If the universe is only 14 billion years old, how can it be 92 billion light years wide?

  • Publicado el Hace 3 años

    FermilabFermilab
    suscriptores: 665 mil

    The size and age of the universe seem to not agree with one another. Astronomers have determined that the universe is nearly 14 billion years old and yet its diameter is 92 billion light years across. How can both of those numbers possibly be true? In this video, Fermilab’s Dr. Don Lincoln tells you how.
    For further information, see www.fnal.gov

Ed Vincent Calaguas +1813
Ed Vincent Calaguas

So basically he is saying that we will never ever know how really big the universe is. It’s because we can’t see anything that is beyond 15Billion light years due to the expansion of universe is faster than the speed of light. The fact that we are loosing 20k stars per seconds on our line of sights speaks how fast the universe is expanding. This is very fascinating!

Hace 10 meses
Gol D. Roger
Gol D. Roger

@Norman big bang can't stand to itself you didn't know that? Something from nothing without any reason or driving force? That's make no sense at all.

Hace un mes
Gol D. Roger
Gol D. Roger

@Wolfgang what are you talking about? You can't even explain your argument. You are just ranting.

Hace un mes
J McD
J McD

@Solitaire Guillaume Real wisdom is to know the extent of your ignorance: be humble old chap.. this is a discussion, an exchange of knowledge - you are looking for an argument: an exchange of ignorance..

Hace un mes
Solitaire Guillaume
Solitaire Guillaume

@J McD step outta here, the smart people are talking. Take your 2,000 year old nonsense and sit in the corner

Hace un mes
Arrow
Arrow

Yeah , on the same note we will never know how OLD the universe is. since its metric expansion of Space-time , not just space, but time also fluid over different scales, there will be chunks of the universe where time moves faster or slower relative to us. the CMBR measurements come back to 15 GYa only because events that happened before 15 GYa are beyond our perceptive horizon. The Fact that we see nearly fully formed primordial Galaxies/quasars even at the 13.6 to 14 GLy horizon suggests as much , We think the universe is 15 Billion years old or less only because events or occurrences from before that have gone beyond what we can see, maybe black holes in active galactic centres destroy matter and information into tachyonic component ( darkness/voids) and visible components - relativistic jets. After all if even light cannot escape the gravity of a black hole , things close to the event horizon would be moving at nearly the speed of light and things that crossed into the event horizon would be 'falling'/accreting into the black hole at faster than light speeds - at which stage such 'matter' cannot be decelerated - thus likely giving rise to metric expansion - which is basically dark energy voids growing ever larger.

Hace un mes
Sohel Ibrahim +5
Sohel Ibrahim

Some thought experiments: 1. If the expansion of space abruptly slows down or even stops, will we feel or detect a force due to this deceleration? If yes, will it be a linear force, given the detector is off-centre of the universe? Or will it detect compressive force no matter where in the universe the detector is? 2. With the expansion of space, the fundamental particles of matter should also expand or at least continue to lose energy to work against the expansive force in order to remain at the same size?

Hace 23 días
Pog Tuber
Pog Tuber

Definitely don't quote me but I believe this is resolved by the strong, weak, and electromagnetic forces of physics to be much stronger than any effect of an expanding universe. We don't "change size"

Hace 12 días
freedomXforce +1
freedomXforce

Seems to me given the area the universe is encompasses today it would be very hard for it to be expanding slower than it did shortly after the big bang.

Hace 25 días
Michael Cohen
Michael Cohen

Don, these vids are brilliant. Questions like this one have always bothered the hell out of me (like this one, or the apparent change in the speed of light through different transparent media). I was just resolved but not happy that answers would not be available 'cause it appeared I was the only one asking these questions. Take a bow man, this is a huge service to myself, and now I can say, all of nerd-kind. Much appreciation.

Hace 2 días
Citizen Sane
Citizen Sane

Dr. Don, Thanks. An excellent video and lecture. Good, you said visible universe. There may be more big bangs we are unable to see. I believe there is no boundary of universe. If it is, what is behind that wall? I think universe is make and break. Transforming every moment and there is no beginning of or end of time, it is a cycle.

Hace 8 horas
gregg hillier +2068
gregg hillier

if everybody leaves their toast in for 8 minutes....this could account for most of the dark matter in the universe

Hace un año
periklis spanos
periklis spanos

@Reasoner Enlightened they have no tdea it’s all theories behind a desk

Hace un día
Gerald Dixon Cummings
Gerald Dixon Cummings

@Amit Kumar but it's trudeau.

Hace 2 días
Daren Miller
Daren Miller

I’m so happy this is the first comment.

Hace 3 días
William Freimuth
William Freimuth

Classic explanation for why scientists have yet to adequately present the #climateEmergency …in simple terms.

Hace 6 días
Al Woolhouse
Al Woolhouse

Explicación perfecta, gracias. Me he suscrito.

Hace un mes
bseddonmusic1 +1
bseddonmusic1

If it takes time for parts of the universe to become visible from earth (as an example location not geocentrism - feel free to pick your own) and it's expanding so parts that can be seen in one instance will be unseeable in later instances, is there a time to live or have lived that it is possible to be able to see the most numbers of stars or galaxies?

