I'm so thankful to have been born into a digital age, I'd have had no chance whatever without these visualizations of understanding many of these concepts
hang da clown so you like to learn fantasy?? Maybe try learning real science not pseudoscience that’s all this is. It’s none sense a violation of natural law.
Toroidal and Hyperboloid Universe, they are mathematically opposites, called Aether. Dielectric Hyperboloid surrounded by Dielectric voidence/magnetism torus. Scalable Aether, Casimir Effect, Universe. Milky Way is helically rotating through the magnetic torus. The Great Attractor and the Dipole Repeller.
@@gyro5d Dude for your own health, get out of your conspiracy theory bubble. I know everything sounds cool, but actual physics and reality are much cooler.
No joke, this is something similar to what a friend saw on acid. She was a math nerd so her trips were very math and physics heavy, but it's interesting to see connections here as well.
@@misakamikoto8785 I would say that drugs aren't for everyone. And that the vast majority of people aren't careful with them. But if you do extensive research before hand and understand the risks involved and how to avoid addiction, I see no reason why they would be considered "bad."
David Henderson I agree, but also it’s a dangerous game to play. We know very little about some of these very taboo drugs, and they can have wildly different effects depending on the person. You have control to an extent, but essentially you are running an experiment on yourself.
Next Video: What a Spherical Universe might look like (If you're high). Haha. Awesome video I believe as always! Very much to learn and have a new grasp of!
There's a new game out on Steam called Hyperbolica that takes place in hyperbolic space, but one section has spherical geometry like you described here, where if you back away from in object, it eventually becomes larger and appears to flip upside-down...Very trippy, especially in VR!
No significant amount of water, snow, dust, powder, scraps, ashes, mud, or sand molecules will ever stick to a spinning ball (or even a stationary ball), there is no force that curves that water and land to the shape of a round ball! Even though little splash-drops of water stick to a round ball; sand, grass, wood-scraps, ashes, powders, hair, and God knows how much things won't even partially stick to a spinning or still-dead round ball of any size ! There isn't any real, non-animated, non-photo-shop edited, or non-fish-eye lensed image or video showing Earth as a round globe ball covered with about 70% water on the surface, traveling in outer-space non-stop at ultrasonic mega speeds of well over 100,000 kilometers an hour! That is halarious and just simply flat-out impossiball! "So, Earth travels about 1.6 million miles (2.6 million km) a day, or 66,627 mph (107,226 km/h)." - according to "real" earth science www.space.com/33527-how-fast-is-earth-moving.html Notice how NASA (Never A Space Adventure) describes that the fake, deceptive model of the "Globe" is a spinning ball traveling in "Outer Space" at 66,627 miles an hour; The first 3 digits of the Globe-model's traveling speed in the English measuring system is the Number of the Beast as described in the Book of Revelation : [666]!!!
This quote actually comes from Sharon Begley, a reporter who was doing a profile on Sagan for Newsweek magazine. The article was about Sagan, but the portion that contained this quote was her own writing. Funnily enough, Sagan apparently disliked the word "incredible" and wouldn't have used it himself. Cool quote nonetheless, imo.
What if we are just an observer of the entire spherical universe and we are at the farthest distance from it in a hypersphere. Either we are stationary and the hypersphere is expanding, or we are inching towards it very slowly
@10:20 can someone tell me what those yellow grid lines are from? They didn't show up when his eye was going around in the great circle, and then he says 'if I angle the camera properly" then those yellow lines show up. They seem to show a torus shape and I'm not getting where that comes from on a 3-sphere or if its an artefact of the programming?
@@TonyOneBlairoby light only redshifts if there is spacetime curvature it's affected by. When you refer to great distance then our universe the red shift happens because space is actively expanding due to the dark energy. This program does not simulate spacetime curvature, just space curvature and thus such effect as redshift does not appear here.
I think that is a perfectly normal biological response. Your brain is struggling to process this weird space and gets frustrated as it fails. I think it's important to not view this as some madness but rather a limited perspective and when it comes to movement and decision-making in this space you should not rely on visual sensory information completely but mostly on analytical reasoning. When you do make a decision and start moving and the changes appear weird, don't question it too much and think that that is how it is supposed to change Those are just my thoughts anyway
That's normal. Your brain is tuned to how things behave in this universe. When things contradict this fundamental assumption your brain gets very confused, which can make you feel uncomfortable. If you lived your life in such a universe and came back here, you would probably feel the same.
