"...,at least until we discover how to walk at right angles to reality." Superbly original way of putting that notion forth.

@MarkusAldawn

2 жыл бұрын

I believe "perpendicular to reality" was a line from Hitchhiker's Guide. Potentially intentional.

@ekkekrosing8454

Жыл бұрын

Had an interesting idea for a scifi novel on how to access that. How about streching space out alot and hoping that some fluctuation makes wave like things that ate right angle dimensioon

This episode has a retro Isaac Arthur feel. Like I've travelled a few years back in time.

@liusam651

2 жыл бұрын

Maybe it’s the audiob

@isaacarthurSFIA

2 жыл бұрын

Semi-intentional, the FTL series is one of our first and this is technically episode #6 of it, and I used some of the same visuals and music themes, though mostly without thinking about it :)

@askani21

2 жыл бұрын

Or maybe it was sent from the past...!

@andrewgraziani4331

2 жыл бұрын

You sure you haven't?

@petermcconnell9622

2 жыл бұрын

I prefer the old IA videos more of a storyteller feel to them

I'm a primary school teacher in the Netherlands and currently teach ~8 yr olds. I've brought my pc to run SpaceEngine a couple times and show them around. They come with a million questions and even after answering them for over an hour, they want more. It's thanks to you that I have a lot to share as well. Thank you so much for this!

@yoshikhurazi1769

2 жыл бұрын

You're an awesome teacher. I knew I would have killed to have something like SpaceEngine to see back in the day

A fucking big rain hit our camp so nobody wants to leave the barrack, even the guys who are already on leave right now, what a good time for some SFIA!

@isaacarthurSFIA

2 жыл бұрын

Nothing worse than marching in the rain :)

@SpecialEDy

2 жыл бұрын

The first rule of Warfare: Stay dry and always carry a towel.

@EgoEroTergum

2 жыл бұрын

@@SpecialEDy First Rule of Hitchhiking: Always know where your towel is.

@Heritagius

2 жыл бұрын

@@SpecialEDy First rule of Commissioned Officer Warfare: don't ever go out, watch other people march, have a Man to carry your towel in case you spill your tea.

@Lawofimprobability

2 жыл бұрын

@@isaacarthurSFIA Au contraire! Nothing worse than setting up your tent in the rain.

Watching this with my 2 and 4 year old sons. They love watching your videos, the visuals are captivating for them and they ask me lots of questions about what you’re talking about. Thanks Isaac…I hope we can all maintain our sense of wonder like my kids have right now.

@ohmatron8360

2 жыл бұрын

I bet your 2 and 4 year olds would actually prefer Peppa Pig !

@roadkillanonymous4807

2 жыл бұрын

@@ohmatron8360 haha nope. They’re familiar with that show. They ask to see “space videos”

@ohmatron8360

2 жыл бұрын

@@roadkillanonymous4807 I was only pulling your leg...I think it's great you open your children's minds with vids like this.

@tite93

2 жыл бұрын

Isn't the vocabulary a bit too much for children? Anyway, it's great if they enjoy it!

@roadkillanonymous4807

2 жыл бұрын

@@tite93 of course it is. They like the pictures of space and ask me what he’s talking about. I do my best to explain it to them, no doubt they don’t really get it yet.

This is exactly the type of show that made me fall in love back when I found this program!

An absolutely wonderful channel with such astoundingly mind stimulating content. Thank you Issac, keep up the great work.

The edge of the universe is where we can find Isaac's video about atmosphere mining

@road2apples

2 жыл бұрын

♥✞♥Jesus Christ is Lord. Hallelujah We are God's creations. He spent time and energy making us each unique and are all beautiful in His eyes. Choose what to do with your body wisely, because the Lord expended effort on it. Do not throw it away. Cherish the beautiful gifts that you have been given. Thanks be to God.♥✞♥✞♥

This reminds me of a throw away sentence in Arthur C Clarke's novel "Against the Fall of Night" where its casually mentioned that the ancients had taken a starship and raced around the rim of the universe in a single day.

@azmanabdula

2 жыл бұрын

Everyone only went to the universe to see them him the edge

Most physicists: It can't be explained in words, you need to know the math. Isaac Arthur: Grab a snack and a drink; we're talking physics.

So excited for this. I remember being 4 years old, and trying to wrestle with the concept of “the end of space”. How does it end? A wall? Then what’s on the other side. I think that kickstarted my fascination with space

@gigastrike2

2 жыл бұрын

My current running possibilities are that either you hit a wall, you leave the universe and enter nothing, or it turns you like the inside of a black hole would.

