Why is the universe flat?
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- เผยแพร่เมื่อ 10 พ.ย. 2014
- Cosmic inflation is a theory that was proposed in the 1980s by cosmologist Alan Guth to answer some of the most fundamental questions of the origins of our universe. It also solved the Horizon Problem and the Flatness Problem.
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I envy people who can understand all of this and more than this on a whim, and then be able to explain it to others at any given time. Great to have you in this world!
Dont underestimate your own level of understanding. You seem to have a humble attitude which is ideal for learning about science! But it takes alot of hard work and dedication. People who figure out stuff like this are human beings just like you, remember that!
Nice Selensewar! You are amazing. 😅
@@chlintvalenzuela6567 D: why? Thank you.
@R i'd really like to understand instead of just repeating. But i guess that'll never happen.
OK well her explanation everything was extremely tiny at the very beginning and you can figure that out by knowing PLANCK Time because our standard unit of measurement and seconds doesn’t do justice things were happening so fast that we created Planck Time to show you how fast things were happening so Planck Time there are more planks in one second than all of the seconds Since the big bag that’s pretty mind-boggling so about six planks in the universe is the stage and inflation it expanded 100 trillion trillion trillion trillion trillion times to the size of a grapefruit.
She is a joy to watch. Very articulate, bright, and energetic. Makes learning fun.
Yeah! :)
But I didn't understood much :(
She's phlat
Perfectly balanced, as all things should be
Ard-Jan van Etten too soon 😢
It's inevitable.
I used the stones to destroy the stones lol
Ok Thanos!
Bryh
- I used to always worry about my beer going flat.
- Now, I have to worry about the universe too?
You weren’t drinking your beer fast enough... you could have killed two birds with one stone.
@@SchitzNGigglez - So if we drink the universe real fast it will stop going flat?
@@tsamuel6224 mhm
@@tsamuel6224 just like a beer, the longer the universe remains outside our stomach the flatter it'll get. So the only way to stop the universe from going flat is to consume it before it becomes flat.
Let's face it. The definition of the word "flat" regarding an n-dimensional space is just too much for most people. In day to day context, "flat" refers strictly to a 2-dimensional space , as in "flat surface". In the context of the video, space is seen as a 3 dimensional surface, a hypersurface, a submanifold of a 4-dimensional space. The human mind cannot grasp the concept of flatness in this context as we are 3dimensional, unless you look at it through math. But most people in the comments just think she says the universe is really long, really wide, but not very thick, therefore it's flat... as in flat flat, which is not the case at all.
Dong In Kim That gif was really cool. Btw at some point the grid becomes slightly red near the body. Does that mean something?
Maybe these sci pop shows should start saying "space is not warped" instead of being flat.
and alcoholically, flat is the correct term for a beer that has had too much fun.
Thank you. I wish they'd explain that in the videos. I keep waiting for them to explain why or how 3 dimensions can be flat but they don't. They gloss over it.
"Clifford torus" sounds kinda dirty.
New video! Why is the universe flat? And why is it the same temperature throughout? The physics of Cosmic Inflation with Cosmologist Alan Guth buff.ly/1pPb9Ea
Nice video, poorly understood :(
Could the beginnings of our universe be matter that has exited from a massive black hole from another universe, or is that a silly question?
Physics Girl Yeah but it does explain why it expanded and then stopped to me that is a huge problem. Basically changing the laws to explain something we see.
Chris Lucas
the universe is expanding due to its evolution from a big-bang billions of years ago (Power which decreases by time): yet, eventually after this stage of expansion " the entire universe will collapse and shrink by gravity into limited space as it happened to be at the beginning.
for example if you throw a stone into the sky it will go higher and higher, but it will come back and fall.
Abdelaziz Galoul
Thank you but I think you misunderstood what I meant. Nice Allegheny though. But since the universe happens to be flat you would be wrong.If it was curved then you would be correct. What I was talking about was the physics be-hide the inflation and sudden stop of inflation at the first .0000000000000000000000000000000000000000000001 plank seconds after the big bang. To me and many this model breaks every law of physics. The model only explains the effect of inflation and does not explain how or what forces caused and then stopped it. Since nothing in the know universe is know to cause this. Kinda of like adding dark matter and energy to everything just to balance the equations. I think it is silly.