@@ViciousVinnyD Your brain is tuned to how "you're taught to think" things behave in the universe. You left out that crucial part. Your brain just doesn't know how things are supposed to work. Hence science, experimentation, and this amazing channel of discussion for us humans to learn from.
3:00 a good visual reference for this phenomenon is the Kremlin scene in Mission: Impossible Ghost Protocol, when they use a projected screen + camera down a hall to appear "invisible" to a guard.
If you lived in that universe, the atoms in your body would follow the same paths as the light so things wouldn’t seem that distorted. Wouldn’t it look more like the first models in the last video?
Fantastic explanation. It brought me on a learning journey. It is especially helpful when you reiterate the point by asking a question like "Wait, how..."
I hope you keep making videos man they are very visually stunning and simplistic, your way of teaching is easy to follow and to remember! Looking forward to more videos!
This reminded me of SHM, where you wrap around a circle and your shadow does SHM on a surface! I liked the way you explained the concept of a hypersphere.
Far from meaning to downplay the always gorgeously stimulating and thought-provoking quality of any of your videos, I must say that the cosmological turn shown in some of the last ones is overwhelmingly enthralling! I really hope to catch many more light beams on this vertiginous wavelength from the ‹brilliant› ZachStar! 🔭✨🌟✨
I gotta say , I've never understood non euclidian space until now. You are extremely good at breaking things down in an understandable way . I'm an intelligent guy and I just never understood it until now . Well done .
What a great explanation! Curved Spaces is such a powerful tool, it really is amazing that they give it away free. Your explanation about great circles is very enlightening. And your conclusion is right on the money: “This is how light behaves in a spherical universe. And since things don’t look like this when we look out into our universe, does that mean our universe is not spherical? Well, not necessarily. On a small hypersphere we could recognize this curvature. But if we’re on a hypersphere many times larger than the observable universe, then detecting that curvature is much more difficult.” So even though we have evidence that the universe is flat there is still room for a margin of error allowing for a small amount of curvature, and my money is still on point line circle sphere hypersphere within hyperspheres as a way to imagine the dimensions. Our observed 3D universe exists within a reality that appears infinite but is actually finite but unbounded, IMHO.
Kerr Finite but unbounded is like the surface of the planet. You can be on the equator and start heading east and keep doing so forever. You do end up where you started eventually, but you can still keep heading east forever. So it feels infinite but it’s really finite but unbounded.
@@10thdim Ah, now I get what you meant. You usually call these types of spaces closed. Such a universe doesn't need to be a 3-sphere like described in the video, it can even be a torus or any other shape. Some of them, like the torus, seemingly containing wormholes. Empirical data shows that the curvature of the universe is very close to the value that would make it flat and presumably infinite. But it could also be closed and extremely large, so large that our observable universe is just a microscopic fraction of it.
Kerr Right. As I quoted Zach, “if we’re on the surface of a much larger hypersphere then detecting that curvature is much more difficult.” But that is not to say the hypersphere is infinite, like a sphere it too would be finite but unbounded, or closed if that’s your preferred terminology for the hypersphere.
You should really polish up some of the tools/programs you use for your demos for public use. Have something like Paul Falstad's website where you have all of these cool physics applets people can play with. That site is a treasure trove of stuff like that. It'd be so cool if you made something like that.
You know, when I was playing around with the matric of a sphere "pythagoras theorem for a sphere" I realise this affect in my head. It drove me crazy what I'll see. Now that i can visually see it, I can be a happy subscriber. keep up with the good work. ohh if you have time is it true that the sum of volumes of all even dimensional spheres* with radius zero equals to 1 ?
I can also add that Spherical universe with Newtonian time acts as a lense. One effect of a lense is making rays converge which is unnatural in usual life. Eyes hurt when you look on close objects, and converging rays correspond to negative distance. Like something is pushed inside eyes beyound retina. Big negative distance actually becomes comfortable again for viewing because it is not different much from parallel rays. However, if universe is small and transparent, the hair on the back of your hair will happily produce an image that will make your eyes hurt if you try to focus on it. The hair is literally pushed into your eyes on the depth of hair compared to eyes, because light almost manages to make a full circle and return to original point when eyes catch it.