@N0TYALC

2 жыл бұрын

@@gigastrike2 It’s still so incomprehensible to me. There’s no theory that doesn’t sound utterly insane.

@krumuvecis

2 жыл бұрын

It could also be round, just in 4th dimension. Similarly like on Earth - surface seems 2-dimensionally flat, but there is no wall at the horizon - it just keeps on going until you go around and reach your starting point

@lancerkind4055

2 жыл бұрын

@@krumuvecis like a game of asteroids.

@diouranke

2 жыл бұрын

Pretty impressive for 4

Wow! Early enough to see the edge of the universe from here! Cheers Isaac! Another great topic

@road2apples

2 жыл бұрын

♥✞♥Jesus Christ is Lord. Hallelujah We are God's creations. He spent time and energy making us each unique and are all beautiful in His eyes. Choose what to do with your body wisely, because the Lord expended effort on it. Do not throw it away. Cherish the beautiful gifts that you have been given. Thanks be to God.♥✞♥✞♥

13:24 I, for one, welcome our new hyper dimensional cat overlords

@johannageisel5390

2 жыл бұрын

You know all those yet unexplained phenomena in the universe? These are all caused by the Hyperkitten pawing at our universe while playing with it.

The Edge of the Universe has a wall, and on the wall there is a legend, it reads: *SLOW, Spaced Out Hippies Ahead!*

KZread - There's a new Isaac Arthur video. Me - Immediately stop what I'm doing to watch

@shadsalah3346

2 жыл бұрын

your channel is great too.

@HistoryTime

2 жыл бұрын

Fun fact - Isaac was a massive inspiration for me to start my own channel

@shadsalah3346

2 жыл бұрын

@@HistoryTime great to hear that. always nice to see an domino effect of great stuff.

@AboveEmAllProduction

2 жыл бұрын

Sad to hear about your surgery patient that died because he posted a new vid 😢

We all know there's a brick wall with a tourist view finder at the edge of the universe where you can look at the other side & find a universe where everyone wears cowboy clothes & hats. That's what Futurama taught me at least.

"We're not bothered by kicking the can down the road in science so long as the can arrives where it's supposed to be, which for a lot of theories is apparently a recycling center." 🤣🤣 And lots of episodes in September. See you Sunday!

2:25 .......that deep sigh..... yeah.... that is pretty much how I feel all the time. The best I have ever heard it put into words is Bill Hicks.... "...bear with me while I plaster on a fake smile and plough through this shit one more time."

There is something different about the vibe of this video. There's a strange outburst of confidence and witty... humor? humor-adjacent thing that isn't present in the older ones. Especially at the beginning I like this video

That's a lot of talk about edging. Interesting talk as always, Isaac!

@Sauce....

2 жыл бұрын

lmfao

@agalah408

2 жыл бұрын

His videos are always edgy

@AboveEmAllProduction

2 жыл бұрын

I'm edging as I'm reading your comment. And now I have arrived all over the place.

There are 3 ways to watch SFIA. 1: With 100% attention, to learn something and to get thinking about the universe and our place in it. 2: As background noise, so one doesn't feel alone. 3: As relaxing podcast to fall asleep. All 3 of them are wonderful and I enjoy every second of it. Your videos are running around 4 - 6 hours on my screens every day and I love it.

I find it humbling that we laugh at people in the past who thought they would fall off the edge of the world, and yet here we are wondering the same kinds of questions.

@surfside75

2 жыл бұрын

Gold.

The last time I was this early, the temperature of the universe was 10 billion Kelvins

Traveling to an older, bigger, colder universe might be an interesting plot point for a sci-fi story beyond just hiding there the way you briefly mention. If you can travel back and forth between universes, you can look for evidence of dead mega-structures and such in the older universe, return to your universe or an even younger one to travel quickly to those locations, and then search for advanced technology that there literally hasn't been enough time for anyone to have developed yet in your own universe. It could make for an interesting take on the "future explorers find ancient ruins with super-powerful alien artifacts" trope.

@road2apples

2 жыл бұрын

♥✞♥Jesus Christ is Lord. Hallelujah We are God's creations. He spent time and energy making us each unique and are all beautiful in His eyes. Choose what to do with your body wisely, because the Lord expended effort on it. Do not throw it away. Cherish the beautiful gifts that you have been given. Thanks be to God.♥✞♥✞♥

We will hopefully never reach the end of your videos! Thanks for your hard work!