Came along this "old" video.... Amazing how you changed your presentation skills since then. Your passion and slightly "weirdness" ;-) is so much better today.
I know this is an old video, but it is the best explanation of inflation theory in layman's terms that I have seen so far. Really good work! Thank you!
Could you stop blowing my mind? I need it for stuff
I know right? Just damn disrespectful lol.
Is sexism necessary just because she is much smarter than you?
Thankfully I´m to stupid to understand what she´s talking about..So my dump mind can remain un-blown.
Alexander Schestag It seems like sexism is needed just because she is a female TH-camr...
That's a good one.
I can't believe it took me this long to find this channel! It's awesome!
Glad you like it!
Physics Girl If the universe was "flat" as you state that would mean the rate of expansion is slowing down but does that not contradict what we observe? According to our measurements the rate at which the universe is expanding keeps accelerating at a faster and faster rate, would that not imply that this idea of a "flat" universe is flawed?
Other than that I have to say you're great at explaining things, I love how enthusiastic you can get about the things you explain :D Keep the good work up you're awesome ;)
***** need answer for this...
Abarajithan Gnaneswaran What do you meean by that?
I'm also expecting the answer for ur question.. :-)
This is really quite spectacular. Physics girl has a gift for teaching.
I love your channel! Everything in the vid’s is perfect. Weldone,! I’m a big fan! I hop you guys continued with these scientific topics.
Flat earthers should adopt the flat universe instead.
Thats why its called universal theory of gravity! 😂😂 because its not an actual law of physics
Picture an 11 deimensional plane. Where the layers of the universe interact with each other like vibrating strings of a violin. 👀
We were once you
@Kenneth John Kelly Hahaha! I was just thinking something alongside your thoughts dude. Neil de Grass says there's no centre of the Universe, he gives his reason {am not trash talking by the way, am conversing, in case any children are in the room! Boom burn 🚸🤺🔥 lol}
Story short, we are all the centre, because we started small and now we occupy everything, so centre. Think of the earth, there's no centre to it's surface. That was his conclusion.
But I don't bite. You see, maybe the center, is not a centre, but a top. Or if it we have a centre, then there's a centre point - which is really what everyone is trying to get to.
Now, if there really were no centre, even if there is - the question remains - what energy made it begin in the first place? The universe, that is.
Someone had to put it in place. The same with a child. Someone had to place them somewhere, under the right conditions for it to become. And here we are, yet expanding to the critical mass of old age. Someone is definitely out there, scientists are great, but they don't know everything, and they don't own the universe. Men and women, humans like me that live and die between 100 years couldn't tell me how this all started.
@@wilton999 "Someone had to put it in place" - sigh...sorry, but some old man with a beard in the sky didn't create existence. In fact, the very concept of 'someone' didn't even exist until the last couple million years or so when our ancestor's brains evolved enough to start processing such concepts. Existence happened simply because it either does or doesn't (if existence didn't happen, there'd be nothing...that is the 'WHY' of the universe, not because some old man with human thoughts decided it would be nice if we had planets and stars and plants and rocks and water and everything).
@Kenneth John Kelly Explain to me how i've seen with my own eyes distant mountain tops (but not their bottoms) at sea, but could see their bottom as we sailed closer to shore, if the Earth is flat. And if i can see that the moon and at least 4 of the planets (even their moons) are sphere's with my cheap telescope, why is the Earth flat yet they're all spheres. Explain.
"Does it scare you that you science may be wrong" - you don't understand how science works. According to science, it's possible that gravity suddenly doesn't work and everything floats away into space...but the thing is, every time science makes an observation, we find gravity pulls things together. Science isn't about 'right or wrong', it's about what can be repeatedly observed (so who knows, maybe one day science will observe gravity not working, but because it's been observed working a bajillion times, we can call it a law of physics that will very very VERY likely never be broken).
If the universe was flat cats would have knocked everything off by now
yep.
If the Earth was flat cats would have knocked everything off by now, Seriously, unless you were joking about a flat Earth, I can honestly say there is plenty of evidence to prove that Earth is not flat.