The appearance of the earth when you're travelling around the spherical universe matches a sin wave very well. When you're at 0 on the y-axis, you see the earth surrounding you. In the positive Y, Earth looks normal but in the negative Y, Earth is flipped. Thought that was pretty interesting.
I definitely find it amusing that a video about the earth hypothetically being not just non-flat, but something beyond a sphere, gets a youtube context box explaining the flat earth conspiracy...
don't you have to have very very long distance vision to see this though? like, we're talking 100000000000000000000000000000000000 light years that we can see all at once right?
The statement on the slight curve in 3D to make a hyper-sphere may be correct, but if Time is orthogonal to all the 3D dimensions this says nothing about how 3D curves. However we do have experimental evidence of the curve from seeing the starlight shift near the Sun. Taken to the far limit we may see a slight curve. F. Miller
At a certain universe expansion rate you would only see so many objects because light would not have time to travel to you, even if the hypersphere is small. Basically we would see a small region of space that would look flat. The higher the expansion rate, the smaller the region.
Im happy I found this bc I was wondering what would it be like to see the earth from the" inside" But we actually Do "see" (collecting visible light waves from the environment) the workd in 3d, which is sort of spherical, when i float in the sea and look up, the water frames my whole field of vision, and if the sky is cloudy, the clouds will look like "fish eye" wrap...
You can’t really compare how parallel lines move on a solid sphere and the Universe. If the Earth was made of gas or a liquid then you wouldn’t have to follow the curvature. Plus the Universe is so huge it will be difficult for us to detect any curvature.
When we were "inside" the Earth, but it was actually on the opposite side of the sphere, could that describe how we Cosmic Microwave Background Radiation? Coming from all directions but actually far away?
The red line actually IS a line segment. You can tell by 2 things. It's a line... And it's not infinite, so it's only a segment. Curving, non-infinite, lines like you want are still... simply put... Line segments. If it has a start and end, doesn't cross over itself, or end at the start point... Line segment.
universe radius, in this case, is ~116.1831ly. you can count it yourselves by using supergiant stars(made them so big by hypersphere) BC Cygni & Betelgeuse. also, if you try to move two dots in the same way in hypersphere, their paths will cross. now you know the radius, you know local "gravitation", you can count the speed we are flying in it))
So what you are telling me is that the CMBR could, in theory, be on the exact opposite side of the 3-sphere that is our universe and as such could just be what the opposite side of the universe looks like and in fact not be an early picture of the universe as a whole?
Around the sphere you could never see the past. Time as he explained is the 4th dimension that we can't move through or see, much like the 2d people can't see our 3d world. As a 3d being you would only see the surface of this sphere as the present.
Also it would help a lot if you show what it looks like traveling towards the object, but looking in a perpendicular direction e.g. left. This video explains thoroughly what it looks like traveling towards the object and looking straight at it as well, but what if Im traveling straight towards Earth but looking left? In a non flat space, I SHOULD see something right?
Wouldn't the huge distant Earth in that universe be a past version as well, as the light would have had to have travelled so much further to get to your eye. In fact, as soon as you pass through (how?!) the actual Earth, you'd see a present version behind you, and a very slightly past version in front of you, no? This has given me a headache...
I see down in the comments that some people are mentioning redshift in combination with the dimmer and bigger earths on the background. I have this theory for years! If the universe is indeed a hypersphere. Then the redshift might have connection to this 4D theory. But besides of dimmer. I also think there is a hypersphere-horizon. What I mean is that the light in 3D is forced to make a turn in 4D. When an object makes a turn, it looses energy. Think about a car or rocket going in a new direction. It uses fuel. It might be the same for the light as well. But the energy loss is now redshift. Eventually the light has lost all energy, making a "horizon", or a cosmic background image. Cheers, X3M
Would be neat to have this except also with a very slow simulated speed of light, so that the copies you see which are further away would be from the past
Nice to see how the geometry would work with an infinite light speed. With finite light speed, however, you'd only see, at most, half the universe. Specifically, the c²dt²=c²dτ²+dΣ² metric where stationary objects (with respect to the CMB) separated by more than 90° appear to be expanding away from each other faster than c regardless of the size of the hypersphere. The radius is just the age of the universe. Technically, a universe with infinite light speed would be perfectly flat as there's no relation between time and space for space to curve into given that c is just the ratio of unit lengths to unit time intervals.
