worst with devastating effects.
The core problem appears to be putting complete idiots in charge of choosing the projects and directions (nepotism = GWB et al, Trump family, etc) and the people with genuine intelligence and actual ability to do critical thinking stuck trying to rescue projects doomed from the start.
When the basic approach is profoundly flawed, even the best minds aren't going to be able to make much of it, The same group of people that have made such a horrendous mess of everything with their idiotic plans are the ones choosing what "solutions" to use for the problems they themselves created.
If we cannot make Planet Earth self-sustaining, we cannot possibly live long enough to colonize space. But Trump is shutting down the EPA and denies global warming.
The house is on fire but everyone is busy planning the remodeling project.
Jim Barron: Yes, small cables an inch or so wide will fill up space until there's no room left. And shipping lanes will fill the ocean.
And you guys can't help but think about trump with every thought. I can tell you are a popsci disciple. I have as much use for you as I do for one of those people who want solar roads.
Every sentence you wrote could have a book written about why it's nonsense. In fact, most of these books are written.
And if you are worried about shitty politicians and committees continuing to screw everything up, you would be lobbying for a free market.
Course, we could restrict carbon emissions and continue the reduction of CO2. Course if CO2 kept dropping at previous rates for another couple million years, plant life would die. As it stands, biomass is growing because we are providing carbon. Most of the planet's carbon has been locked up in limestone. When there's low CO2 plants must respirate much more air to get its CO2, which means it loses much more water through all the additional stomas. More CO2, less water usage, more drought protection, no GMO needed.
If humans didn't come around, the planet would be doomed and all life would die. The earth has been in the middle of a great die off. We can either stop it and fulfill our role, or do nothing. Nature isn't as stupid as you think. Life is about balance. We are part of nature, not some magical alien that doesn't belong.
Jim Barron Obama is the one who defunded NASA broski. And nepotism and graft always exists in government contracting, it doesnt matter which party. Thats just the nature of government contracts. Obama and Clinton did plenty of this too, Solyndra springs to mind. Ive yet to see any contracts handed out in the Trump era that went to companies who couldn't fulfill the contract but merely for the purpose of lining that company's pockets with taxpayer dollars, as was the case with Solyndra.
Excellent explanation and very well presented. Thank you very much.
I'd really like a compilation of all the intro's one after another. This one was perfect
It might become a conductor as it passes through eatths magnet field?
There was a satellite tether experiment conducted by NASA. The tether liquefied on one end when the tether length got to about a mile... and this was *horizontal* to the Earth's magnetospheric layers. If that tether had been deployed vertically there's no way it would have reached that mile.
So my thinking is--even if they were to be able to create these elevator tethers of a superconductive material that wouldn't melt from the giga-amps of power coming down from the solar wind and outer layers of Earth's shielding electromagnetic double-layer, it would create a new problem of inducing this huge amount of power directly down into the Earth's telluric current layers. This might have the unfortunate effect of creating new 'magnetic poles', disrupting global weather patterns and oceanic currents, and the-Universe-knows-what-else.
The real breakthrough is going to be when we realize that what we need is the ability to change the electrical potential of the object is in question, so that it becomes electromagnetically repulsive to the Earth's magnetic field, and then it will be able to just shoot right off the planet. Of course, this will require precision control of the EM potential of the object/vehicle in question. Not an insurmountable problem, but one I'm thinking no one has really looking into yet.
The Universe is electrical, and real progress will start to begin when we start tailoring our scientific research into this concept.
Peace all.
Strange as it might seem at first, the conductive-propulsion effect is real, it also allows electrical and therefore kinetic energy to be manipulated by the effect, and that allows changes of orbit without propellants. The details are problematic though. More work is needed on that.
And while you're at it check out the 'flux-tube' at Jupiter, work out the electrical/kinetic energy going on with that, its quite something.