@road2apples

2 жыл бұрын

♥✞♥Jesus Christ is Lord. Hallelujah We are God's creations. He spent time and energy making us each unique and are all beautiful in His eyes. Choose what to do with your body wisely, because the Lord expended effort on it. Do not throw it away. Cherish the beautiful gifts that you have been given. Thanks be to God.♥✞♥✞♥

I have to wonder sometimes if we don't have the whole idea wrong? Kind of like a puzzle where the pieces mostly fit, but the picture makes no sense.

@AreEia

2 жыл бұрын

Indeed. First off, there might be some event or interaction, that has passed by our possbility to ever detect it. Like how in billions of years, there wil only be "island galaxies" left, and whatever intelligence arises then, will not be able to find all the pieces of the puzzle so to speak. Our minds have certainly not evolved to understand the intricasies of the universe, and I dont mean intelligence here, but rather how we are experiencing and viewing the world thorugh the lense of a specific homonid species. With all that entails concerning limited capabilities, brain unable to think in a way that could give us an understanding, our conecpts of sensors and measuring being limited, etc. And ofc the most important issue; "is math discovered or created?". Because there is a possibility that math and our understanding of the unvierse is just a really well functioning framwork/lense to view the world though, without actually being an intrinsic part of the universe as our current understanding/hope is. Personally I have hope that we might someday be able to understand what this existence really is, if it even is a "concept"/"occuring event" that CAN be understood. But my best guess is that we as a species will have become something entirely different looong before we will ever get close to this point. In the meantime I love learning about this stuff, and hope us strange little apes can argue, discuss and intensely try to figure out what this all really is about :) For that part about math, Roger Penrose has some interesting videos and interviews about this subject, if you did not know about it or want to check it out :)

Nothing like waking up to a new video by Isaac!👍

I'm relatively new to this channel but id like to say your content is really awesome

Can you revisit active support structures again and go into more details about how they can be achieved? Your original video is one of the only few web sources on this. And as active support appears to be the basis for all mega structures and major space construction concepts I feel like this deserves a remake. Thank you for all you do. Please upvote so Isaac reads this! Ty all!

@atk05003

2 жыл бұрын

You might find more sources by searching the names "space fountain" and "orbital ring". "Active support structure" might be too vague to get good search results. en.m.wikipedia.org/wiki/Space_fountain en.m.wikipedia.org/wiki/Orbital_ring

love the futurology but I also love just learning about space and I think we should have more of thee sprinkled in.. also literally can never have enough fermi paradox vids!

@road2apples

2 жыл бұрын

♥✞♥Jesus Christ is Lord. Hallelujah We are God's creations. He spent time and energy making us each unique and are all beautiful in His eyes. Choose what to do with your body wisely, because the Lord expended effort on it. Do not throw it away. Cherish the beautiful gifts that you have been given. Thanks be to God.♥✞♥✞♥

This one was an absolute mindbender. Thanks for keeping me up at night Isaac!

Liked the tone and cadence with this one. Felt more personal, like listening to a friend

SUCH a good episode! Thanks, Isaac.

great video and amazing upcoming ones, wow! thorium, human machine teaming, stealth spaceships, very delicious topics :D

"Compactified" is now my new favorite word. Great stuff as always, Isaac.

@JohnDlugosz

2 жыл бұрын

You should look it up to grasp its real meaning, in mathematics first, and then how physics uses it. His usage isn't exactly _wrong_ but it gives the wrong idea of what the term is actually referring to.

@randomuser778

2 жыл бұрын

@@JohnDlugosz Not sure what you're on about, mate. At NO POINT did I say the usage was wrong, nor did I say I did not know its meaning.

i havnt watched your videos in some time and i regret it cause your videos are always so gooood

Origins are such difficulties. Each personal universe -- the universe as seen from a given point -- expands in radius at 1 light-second/second. Expansion is in spacetime.

love this episode so much

Seeing more often less than 30min vids on SFIA is super worrying for me.

@surfside75

2 жыл бұрын

10-20min videos on KZread will become the normal.

Great to see the Matt O'Dowd shoutout at the end. PBS Spacetime is up there with 3blue1brown and Michael Penn as my favorite science content creators (the latter two being math oriented, PBS physics)

Another great concept development video in science, from a brilliant content creator

I have always been fascinated by the notion of a universe having multiple temporal dimensions. Unfortunately, I have only seen multiple dimensions of time discussed a handful of times. Of particular annoyance is that all of the times any detail is given, it is actually a multi-component formulation of 1D time, not true multidimensional time. I want to hear about time = , multiple independent temporal variables. What I get is time = . Multiple components, but a basis . It is described as there being a basic unit of time "t" events are measured in. Component 1: the amount of time intervals Component 2 The rate of progressing through these time intervals

@ineednochannelyoutube5384

2 жыл бұрын

Additional temporal dimensions would probably have to do with the different collapse of quantum superpositions.