Very true. Let's also add mass of objects makes gravity. Gravity causes distortion aka bending/curving. So what we saw here would be under perfect conditions. First time the light enters the tiniest proximity of a gravitational field, we would lose the image.
In the video he shows us "inside" the earth from the diametrically opposite side of the universe. You would see that image, but no matter (assuming it's empty on the exact opposite area) would exist. So yes, and inside out Earth sized hologram is technically what you would see. 😃
Zach: "Straight lines in spherical geometry are great circles (...) Latitud lines are not great circles". Also Zach: *Draws a straight line over a latitude line at **4:42*
So does this possibly mean that because we see the universe all around us (everywhere we look), we are self aware on the opposite side of the hypersphere plane?
I'm so thankful to have been born into a digital age, I'd have had no chance whatever without these visualizations of understanding many of these concepts
well you're one up from me, i still have no idea what the fuck is going on in this lol
Wow that says a lot about your cognitive abilities.
Many of us have very little understanding even with these visualizations.
@@shelby3347 that I learn better watching it happen?
hang da clown so you like to learn fantasy?? Maybe try learning real science not pseudoscience that’s all this is. It’s none sense a violation of natural law.
"Even if you're sober." It's Saturday, you've way too much faith in me
Now I would like to see hyperbolic universe
Toroidal and Hyperboloid Universe, they are mathematically opposites, called Aether. Dielectric Hyperboloid surrounded by Dielectric voidence/magnetism torus. Scalable Aether, Casimir Effect, Universe. Milky Way is helically rotating through the magnetic torus. The Great Attractor and the Dipole Repeller.
@Puvendran Pillay code parade only explained it in 2D, i want to see it expalined in 3D, like in this video
Puvendran Pillay He IS, however, making a game based on spherical and hyperbolic spaces. Those videos were his most recent
@Kire euclidian probably more aliens things or Maxiverses crystal structures and hyperbolic probably more natural things.
@@gyro5d Dude for your own health, get out of your conspiracy theory bubble. I know everything sounds cool, but actual physics and reality are much cooler.
No joke, this is something similar to what a friend saw on acid. She was a math nerd so her trips were very math and physics heavy, but it's interesting to see connections here as well.
drugs are bad, mkay?😁
Misaka Mikoto haha, sure.
@@misakamikoto8785 I would say that drugs aren't for everyone. And that the vast majority of people aren't careful with them. But if you do extensive research before hand and understand the risks involved and how to avoid addiction, I see no reason why they would be considered "bad."
David Henderson I agree, but also it’s a dangerous game to play. We know very little about some of these very taboo drugs, and they can have wildly different effects depending on the person. You have control to an extent, but essentially you are running an experiment on yourself.
Maybe he should get off of it then! Hahaha
Next Video: What a Spherical Universe might look like (If you're high).
Haha. Awesome video I believe as always! Very much to learn and have a new grasp of!
I want to know what a spherical universe looks like when you're drunk
Might look like mars
There's a new game out on Steam called Hyperbolica that takes place in hyperbolic space, but one section has spherical geometry like you described here, where if you back away from in object, it eventually becomes larger and appears to flip upside-down...Very trippy, especially in VR!
This is like the anti-flat Earth
round earth? nah, round UNIVERSE
Flat Earth's Nega-chin
@@wisittipsingha2439 Let’s say its not perfectly round.
No significant amount of water, snow, dust, powder, scraps, ashes, mud, or sand molecules will ever stick to a spinning ball (or even a stationary ball), there is no force that curves that water and land to the shape of a round ball!
Even though little splash-drops of water stick to a round ball; sand, grass, wood-scraps, ashes, powders, hair, and God knows how much things won't even partially stick to a spinning or still-dead round ball of any size !
There isn't any real, non-animated, non-photo-shop edited, or non-fish-eye lensed image or video showing Earth as a round globe ball covered with about 70% water on the surface, traveling in outer-space non-stop at ultrasonic mega speeds of well over 100,000 kilometers an hour! That is halarious and just simply flat-out impossiball!