Ah, no. It wont become a conductor as it passes through the Earth's field. It might intrinsically BE a conductor regardless of the Earth's field, and then it would develop a potential voltage difference at various points due to the 'faraday' effect as it passes through the field. It would be possible to make use of this by somehow creating a return path and a current would then flow. just sayin.
Gross concept error. The orbital elevator cable would be spinning with the Earth and its magnetic field, therefore no relative motion between the two. Therefore no conduction would occur.
@@warren286 I thought so at first, but check out the faraday disc effect
en.wikipedia.org/wiki/Homopolar_generator
It is a peculiarity that it still works regardless that the 'earth' is rotating or not.
It is counter intuitive, but real. even if the magnets are fixed on the disc and rotate with it, the effect remains.
And, sorry to nit-pick, but that's 'induction' not conduction.
Hexagonal Carbon Nanotubes. We work out the kinks in carbon nanotube production and build the space elevators out of that. Stronger than graphene and extremely lightweight. Hexagons are very strong under compression as well.
I now see that someone has already mentioned that.
Lex Benjamin
We should also consider maybe embedding metal ions inside the Carbon nano tubes as well to electro magnetically couple the tether for furtherstrength as the tether will also undoubtedly induce a large electric charge from traveling through the various levels of the atmosphere and magnetic field, use it to it's advantage.
Obliviously Aware Would the metal ions be used to generate electricity, to dissipate the electromagnetic charge, or both?
Lex Benjamin
With nano manufacturing we could use it to simultaneously dissipate, distribute, and integrate capacitance into the cable at the molecular level, adding further strength if done right.
Remember opposite charges attract, use it in some manner as electro magnetism is the strongest of forces and distribution of tension could be accomplished in more than one way.
Because of the way the cables will be used, they will create electrical energy, regardless of your intent to do so.
+Lex Benjamin +Obliviously Aware
That's a bloody crazy and brilliant idea. That would mean it is, theoretically, possible to make a superstrong superlong semiconductor; it could not only be structural, but be a power-and-data umbilical cord for the terminus station.
Fascinating! Why have I not heard of you before now? Very, very, well done! Liked and subscribed, and cant wait to see more! Thank you.
these are exactly what ive been looking for !
Thank you Isaac
We could make space elevator not today but in 100-200 years from now,
along with tension in every nations in this earth.
My Idea on Space Elevator
-The Space Elevator could also harness solar energy thus no longer using the fossil fuels.
-Can be use to transport to other side of Earth and to Space.
-Could be also used as a settlement for Humans.
better to build a mars base but we need a moon base first sooo
We need one badly to smell space air
Im glad I found your channel bro. I really enjoy this content.
hahaha!
the opening sentence of this video was perfect!! oh man, there's a reason I love this channel. several, actually.
keep it up!!
I wouldn't take it as I dont see how they are going to resolve the space debris issue.
Japan already has a viable solution - satellite with solar cell powered laser gun zapping all trash around, laser boiling material will create small thrust that will eventually (after days or months) deorbit everything unnecessary - from lost screws to the entire dead satellites. The only real problem with this idea is a fact that it means putting a Weapon in space and so far it is forbidden by international treaties. But if it will become really necessary Im sure big guys will agree to do that.
@@randomnickify That is indeed a viable solution. Problem is, humanity can be quite immature from time to time. But maybe the UN can make an exception for utilitarian lasers if they are commissioned and maintained by the UN itself or direct contractor and by consensus of all treaty signers.
to be fair... a laser like that wouldn't qualify as a Orbital Death Ray, it neither needs to be THAT powerful, just enough to evaporate hand sized chunk of steel. or have that much of a range. to hit us down here on earth it would still need to go thru atmosphere and there is nothing that hate lasers more than atmosphere
Hi Isaac, thanks again for a very informative video. Space elevators have fascinated me since I first heard about them. However I have always been dubious as to how we'd ever build one. You explained a lot of things but I have to take issue with you glossing over production of carbon nanotubes. Despite carbon nanotubes being discovered in the 1950s we can still barely manufacture them a few inches long. There does not appear to be a technique to build them anywhere near as long as we'd need them for making space elevators.