Economists: "There is no free lunch" Non-Economists: The whole universe is a free lunch. Physics: "Matter can't be created or destroyed." Non-Physicist: "Tell me this again after teaching me about big-bang theory."

@kedrednael

2 жыл бұрын

Wouldn't physics say: Matter is energy?

@InventiveHarvest

2 жыл бұрын

The Universe is a free lunch that requires effort to gather. This effort is the cost of lunch.

@johannageisel5390

2 жыл бұрын

@@kedrednael Yeah, that's weird. Every physicist knows that matter can very well be destroyed into energy or created from it.

@johannageisel5390

2 жыл бұрын

@@InventiveHarvest The effort will also increase entropy.

@Lusa_Iceheart

2 жыл бұрын

@@johannageisel5390 Hmm, I suppose you could say Entropy is like a tax; you get nothing for paying it, you can't avoid paying it, and the asshole who set the rate doesn't listen to his constituents but swears it'll be better in the next term.

PBS SpaceTime is THE channel from which I came to SFIA in 2016 and I became ~10000th subscriber. There was a video about black hole ships here and I remember being impressed. And a similar video also came on Spacetime at the same time, so youtube recommended me SFIA channel's video.

Hi this is one of your best videos yet and I have really enjoyed your work over the past few years. I would like ask you about the no real images of the earth from satellites in high orbit.

Super cool episode

Lee Smolin had a theory that black holes formed new universes with slightly different physics. As such, one prediction is that universes should be tuned to making more black holes.

@AreEia

2 жыл бұрын

Yeah, and it seems like a really interesting theory(especially considering our universe in particular, has attributes that makes it an almost ideal blak hole "spawner") but it is part of the many worlds theory. Ofc, both could be true. And if our universe has other variants/temporal states we can cross into/use as a medium, and there is a hyperspace above that again. I would say then that the possibilities of many worlds is almost 100%. The really cool thing I think, if any of these cases are true. Is that with our universe being such a damn good black hole creator, we might end up being like the central travel point/nexus for travel across both our other temporal variants and the multiverse, sometime waaaaay off in the distant future. That would be neat :)

Great episode.

awesome episode!

Love your videos

Hey Isaac, another great episode. Thanks! I was wondering if you could explain what it would take to divert very cold air from the troposphere to ocean level, for example in the Arctic? How difficult would this be? Would it actually have a significant cooling and reflect effect to mitigate some of climate changes effects in at least that region? Thanks

I'm glad we get to play, before it's fully downloaded.

The changing pixel size analogy blew my mind 🤯

Beyond the edge of the universe is endless darkness with no wall or limit to it

classic I.A.! love it.

I tend to subscribe to the idea that time-space is plotted out on the inside or outside of a spherical shape. This allows for a foundation of infinity, being as there are infinite coordination points on a sphere. Of course, this might mean we're all trapped on an event horizon...

You should add Perpetual Motion machines in the Clarcktech series. By the way, I watch your videos once in a way and keep doing what you love most!!

Hello Isaac, great vids, great channel. What do you think about Sir Penrose CCC theory?

Ahhhhhhhhhhh. AHHHHHHHHHHHHHH. YESSS!!! Sorry, bad week in the office, stressed, hit home, personal stuff. Midnight, mind still going, stumble across IA new video. Hit click. Isaac's soothing voice for 25 mins on a super interesting topic. And although I have no cookies or chips, I do have four bottles of high strength beer in the fridge. AHHHHHHHHHHHHHH DOES LIFE GET BETTTT-EERRRRR!

I am 10 days late but happy 7 year anniversary on your first video!

I do think I've seen that compacted universe hung on a collar a cat was wearing and it's slightly bigger brother in the work locker you "don't open unless emergency"....🤫😉 ✌️ Favour ALL, Isaac Sarah

@davidfinley1214

2 жыл бұрын

A cat in a morgue??

dude, your diction has improved markedly . . . huzzah!

Truly an epic journey.

Isn't it so cool how you can detect the end of the episode by some queue in Isaac's voice. It's sort of like it always ends in a bit of a joke/paradox and can detect the end by his tone of voice. I can't really describe how I know.

The kitten was absolutely unneeded, but sincerely appreciated.

So...internally, the travel time for a photon is 'zero' regardless of the distance (or how much time passes for some observer). What happens if the travel distance is literally infinite though, due to there being nothing to interact with? An infinite travel time from an external perspective, and yet still instantaneous internally?