Paul Foor - -Hmm About Flat Universe’s! You obviously are at the front door of Understanding.....Cats need a door flap....and then only the door knocker gets knocked on...Perhaps you should find your own cat flap, and stop knocking things over....”Nothing is possible because Nothing is not impossible!” RDR
@Kenneth John Kelly Myth and superstition only hold all of humanity back. You gullible religious zealots are preventing humanity from growing and bettering ourselves. Your gullibility and inability to grasp reason and logic truly depress me.
@@planexshifter Well said.
I still like watching your videos and getting a refresher course. Keep getting better, I look forward to new content to fill my brain
So here we are. 5 years later and flat universe might be wrong all along. With light from distance universes seems to bend just a tiny bit indicating that the universe has a curvature of Omega > 1, which might make it a ball. Thank you Plank-Telescope for this possible finding. Science is a wierd place nowadays.
"Planck evidence for a closed Universe and possible crisis for cosmology" from Nov. 2019 by Eleonora Di Valentino, Alessandro Melchiorri and Joseph Silk
No idea what you said.
where did you read that about keplers findings?
First off, kepler is satellite that has stopped its work now. Kepler finding are available on wikipedia btw.
@@nandinibhandari1838I mixed up Planck with Keplar but yeah...
"Planck evidence for a closed Universe and possible crisis for cosmology" from Nov. 2019 by Eleonora Di Valentino, Alessandro Melchiorri and Joseph Silk
You can also find some recent videos about it Nov, Dec here on youtube if you do a quick search.
So, distant objects can and are effected by gravitational lensing as well as being disrupted by concentrations of dark matter
We have barely explored less than 5% of our Oceans, and yet we know the temperature on both edges of the universe
*of the observable universe
else we have know the temperature of the oceans for a long while now. But I get your intention, just pointing it is a false comparison.
We are far better equipped to gather data from the EM spectrum than we are to overcome the extreme conditions of deep sea diving. It's not about lack of focus, it's about technology.
exactly, we don't...lol.. astrophysicists are basically people who make guesses based on limited information... like thunder comes from gods fighting in the heavens...lol
They also have very limited imaginations and so won't explore all possible explanations, only the ones that fit into their current understanding of the universe.
Not to get off topic but I find it funny now that some scientific schools of thought think that our world is simply a virtual reality simulation... seems to be catching on as a "good" idea... but yet somehow a "creator" of a similar virtual reality system is beyond their comprehension.... take also into account that current science is now saying the universe runs, in the background or underlying code, similar to website code...lol... but no no one "Created" it lol....
I find science quite funny at times how opposing they can be in thinking and how biased they can be.
Jason, when I saw mathematicians explaining universe with 4, 5, up to 20 dimensions, the non-existing (atleast never observed to be fair) matter and energy, I saw what they did there. Its just a playground. Its nothing serious... They just show off what they can calculate, not what is actually there. The physics now, at this moment, has no real definition for mass of matter nor it has a good (lets be frank, it has nothing) explanation on gravity, yet it praises E=mc2 like it was the Gospel. In physics so little is understood in terms of universe, in mathematics its even worse, its so confusing, that we all the time get predictions like: the universe might collapse at any second, universe is a hologram, pulsars are just fine with how are they described now (even tho they tend to change rotating speed by order of magnitude of several thousand resolutions per minute to just a few in matter of hours) etc... Its all just so childish.
Yeah but we know more about our oceans than about our universe
you do such a great job of explaining complicated concepts in a fun, relatively easy to understand manner- great job!
I love all your videos, they are very informational! Physics Girl
I've wondered about this for years! Thank you for doing this video!
I understood every single word she said, but when you string them together, nope.
Critical density is what she said
You are critically dense
@@nikoskabbadias plus one like for the kindergarten retort 😂
@@oWarlock360o Stop speaking German you NAZI.
Lawrence Lui...What is it you do not understand...As the man Scientist said...”It is Simple! .. “ He did not say that! Did He? Yep he said that! Now in plain language for you to understand.....”It is like tying shoe laces You try starting to the left, and then you go to the right, if that does not work then you go to the right and you go to the left, now because that does not work either. You shake it all about...and come up with the biggest mumbo jumbo imaginable! Now I hope You Understand, because we The Public are so gullible we believe anything....and then we find that Shoelaces are not required at all....because Where did they come from....? Oh well “It is Simple” He really said that! Who employs these people? RDR
I'm glad I finally found your channel, you make physics fun and that's the way it's susposed to be, thanks!