Real efforts to make them longer are still pretty new, but to be honest I don't expect us to ever be able to make a single one even a kilometer long, we'll have to settle for something a bit weaker with all the flaws implied in taking tons of shorter ones and merging them. I hope to be proven wrong.
For any deed that seems un-doable, we must only take a queue from history:
1.) Manipulate Kennedy/Trump into believing that we're going to look stupid if USSR/China gets the moon-landing/elevator before us.
2.) That scale of rocket/tether is literally unfathomable.
3.) Hire Nazi scientists.
4.) Bathe in governmental funding.
5.) ???????
6.) Space Elevator
Isaac Arthur OK, fact is, if you build one, you build one thousand at the equator and have a completed ring of space industry linked together in a solid outer space equator extention platform. A ring.
We have no method of making them longer here, on the surface of the Earth. A manufacturing facility in zero g would be able to pull a lot of tricks that we simply can't do here.
like a Saturn ring you can live in
Thank you for the content my friend!
this is my favorite intro to any of your videos :D.. makes me laugh every time
Isaac
While listening to explanations of things that I do not have prior knowlege of, sometimes the narrators voice, tone, presentation or other factors make me loose interest in a subject that I would like to know more about. I didn't pay attention really and at first I assumed you had an accent that I was not familiar with. Then I noticed certain words and how you pronounced them, I then realized the speech impediment. As I continued to watch the video and listen I found your voice incredible in its ability to keep me on point listening to my education of this subject.
I thoroughly enjoyed the materials and your knowledge of the material as well as your rhythmic speech.
I liked this video and subscribed as I am curious and excited to hear and learn more.
Bravo.
I will definitely keep watching.
Great life to you
Dief
@13:22 wouldn't an artificial-spin gravity space station not be able to keep its axis perpendicular to the space elevator column due to gyroscopic forces attempting to keep the rotating station in one plane while earth's rotation would always be shifting its axis?
You could add a second counter rotating section the the station
Nope, wont work. And. jebes909090, Nope, that wont work either, gyroscopic forces/effect do NOT work that way. Try it with a model then get back to the idea.
I can understand you very clearly Isaac! Interesting video.
I love your Channel. I'm already an addict of curious Droid which directed me to you last week when talking about colonizing Mars. Now I could find myself getting addicted to your Channel and the speech impediment just makes it less monotonous as you work out the nuts and bolts which is part of what I need and want to know. I've often thought about if this was possible. Not seeing anything prior I thought I was just fantasizing. But apparently others have given great thought to it and you have took it to the nth degree. Fantastic video Bravo my friend!
What happens when the tether becomes a lightning rod conducting charge from ionosphere to ground?
free energy
oh, and the static charge build up too?
"free energy" could be fun, as long as it's not TOO free. Enough current could turn matter into plasma, and then it's entirely too "free". The hypersonic expansion capacity of plasma could make for quite a shockwave/blast radius. Like thunder, but "Big"
@@kathrynck Now how to weaponize this, for a boardgame...
Isaac, can I ask what do you do for a living? You seem so smart and well educated and I'm just curious what field you ended up in. Also have you seen The Expanse? It's really good and they try to use real science most of the time. Anyway thanks for the videos.
I thought he a physicist?
He once said he's a public office clerk.
I've seen this question before. I'm thinking if Wikipedia can host a page on Arthur Isaac, a Welsh amateur football (i.e. soccer) inside forward who played for Brentford in 1923, then someone with over 44K followers and 4M somethings (views?) should qualify for a page.
He said before he was in the Army and stationed in Ohio. Right now he is a politician of some sort IIRC, which could be just a public office clerk like Ixian Technocrat said.
there has never been a public office clerk who did a lick of science that was of any importance.
...Come again? He was? He did? and the photoelectric effect you say? oh, Nevermind.
Excellent video. Thank you for sharing.
Great video Issac!