"So, Earth travels about 1.6 million miles (2.6 million km) a day, or 66,627 mph (107,226 km/h)." - according to "real" earth science
www.space.com/33527-how-fast-is-earth-moving.html
Notice how NASA (Never A Space Adventure) describes that the fake, deceptive model of the "Globe" is a spinning ball traveling in "Outer Space" at 66,627 miles an hour; The first 3 digits of the Globe-model's traveling speed in the English measuring system is the Number of the Beast as described in the Book of Revelation : [666]!!!
@@EvikeMVo you need help
I think my mind is more bent than the beam of lights
This was absolutely fantastic. You guided the thought/visual experiment really well!
playing this game is so fun while high
Well yes. I found this video by accident while smoking. So glad I did
@@jamesboulton5636 same lol
James Boulton lmao same. Smoking now 😂
lol same wtf
Stfu weeb trash
These videos are amazing. You explain really complicated concepts so well that a high schooler can understand them (like me).
“Somewhere, something incredible is waiting to be known.”
― Carl Sagan
That would be God
Lmao Mario maker, that kinda doesn't apply but ok. Lol
This quote actually comes from Sharon Begley, a reporter who was doing a profile on Sagan for Newsweek magazine. The article was about Sagan, but the portion that contained this quote was her own writing.
Funnily enough, Sagan apparently disliked the word "incredible" and wouldn't have used it himself. Cool quote nonetheless, imo.
8:57 This reminded me of the wormhole travel from Interstellar. That movie was just brilliantly made
Exactly what I was thinking
What if we are just an observer of the entire spherical universe and we are at the farthest distance from it in a hypersphere. Either we are stationary and the hypersphere is expanding, or we are inching towards it very slowly
@10:20 can someone tell me what those yellow grid lines are from? They didn't show up when his eye was going around in the great circle, and then he says 'if I angle the camera properly" then those yellow lines show up. They seem to show a torus shape and I'm not getting where that comes from on a 3-sphere or if its an artefact of the programming?
Spherical boi :v
s p h e r i c a l
GameSphere
Next time sponsored by a motion sickness treatment.
Is there a reason why the brightness of the Earth seems to change throughout the animation?
I believe it's because the program has a fog feature where far away objects appear hazier than close objects.
@@PianoMastR64 Yeah, exactly, it's pseudo-fog that sadly does not really work well. Does anybody know if the source code was published?
Isn't it just because of redshift? Light that travel long distance to reach your eye have lost most of their intensity along the way.
@@TonyOneBlairoby light only redshifts if there is spacetime curvature it's affected by. When you refer to great distance then our universe the red shift happens because space is actively expanding due to the dark energy. This program does not simulate spacetime curvature, just space curvature and thus such effect as redshift does not appear here.
I feel that's because intensity decreases with distance so we're a seeing a dimmer Earth as light is travelling all the way around the sphere.
I've been waiting for a simple explanation of this for all time. Thanks for showing me the inside of the kaleidoscope called spacetimelifeuniverse.
for some reason the concept of objects farther away appearing bigger to you is just really terrifying to me for some reason
when you accidently eat a weird brownie from your brothers room
That would either be a turd or a pot brownie
Mr Star, I have been following you for years. This is a brilliant perspective, that I have never thought of before.
I need a drink now.
I feel like I’ve already had one
I know I have already had five.
When I watch this, I’m fine, but when I try to “play” this in any spherical space I get strangely uncomfortable. Am I the only one?
I get strangely uncomfortable just watching it, I'm not sure if it'd be better or worse for me if I had control of the movements myself.
I think that is a perfectly normal biological response. Your brain is struggling to process this weird space and gets frustrated as it fails.
I think it's important to not view this as some madness but rather a limited perspective and when it comes to movement and decision-making in this space you should not rely on visual sensory information completely but mostly on analytical reasoning. When you do make a decision and start moving and the changes appear weird, don't question it too much and think that that is how it is supposed to change
Those are just my thoughts anyway
@@DanteKG. thanks. Im still dizzy
That's normal. Your brain is tuned to how things behave in this universe. When things contradict this fundamental assumption your brain gets very confused, which can make you feel uncomfortable. If you lived your life in such a universe and came back here, you would probably feel the same.