Great video as always. It makes sense. I have absolutely nothing to back this up with right now, but something feels a bit off. It will be interesting to see what we find in the future if we can use this to predict things as mentioned in the video. For some reason, this feels initially like the epicycles they used to justify a Geocentric solar system before the heliocentric model was accepted. It will definitely be interested to see what comes of future research into this.
Great explainer and good Guth segments!
This is so profound it’s difficult to even fathom.
If the universe is so flat, why do I still have to iron my shirts?
Madder Hat Flat=/= 2D
Ironed shirts are 3D, not 2D. I gUeSs YoU'vE gOt To StUdY MoRe
entropy
You iron shirts by choice.
his debunk level is over 9000!
wow! you are just so good at explaining these stuff.
Thank you so much for that clear und simple explanation. Struggled alot with that topic before this video.
Thanks Diana. You're the first person that successfully described what "flatness" means in a way I could understand. Nothing sweeter than the "of course!" moment you feel when you learn
Crazy how I can't understand what flat means all of a sudden. I'm thinking, "how can the universe be flat?"
I think her excitement is what makes me so interested in these videos. Anyone who is so enthusiastic about something will attract the attention of others. I particularly enjoy the cosmology related videos.
I totally agree with you. She has all that enthusiasm and energy, like it was during the big bang .........
That was not meant to be crude or derogatory, I like her, she's fun.
Beauty and brains...what's not to like?!
This young lady should be do tv programs .she is brilliant and makes it interesting with he contagious interest
Thank you so much for uploading this video. It is helping me get through the pandemic!
Curvature of 3d space would probably be so much easier to understand if we could draw/think with 4 spacial dimensions. It is easy for us to understand 2d but a 2d creature would have problems with it because it would only see lines/1d. I guess it's the same with us. We live in 3d, but see 2d. If we could go to 4d, we could see 3d space how it really is. Or our brains would blow up because it can't comprehend it :D
+Critical Ravi you sir know alot more about dimensions then most people do.
+Critical Ravi my brain is blowing up just reading your comment.
Undercover Wookiee C'mon, it's not that hard :D Just some simple analogies... :D If you're interested, watch the film "Flatland" here on YT, really helped me undestanding the dimension stuff :)
+Critical Ravi It's not at all hard to think in 3d. 1d is a point, 2d is a surface and 3d is area. You have to think outside the box... literally. Pun-ny huh!
Pecker Wood As far as I know, a point is 0d, a line 1d, a square 2d, and a cube 3d. And, as I said, we see images, think in words of course, or in images. We can see the whole square of 2d, while 2d beings would only see lines. Same with us. 4d beings can see a Cube from all sides at the same time, probably even the inside of it. We can only see and imagine 2d images of that cube, and our brain simulates distance of objects by lighting and size, and so on. I mean, I can't imagine how a 4d being would see a cube. It's just not possible for our brains, because we don't know the next direction. Assuming there is a 4th spacial dimension that is, of course.
Another interestin thing is, that we can only see one side of a "2d" paper. we have to turn it through 3d to see the other side, or go underneath it, assuming a levitating piece of paper. How would this work with 4d and 3d? If someone has an idea about this, feel free to reply :)
Let's not go shaming the universe about being flat, guys. It looks beautiful to me, whatever it decides to do.
Physics girl clearly has a great understanding of physics by the fast and succinct explanations. Very good communication skills too, someone untrained but interested in these cosmological topics, like me, can easily follow them. Some of these concepts I’ve never heard before but make the early universe a little clearer and interesting. Maybe you could be the next Brian Cox or Alice Roberts.
I just love this girl's brains and communication talents. And, she's great to look at.
Obviously not a thing wrong with the offerings of anything from SciShow to MinutePhysics, but it’s nice to be able to come to a video without knowing all the ‘why’s, ‘if’s, and ‘but’s beforehand. Only then to be profoundly awestruck at how much smarter all the commenters are than me! Very cool community, rallied about some very cool videos :)
Ps. I know I shouldn’t have been *abashed* but I was very distracted by your eyes… you’re not wearing coloured contacts, are you?