Traveling back near the big bang would not only be difficult due to high energy, but anything you do, even merely existing there, would affect the evolution of galaxies. All the smallest of changes would magnify as the universe evolves. You hull cutting through that plasma would change densities, and that would in turn create greater densities that probably wouldn't have occurred otherwise. Add Chaos theory on top of that and you changed everything in the end.

That dark energy is coming from somewhere.

15:00 - I though that was how FTL worked in babylon 5...

The opening phrase of this video is my favorite quote to all those that like to play smart by parroting "nothing moves faster then light"! =))

@ineednochannelyoutube5384

2 жыл бұрын

@@fantasyEXX No they did not.

The question is it that edge has drinks and snacks.

How is it possible to make such stellar ( höhö ) content and drop it with this frequency? Does Arthur live next to a black hole to find the weeks of production time to drop these almost daily?

@virutech32

2 жыл бұрын

he has a decent backlog & writes these eps weeks or months in advance.

Hey, Isaac. Have you written any books that are science fiction? I feel you'd be gangsta at it.

Watching your channel makes me know how much we don’t know. I guess all we can do is have faith that our universe has some reason for existing.

great intro

...we’re not bothered by kicking cans down the road in science so long as the can arrives where it is supposed to be. Which for a lot of theories is apparently the recycling center... - Isaac Arthur

16:00 - back when Star Control 2 came out, this method of FTL seemed to be something like was implied in its form of FTL.

Who the hell would thumbs down this??? Great job man, once again. We appreciate you

@Andrew-zq3ip

2 жыл бұрын

Flat earthers

So the part I don't understand about the 'upscaling' universe stretch bit, if all matter takes up space, and that space is expanding, then either that space is leaving the matter that previously occupied it, or the matter is expanding alongside the space (as the space expands, so does the matter there)? I'd imagine it's the former, as in the latter case I fail to see how distances between objects would change.

We already jump dimensions. Your perception is the only thing in motion, through time. Reality is that stack of paper, or maybe slides, composed of parallel dimensions. Your perception moves from a fixed point on one slide, to an adjacent point, on the next slide, in what seems to be a single direction. Something in the structure of the mammalian brain, another sense perhaps, allows it to perceive this motion. This makes it possible to choose, the next point; or at least, present the illusion of choice.

This reminds me of multiple fictional universes.. One is Minecraft and The Nether, the other is Warframe and The Void, a third is Warhammer 40,000's extradimentional plane, though I'm not as read up on Warhammer 40,000 as I am on Warframe and Minecraft

Does anyone know what happened to hades 9? I remember Isaac talking about it a few years ago but I haven’t been able to find anything on it since.

@empireempire3545

2 жыл бұрын

Afaik it fizzled out?

@fluffysheap

2 жыл бұрын

Isn't that the realm where Satan himself is chewing on Judas, Brutus, and... Uh a third guy who isn't as famous

Idea: the universe isn’t getting bigger. Everything within it is getting smaller. Gravity pulls local objects toward each other, making it less noticeable at short distances.

I do love a good paradox.

00:00 technically, there is space generated between us and everything else... in a geometric progression in relation with the distance to... stuff

I've always wonder what is the area/space that the universe expands in to. If it is expanding then there MUST be something beyond/outside of our universe.

Here early enough to see and reach the edge. Got my drink and food ready.

Man, I fell asleep while listening :( usually I'm okay with that, but it's morning and I just woke up

these videos are usually easier to follow

So around 6:00 min your talking that the apparent relative speed out paces light as the relative volume of space between increased?

I havent watched your videos in months so i can binge watch all of them at once 😄🙌

Never thought I'd see that Sudo scientist Kuku here

So all we need are time traveling hyperspace ships to fly beyond the edge of what we can see, take some pictures and come back for us to figure this thing out? Before watching this video I thought the answer was going to be something complicated.

Could you please do anepisode on wormhole induction propulsion?

time runs slower where a lot is happening. It's the system lagging.

What if the real edges of the universe were the friends we made along the way?

@lancerkind4055

2 жыл бұрын

Explain please.

Does anyone else instantly like the video before the intro? Just know it's gonna be good!!

@2:17 - 2:24 Laughed out loud, that was great

Isaac's already lining up his dad jokes. I approve.

How does the 'heat death of the universe' where the skies are a void - mesh with our own galaxy (or after the merge of us and Andromeda)? Wouldn't those local stars still be in the sky or would it be a question of star production being stymied and those stars eventually dying out (creating the void).