@@ViciousVinnyD Your brain is tuned to how "you're taught to think" things behave in the universe. You left out that crucial part.
Your brain just doesn't know how things are supposed to work. Hence science, experimentation, and this amazing channel of discussion for us humans to learn from.
3:00 a good visual reference for this phenomenon is the Kremlin scene in Mission: Impossible Ghost Protocol, when they use a projected screen + camera down a hall to appear "invisible" to a guard.
You cannot "see" it is curved, because light follows the curvature, so there is no horizon.
If you lived in that universe, the atoms in your body would follow the same paths as the light so things wouldn’t seem that distorted. Wouldn’t it look more like the first models in the last video?
Fantastic explanation. It brought me on a learning journey. It is especially helpful when you reiterate the point by asking a question like "Wait, how..."
Spherical universe, when you look up u see Australia
Australians: 👁👄👁
I’ve been looking for a good explanation of 3 sphere universe and this video has helped me so much with understanding. Thank you so much! ❤
I hope you keep making videos man they are very visually stunning and simplistic, your way of teaching is easy to follow and to remember! Looking forward to more videos!
This reminded me of SHM, where you wrap around a circle and your shadow does SHM on a surface!
I liked the way you explained the concept of a hypersphere.
Far from meaning to downplay the always gorgeously stimulating and thought-provoking quality of any of your videos, I must say that the cosmological turn shown in some of the last ones is overwhelmingly enthralling! I really hope to catch many more light beams on this vertiginous wavelength from the ‹brilliant› ZachStar!
🔭✨🌟✨
This is the first explanation that I could actually wrap my head around, thanks!
I gotta say , I've never understood non euclidian space until now. You are extremely good at breaking things down in an understandable way . I'm an intelligent guy and I just never understood it until now . Well done .
Great video as always !!!!
What a great explanation! Curved Spaces is such a powerful tool, it really is amazing that they give it away free. Your explanation about great circles is very enlightening. And your conclusion is right on the money: “This is how light behaves in a spherical universe. And since things don’t look like this when we look out into our universe, does that mean our universe is not spherical? Well, not necessarily. On a small hypersphere we could recognize this curvature. But if we’re on a hypersphere many times larger than the observable universe, then detecting that curvature is much more difficult.” So even though we have evidence that the universe is flat there is still room for a margin of error allowing for a small amount of curvature, and my money is still on point line circle sphere hypersphere within hyperspheres as a way to imagine the dimensions. Our observed 3D universe exists within a reality that appears infinite but is actually finite but unbounded, IMHO.
Finite and unbounded? The universe being unbounded would imply it being infinite, because that's how you usually define "infinite" in such cases.
Kerr Finite but unbounded is like the surface of the planet. You can be on the equator and start heading east and keep doing so forever. You do end up where you started eventually, but you can still keep heading east forever. So it feels infinite but it’s really finite but unbounded.
@@10thdim Ah, now I get what you meant. You usually call these types of spaces closed. Such a universe doesn't need to be a 3-sphere like described in the video, it can even be a torus or any other shape. Some of them, like the torus, seemingly containing wormholes.
Empirical data shows that the curvature of the universe is very close to the value that would make it flat and presumably infinite. But it could also be closed and extremely large, so large that our observable universe is just a microscopic fraction of it.
Kerr Right. As I quoted Zach, “if we’re on the surface of a much larger hypersphere then detecting that curvature is much more difficult.” But that is not to say the hypersphere is infinite, like a sphere it too would be finite but unbounded, or closed if that’s your preferred terminology for the hypersphere.
this helps stop panic attacks by creating another panic attack that cancels out the first one, thanks mr star
These were great visualizations, and a great video too.
This was a superb presentation of the overarching concept. Kudos.
You should really polish up some of the tools/programs you use for your demos for public use. Have something like Paul Falstad's website where you have all of these cool physics applets people can play with. That site is a treasure trove of stuff like that. It'd be so cool if you made something like that.
Plz make a video on quantum computing
Quality vids homie. Thanks!
You know, when I was playing around with the matric of a sphere "pythagoras theorem for a sphere" I realise this affect in my head. It drove me crazy what I'll see. Now that i can visually see it, I can be a happy subscriber.
keep up with the good work.
ohh if you have time is it true that the sum of volumes of all even dimensional spheres* with radius zero equals to 1 ?