I know! I was warned about commenters when I started making videos, but I have found the comments to be insightful, constructive, and hilarious at times. It's great to see so much high quality content in education on TH-cam.
For some reason, the sunlight in my room makes my eyes look really weird in these videos. I haven't figured out how to fix it yet.
Just… please don’t be fazed when the trolls inevitably descend. I think this space is still sheltered under relative obscurity, something for which I’m both thankful and wistful. After all, you deserve more fans intelligent as these than TH-cam has to offer. ’Til then, I'm thankful for the community you've created :)
Now, now, as the Physics Girl, I’m sure you must have plausible explanations for the glare! I’m imagining the muscle fibres of your iris acting as a diffraction- upon reviewing a [very flattering (just kidding about, I promise)] frame at 0:26, I definitely overcomplicated things, ahah. Looks like the reflection of the window on your eye, with the camera where it is, perfectly covers your pupil. Maybe rotating your camera-backdrop setup relative to the window would help? It’s always difficult to get good lighting, though. Perhaps a diffuser on the window while filming? Even a large sheet of white tissue paper would do!
siddyrocks Interesting! I'll have to try the tissue paper. Camera work is not my strong point, so thank you for the suggestion.
Not a problem - always happy to help! I’m generally a candid photographer, so I don’t dabble much in artificial lighting. But I got my first flash a couple months back, which was very exciting and opened up a world of possibilities… promptly after which I sold my camera body to a friend *sigh* patiently waiting for Sony to launch a new full frame.
+Physics Girl "I was warned about commenters when I started making videos, but I have found the comments to be insightful, constructive, and hilarious at times"
*scrolls down to see much confusion about "flat" vs. "2-dimensional"*
Physics Girl, is there an SI unit of irony?
More seriously, kudos on an entertaining and informative channel. :)
If we have to give some math metaphor for this, Harmonic Series would be perfect. It is a divergent series but the expansion is slow.
Hey Dianna! Can you please tell us more about gravitational “push” and all that weirdness! I love your channel! Thanks so much!!!
I am so glad that at 62 years old I descovered you! I wish you were there when I studied physics 40 years ago!
There is a problem with this explanation: the expansion of the universe is actually ACCELERATING.
The logic gymnastics is boggling.
Don't upset the scientific community with facts. They don't like it when the facts disprove their foolish ideas.
as i understood, it is accelerating while decreasing the acceleration
like, now i am at 100m/s, then i am at 190m/s, then 275m/s, etc.
each step i'm faster, but the increase in the acceleration is getting smaller (+90m/s, +85m/s, etc)
Is this still valid? PBS Spacetime says that the universe is expanding at an accelerated rate, in contrast to this video. Don't make me go out and measure it!
That's what I was wondering as well.
Not just PBS, a lot of sources say it's expanding at an accelerated rate... This is the first time I heard it's not expanding at an accelerated rate...
I think it's true that the expansion of the universe is accelerating; but that's due to the effects of dark energy, which she didn't mention in this video.
I got a tape measure if you need it. 😀
Accelerated expansion of the Universe, yes. Hubbles Constant. Inflation was also accelerated expansion just at a much faster.
Wow that's awesome... Keep up the good work...
Deep video, great job explaining everything!
Why the hell this channel is not verified by TH-cam.. !!
IKR?
Cause she kinda needs a license...... or a degree... i forget now
She got a degree in Physics !!
Then she probably needs a license, let alone be more noticable on youtube *subs*
Verified by TH-cam? What's that matter? That's like giving someone credibility because someone stole their identity. Irrational.
3:25, "It will expand for ever but at an accelerating slower rate" but we know that the universe's expansion is acceleration so our universe should be open? Please explain!
yeah, that's what I thought...
Very nice explanation and cup of tea.
I’d always learned that the universe was expanding, and that this was accelerating, and galaxies were literally growing farther apart from one another... (e.g. observable via the Doppler effect). How does that line up with consistent mass density or flatness?
WAIT! What do you have to say about the accelerating expansion of the universe? Isnt that the opposite of what you said at 3:35?
Introducing Physics Girl (now in more frames per second)!
Is it noticeably different? My internet is too slow to tell...
Physics Girl It is to me. Looks smoother/more real-time.