Are you watching PBS Infinity?
They have excellent videos on pure mathematics and applied mathematics.
@@funkyflames7430 Hey I enjoyed them while they were still fresh. I'm studying mathematics any way so...
Thank you... Wonderful explanation 👍
It is the year 3020, there are still people believe that Universe is flat, flat Universers.
Ayyyy another one of these!
I can also add that Spherical universe with Newtonian time acts as a lense. One effect of a lense is making rays converge which is unnatural in usual life. Eyes hurt when you look on close objects, and converging rays correspond to negative distance. Like something is pushed inside eyes beyound retina. Big negative distance actually becomes comfortable again for viewing because it is not different much from parallel rays. However, if universe is small and transparent, the hair on the back of your hair will happily produce an image that will make your eyes hurt if you try to focus on it. The hair is literally pushed into your eyes on the depth of hair compared to eyes, because light almost manages to make a full circle and return to original point when eyes catch it.
Makes me feel less crazy for thinking that the microwave background may be some image of my neurons. Atman is Brahman.
The appearance of the earth when you're travelling around the spherical universe matches a sin wave very well. When you're at 0 on the y-axis, you see the earth surrounding you. In the positive Y, Earth looks normal but in the negative Y, Earth is flipped. Thought that was pretty interesting.
“What is now proved was once only imagined.”
-William Blake
I definitely find it amusing that a video about the earth hypothetically being not just non-flat, but something beyond a sphere, gets a youtube context box explaining the flat earth conspiracy...
Wow I actually felt a little dizzy “inside” earth. Great job starman!
don't you have to have very very long distance vision to see this though? like, we're talking 100000000000000000000000000000000000 light years that we can see all at once right?
Indeed. Average human vision is something like 15km though. Long shot away from seeing the backs of our own heads from around the universe 😃
The statement on the slight curve in 3D to make a hyper-sphere may be correct, but if Time is orthogonal to all the 3D dimensions this says nothing about how 3D curves. However we do have experimental evidence of the curve from seeing the starlight shift near the Sun. Taken to the far limit we may see a slight curve. F. Miller
Quite appealing animation.
great explanation!
Subscribed.... video easy to comprehend.
Thanks
Where can I further explore this topic......???????
This was so interesting, great video
damn these earths look so scary to me.
Mindblowing explanation
This is a great explanation. I find myself wondering what parallax would be like in a spherical space like the one you've described.
Will you make a video for a hyperbolic universe?
You've both broken my brain and managed to get me to understand this. That's... impressive.
Hard concept made easy. Great video. How would gravitational waves behave in such a universe, and how we would "feel" gravity?
At a certain universe expansion rate you would only see so many objects because light would not have time to travel to you, even if the hypersphere is small. Basically we would see a small region of space that would look flat. The higher the expansion rate, the smaller the region.
Seeing a spider from far away in this universe would be a nightmare
0:02 This is requiem.
Im happy I found this bc I was wondering what would it be like to see the earth from the" inside" But we actually Do "see" (collecting visible light waves from the environment) the workd in 3d, which is sort of spherical, when i float in the sea and look up, the water frames my whole field of vision, and if the sky is cloudy, the clouds will look like "fish eye" wrap...
You can’t really compare how parallel lines move on a solid sphere and the Universe. If the Earth was made of gas or a liquid then you wouldn’t have to follow the curvature. Plus the Universe is so huge it will be difficult for us to detect any curvature.
Imagine being diametrically opposite to someone in a universe like that!
in addition, the universe is too young and too large for any light to have gone all the way around since the speed of light is finite.
The expansion of the universe prevents it so never gonna happen
will we learn about hyperbolic places next video?
cool video mate
When we were "inside" the Earth, but it was actually on the opposite side of the sphere, could that describe how we Cosmic Microwave Background Radiation? Coming from all directions but actually far away?
Exactly. And when you were inside the inside out Earth there was no matter, only light. So it's technically an Earth hologram 🙃
4:59 This is not line segment. Line segment must bump up in the middle higher than parallel
The red line actually IS a line segment. You can tell by 2 things.
It's a line... And it's not infinite, so it's only a segment.