"My internet is too slow to tell..."
Paging Elon Musk and his many satellites...
Physics Girl Yep, I noticed the higher framerate almost immediately.
Very interesting. Thank you very much.
As much as I like PBS Spacetime, this video was much easier to understand. Thank you.
Thank you universe for giving us this person
If the universe is flat, then why can I move upward?
What's "upward"?
Three-dimensionally flat.
You can't, you already live on the second floor.
None of that makes any sense. You can't call something that's three-dimensional flat. It kind of doesn't have only two dimensions.
RCapricot Yes you can. If you can connect 3 parts of space, add the inner-angles, and have them equal 180, it is flat.
Nice work PG! I think acceleration is the natural motion of the Universe and objects in it. Constant velocity motion would not be a natural occurrence for objects in motion..
You are the first person that has made the point of the Big Bang being a theory, something that scientists call a fact, even though they can’t prove it. Well done 👍 missy. I salute you.
Recent studies by NASA and ESA suggest that the universe is not only expanding but also found to be expanding 5% to 9% faster than thought earlier.
Shakil Khatri really? I wonder if it is expanding exponentially? Would that mean we are accelerating in time and space? Will our time be faster than past time?
It's an understandable misconception but when they say the universe is flat they don't mean 2-dimensionally flat, they're actually referring to 3-dimensional flatness, in essence a near perfect cube. Also it's kind of a mixture of certainty and generality, the orders of magnitude they're working with allow for near approximation where 99.9% accuracy can still be off by a lot. Also if you measure the density of light from a distant star over a sufficient period of time the change in brightness coupled with the constant speed of light can still give you a percentage rate of change even if your distance calculations are somewhat off.
Yes. She missed a major point in that the expansion of the universe is speeding up.
The universe certainly will "expand forever" according to observation and theory, even in a flat universe, and the acceleration will accelerate. Why does the intro say otherwise...?
+djayjp Clearly she must be a troll who has reached 368 thousand people and counting :/
connorp2402 Are you trolling? Seriously, why does she contradict herself in the intro?
+djayjp Yea, I was just joking. I was just trying to give her the decency trying to cover up that not only her but the producers of the video etc all made a mistake... But it's a pretty big one that not only is it wrong but no one seemed to have noticed before it was put up. Especially since her name is Physics girl :/
connorp2402 Exactly, couldn't believe what I was hearing :S. Would make me question everything else she says in other videos (making me not interested). And this was only the first video of hers I saw.
+djayjp That is if the universe is actually flat. We call it the observable universe for a reason, and that is because we base all our conclusion on what we are able to observe. Since we cannot calculate anything with infinite precision, we can't say we have not made a mistake. There is a possibility that the observable universe is just the surface of a larger spherical universe. This will support the multiverse theory. It could just be that like the earth's crust gets recycled in the mantle, the flat universe that we see is just being recycled through whatever is in the center of the 5th dimensional spherical universe.
God damn it. You exploded my mind. I had only just seen your video about the raisin bread analogy.
Great video! Please make a video explaining what "flat" in this context means! I also would like to know how those diagrams of the different shapes make sense in simple terms. Saddle and flat shaped to me is strange, for example is the universe on both sides of the planes and can u go over the edge? Thanks!
Dianna: Both edges of the universe have the same temperature.
Me: 𝐓𝐡𝐞 𝐮𝐧𝐢𝐯𝐞𝐫𝐬𝐞 𝐡𝐚𝐬 𝐞𝐝𝐠𝐞𝐬?? 𝐓𝐡𝐞𝐧 𝐰𝐡𝐚𝐭'𝐬 𝐛𝐞𝐲𝐨𝐧𝐝 𝐭𝐡𝐞 𝐮𝐧𝐢𝐯𝐞𝐫𝐬𝐞?
All these discussions are about the Observable universe. It is generally assumed that outside of it, is just more of the same.
Other universes in the flower of life pattern
Same same. it just had no chance to ever interact with us, so it is "out" of our universe.
@Rad Derry sure, why not? The big bang happened everywhere, not just where we are. Everything is in the centre of the expansion
Another edge???
I don't know if I'm in love with physics or with physics girl.
very very very informative and intelligent b.s.
Such a great job
no thing, is ever flat.
funny back in 56
+kleintjuhD An infinitely flat surface is infinitely flat
if it existed.
+kleintjuhD The Earth is flat.
uhmn... no. try again. youll get it!
A question, if we never calculated the one way light speed itself, isn’t it possible that light actually reached the other side of the universe and that light speed on a side is infinity and on the other is c/2?
I ask the same questions. We don't even know what the one way speed of light is.
Thank you I'm so glad I found you
Interesting indeed. Verrrrrrry interesting. It may take a while for a good description of higher dimensions in a well written theoretical proposal is produced. Then at least two more (5,6, and possibly even 7) can be detected in this existential plane. However, it is difficult work. But it is enjoyable if it is your passion. It's mine.
i thought the universe is accelerating in expansion?
In some beliefs
and i thought the universe is just a lint from god's belly button
+a pool player and i thought who cares? We are all gonna die anyways...
+LUIS V TON Not everyone dies at the same time, so every dies but at separate times.
+LUIS V TON buzzkill
Thank you, Lovely Lady! You are Brilliant!
From pretty much all other sources I've seen, I've come to the understanding that the universe's expansion is accelerating and that means that even if we had the ability to travel to other galaxies, those that are moving away from us (basically all of them) would be forever out of reach. I had also not heard that there was any consensus on the universe being closed, open, or in this case, flat. If the universe is actually expanding at an accelerated rate, that would seem to indicate that it is open and will expand forever until everything comes to a state of entropy. It seems that there might not be as much agreement about these things as I thought.
The only think the understand. But its only theory. Everything expanding? did the never hear about 2 galaxy's get 1 ? 🤔 if everything expanding that will be never posible.
Wait, I'm confused. I thought the expansion of the universe was accelerating.
th-cam.com/video/-4PayaEgEZc/w-d-xo.html
Yes but at a decreased rate. Pay attention
@@james3440 boomer
Mileyard Gigahertz it’s clear you don’t understand what your talking about. You can talk in waves if you want gigahertz. The rest of us will translate.
it burns.
She did not say why it was flat. She talked a lot about density. But no discussion of the geometry.
As I sit in my Lazy Chair and watch your videos I get flatter and flatter. Please slow down!
physics girl......that's exactly what i was just thinking a few minutes ago.
Physics girl is amazing. Beauty and brains.
If I understand there is *Flat Universe Society* ? 🤣😂😭
Tawe Lo ..No no no....A Flat Universe first...then the Flat Universe Society.....With Unlimited potential...for Expansion. RDR
I love your videos and your brain.
I have to agree with #IsaacNewton balance. All things in the universe from molecular reactions, celestial orbitals, and life in ecosystems, all across science we find an equilibrium with forces we don't understand.
Its amazing how many theories are posing as facts
like religious theory?
Theory in science is actually a fact or a way we interpret facts ;)
ram0l noooo, theory is an "Educated Guess" *based* on the known facts at the time. Theory is not deemed Fact (aka "Law") until it is proven to be so.
That look at 2:24 "How could've it expanded so fast?"
Welp, that's what she said.
Please make a video on "Relativity"🙏
I tear up when I think about space. This video has me bawling my eyes out.
I simply do not understand. I'm having trouble understanding how expansion can happen while the density doesn't change. How does the volume of something change wile the density stays constant unless it's getting filled by something?
That's a stupid question. The universe is being filled with naught but the dankest of memes, which is its true purpose.
That's exactly the right question, only in the flatness model does first law of thermodynamics hold mathematically, and yet the inflation is the flatness model that breaks it, but there is one more, if the energy can appear from ether why is it appearing at exactly the same rate for the universe to remain equally dense.
oh and there had to be something to effect the change in the speed of expansion, now you know why inflation is "highly debated theory"
Aleksandar Rajkovic jeez take a joke mate
also, this is where creationism seems more logical btw, if there is an ageless creator in the sky it makes more sense than a universe just 'appearing', you're right about matter having to appear for density to stay at an equilibrium. But think about this: what if the world was in fact created out of nothing, the monotheistic creation theories line up with inflation, so don't rule anything non-scientific out of your oh-so-serious debate. *nerd mode off*
Aleksandar Rajkovic the speed of expansion is directly proportional to the speed of light moving outward from a 'universal centre', you can see in the early time values that the rate of change is very fast, however an obvious trend approaching present is that the universe's growth rate of change is decreasing, but the actual increase in size is not changing, it's just that there's more initial universe to compare the growing universe amount to. But dank memes will never slow down, submit to the dank memes.