Curving, non-infinite, lines like you want are still... simply put... Line segments.
If it has a start and end, doesn't cross over itself, or end at the start point... Line segment.
we do live on a hypershpere tho, we just cant fully percieve it
1:36 I see that in games when I zoom mote then 100% sometimes
Zach I think you’re getting way too high during quarantine 😂😂😂
universe radius, in this case, is ~116.1831ly. you can count it yourselves by using supergiant stars(made them so big by hypersphere) BC Cygni & Betelgeuse. also, if you try to move two dots in the same way in hypersphere, their paths will cross. now you know the radius, you know local "gravitation", you can count the speed we are flying in it))
i.. want to see the evidence.
So what you are telling me is that the CMBR could, in theory, be on the exact opposite side of the 3-sphere that is our universe and as such could just be what the opposite side of the universe looks like and in fact not be an early picture of the universe as a whole?
Around the sphere you could never see the past. Time as he explained is the 4th dimension that we can't move through or see, much like the 2d people can't see our 3d world. As a 3d being you would only see the surface of this sphere as the present.
Amazing
Also it would help a lot if you show what it looks like traveling towards the object, but looking in a perpendicular direction e.g. left. This video explains thoroughly what it looks like traveling towards the object and looking straight at it as well, but what if Im traveling straight towards Earth but looking left? In a non flat space, I SHOULD see something right?
Could you please mention the software you use for simulation...
in the description :)
Wouldn't the huge distant Earth in that universe be a past version as well, as the light would have had to have travelled so much further to get to your eye. In fact, as soon as you pass through (how?!) the actual Earth, you'd see a present version behind you, and a very slightly past version in front of you, no? This has given me a headache...
* Astronauts at Diametrically Opposite Site
Wait It's All Earth!
It always Has been .
I see down in the comments that some people are mentioning redshift in combination with the dimmer and bigger earths on the background.
I have this theory for years!
If the universe is indeed a hypersphere. Then the redshift might have connection to this 4D theory.
But besides of dimmer. I also think there is a hypersphere-horizon. What I mean is that the light in 3D is forced to make a turn in 4D. When an object makes a turn, it looses energy. Think about a car or rocket going in a new direction. It uses fuel. It might be the same for the light as well.
But the energy loss is now redshift.
Eventually the light has lost all energy, making a "horizon", or a cosmic background image.
Cheers, X3M
My sleep deprived brain can't comprehend this but nice Video
because of the way the earth is it sometimes looks like it is shaped like a "bowl-shape" and it makes more sense when he turns around.
Would be neat to have this except also with a very slow simulated speed of light, so that the copies you see which are further away would be from the past
this is some kind of fever dream
Nice to see how the geometry would work with an infinite light speed. With finite light speed, however, you'd only see, at most, half the universe. Specifically, the c²dt²=c²dτ²+dΣ² metric where stationary objects (with respect to the CMB) separated by more than 90° appear to be expanding away from each other faster than c regardless of the size of the hypersphere. The radius is just the age of the universe. Technically, a universe with infinite light speed would be perfectly flat as there's no relation between time and space for space to curve into given that c is just the ratio of unit lengths to unit time intervals.
Very true. Let's also add mass of objects makes gravity. Gravity causes distortion aka bending/curving. So what we saw here would be under perfect conditions. First time the light enters the tiniest proximity of a gravitational field, we would lose the image.
"Even if you're sober"... But I'm not...
What program are you using bro?
do hyperbolic next
Wow brother love it 🙃💖🙏
I have a degree in math and this just blew my mind. Thank you for this wonderfully clear explanation!
What if you are “at sea level” but at the diametrically opposite side? Would you be surrounded by a hologram of sorts?
In the video he shows us "inside" the earth from the diametrically opposite side of the universe. You would see that image, but no matter (assuming it's empty on the exact opposite area) would exist. So yes, and inside out Earth sized hologram is technically what you would see. 😃
Zach: "Straight lines in spherical geometry are great circles (...) Latitud lines are not great circles".
Also Zach: *Draws a straight line over a latitude line at **4:42*
It's simmilar to the effect you get to see when looking at an object through a glass of water I think
So does this possibly mean that because we see the universe all around us (everywhere we look), we are self aware on the opposite side of the hypersphere plane?