3:55 - That stick figure archer holds the bow like a physics boy!
This is incredibly interesting though I’m still no closer to understanding the origins of the universe🤔 it’s brilliant that scientists are still gathering & collating data from space telescopes. Science is wonderful ❤️
Your hair is so pretty, and you're really smart 👍😊
@Scientific Humanist Well, that's just not appropriate. It's very true, but not appropriate 🤓
nah this is too advanced for me at the moment
me to but I still wach it!
So if the universe is like a balloon stretching flatter over time, doesn’t that mean the universe is still round? But so big that we can’t see the curvature of space??
The universe is much stranger than we'll ever understand. I find it interesting that our universe is not only flat but rectangular as well. When it comes to computing, a two dimensional array is one of the easiest arrays to build and work with. Like some physicist propose the universe functions in part as a computer system, just much more dynamic and efficient than one we could ever hope to build and dare I say understand.
Wow! Instant sub.
2000 B.C. of course the Earth is flat!
2000 A.D. of course the universe is flat!
Did you mean....BCE AND THEN CE. Or The Flat beginning at 00...or 13,400,000,000 BC....BCE? RDR
'There is One who dwells above the circle of the earth, And its inhabitants are like grasshoppers. He is stretching out the heavens like a fine gauze,' - Isaiah 40:22
The book of Isaiah was written during the time period (778 - 732) BCE It refers to the 'circle of the earth' (as viewed from space) long before humans were able to view this for themselves by travelling up into earth's orbit. Further, the wording indicates a dynamic, expanding Universe (heavens)
“He stretches out the northern sky over empty space, suspending the earth upon nothing.”
- Job 26:7
The book of Job was written between (1473 and 657) BCE indicating a knowledge that the earth is suspended in space by an invisible force (gravity), contrary to some human myths that suggested an earth supported by pillars or resting on the back of a turtle (or other animals such as elephants)
Tony07UK ...Hmm....I prefer to think from a Holistic Thought store....Thinking for oneself nowadays seems less....and in the past only about 2000 BCE! Thinking suggests to me that there was And probably still is advanced technical skills that are endemic throughout 13,500,000,000 years of Observable effects. These Unlimited abilities are for us to discover on our Earth journey.....However much clearer your Awareness Perception Conscious Window is Becoming. If at all...Through Independent Thinking....Not Thought Which is only ever Of the Past. Thinking discerns what is Leftist processing or Rightist significant other, giving You a Choice from multiple choices...leading to Choices recurrently, Developing strident attitudes which control your Altitude! RDR
Kenneth John Kelly Hmm......The scroll....this would equal infinity......Repetition! But The Ultimate is more...more than Infinity! Unlimited which can equate only to Flat. Layers of flat Holistic Unlimited Spokes Flat packed Quantum dimensional Zero. Unlimited Nothing giving Everything Unique Oneness! RDR
@Kenneth John Kelly I do that every morning!
I feel like I know Physics Girl but I've never met her. Like I've met her dopplelgaenger or something
That was in a different universe. You know, the one where some of your dreams come true.
She looks alot like Blake Lively imo
I love you Physics Girl
She makes sense for a difficult subject to wrap our heads around. Thank you.
We know the universe is flat because the Flat Earthers think it's a sphere
th-cam.com/video/JUmsrpKu2mc/w-d-xo.html&start_radio=1
LOLMAO
*WHY DO THEY CALL HAVE TO CALL THAT FLAT!?!?!?!?!?!?!*
When I search shape of universe, I wanna hear ball or cube shape, not flat! Why they can't call it the EXPANDYNESS of the universe!?
Yeah, its like when they say "dark" matter. They should call it invisible matter. If it were dark, and it is most of the matter in the universe, then we wouldn't be able to see anything. Who names this stuff?
You know what I always wondered if I had got a talented sister like you who loved physics so much as me , then I would have been the luckiest person on earth...
Perfect video
"not expand forever"? I thought that the expansion is even accelerating!