Hace un mes
Alex Humble
Alex Humble

The mistake of this lecturer is that he assumes space is straight, but it is not the fact. Before the Big Bang there was nothing. In other words matter, space and time did not exist. Then in this nothingness all three appeared and space started spreading with following processes. Space has been not only curved, but also closed within itself. Now we cannot see the curvature of space because it is too big. It is the same, as we cannot see curvature of Earth while we are on its surface. The original microwave emission or “relic emission” can be registered because it circulates within space. It always flies away and comes back. When you go straight around the Globe you eventually come to original point. It is similar to space. There is nothing beyond space as it was before Big Bang and nothing material can get out of it. A black hole is a tiny example of space in the beginning of Universe. This model at least explains the entire subject, but the lecturer is wrong when he tries to intrude his idea. “If you looked strait through strong enough telescope you would see your back”, Einstein predicted. Now this can be proven. There is also a philosophical aspect of it. If matter, space and time did not exist and then all three suddenly appeared then there must’ve been original cause. What cause could be there, but God? 1:1 In the beginning was the Word, and the Word was with God, and the Word was God.

Hace 28 días
Ian Smith +1
Ian Smith

@Chris Lichowicz No you won't! As others have stated, much of the universe is impossible to see because, due to expansion of the universe in it's early days, it would take longer than the age of the universe for light to arrive from objects that distant. Doesn't matter how clear the skies are.

Hace un mes
Chris Lichowicz
Chris Lichowicz

Just go out to the desert. The clear night is absolutely amazing! You'll see everything!

Hace un mes
John Whorfin
John Whorfin

not real bright are ya. have another cone and go to work tomoz. only hundreds of years of astronomy v billions of years of expansion.shit it boggles me why we still spend enough mun to solve world hunger to space lol

Hace un mes
EliasAlucard
EliasAlucard

Liked and subscribed! Keep up the good work!

Hace un mes
Battyman
Battyman

Brilliant! I have always thought that the big bang may have happened in our part of the universe and that this part is an outlier of the actual universe that is not visible to us. So the universe was not created by the big bang, only our part of the universe was involved in the big bang. The rest of the universe has always been there and we will never be able to see it as we are moving away from it at massive speed. Maybe in the far future our part of the universe may travel to another cluster in the main universe and our night sky will fill again.

Hace un mes
Alex Humble
Alex Humble

The mistake of this lecturer is that he assumes space is straight, but it is not the fact. Before the Big Bang there was nothing. In other words matter, space and time did not exist. Then in this nothingness all three appeared and space started spreading with following processes. Space has been not only curved, but also closed within itself. Now we cannot see the curvature of space because it is too big. It is the same, as we cannot see curvature of Earth while we are on its surface. The original microwave emission or “relic emission” can be registered because it circulates within space. It always flies away and comes back. When you go straight around the Globe you eventually come to original point. It is similar to space. There is nothing beyond space as it was before Big Bang and nothing material can get out of it. A black hole is a tiny example of space in the beginning of Universe. This model at least explains the entire subject, but the lecturer is wrong when he tries to intrude his idea. “If you looked strait through strong enough telescope you would see your back”, Einstein predicted. Now this can be proven. There is also a philosophical aspect of it. If matter, space and time did not exist and then all three suddenly appeared then there must’ve been original cause. What cause could be there, but God? 1:1 In the beginning was the Word, and the Word was with God, and the Word was God.

Hace 28 días
Chasya Bernstein
Chasya Bernstein

@theThinkerator Absence of proof is not the same as proof of absence - basic principle of science (and law, as well).

Hace un mes
theThinkerator +1
theThinkerator

@Troy Fergus There is no proof of a god or God's existence the universe, life, etc, is all happenstance, and when we die, that's it for us and I'm Ok with that

Hace un mes
Joshua Lee +2061
Joshua Lee

Basically space is expanding so fast it’s decreasing our render distance

Hace un año
Glaufx Garland and Eleni von Mondlicht -Γλαύκωψ
Glaufx Garland and Eleni von Mondlicht -Γλαύκωψ

@Amit Biswas we don't know even after thousands of records books what was ancient Helleinic and Egyptian civilization and others, most of the "scientsts" they don't remember what food they eat a year ago how about the "size" of space - expanding, black holes other dimensicions etc are bad jokes

Hace 3 meses
Amit Biswas +1
Amit Biswas

Lol what did you say! "Space is expanding?" Science still have no idea about object-less space or wave-less space.

Hace 3 meses
Oscar Hedden +1
Oscar Hedden

If it's expanding what is it expanding into?

Hace 5 meses
Eu29 Lex
Eu29 Lex

More pseudo science

Hace 5 meses
Joel Xue
Joel Xue

The key for me to understand what he is explaining is to remember the light year is a distance measure, not a time measure.

Hace 14 días
Din
Din

Not exactly, because when you hear two light yrs, you know exactly the length and the time..

Hace 6 días
Charlotte Dillon
Charlotte Dillon

Serious part: Video needs a prequel (maybe I missed it) on the nature of space. Most people envision it as an empty vacuum with no structure, so it's hard to conceive of it expanding. Possible sequel: The Big Rip Theory? Less serious part: Is it possible for the comment section to expand at more than 300,000 replies per second or would that violate some deep scientific principle.

Hace un mes
Rick Schofield +3
Rick Schofield

It’s fun to think that the stars you look at in a telescope may have become a supernova yesterday but we won’t know it for several thousand years

Hace un mes
Dan B
Dan B

Or.....so THEY would have you believe! but How do we know that THEY'RE right? Who's going to argue?

Hace un mes
indiason +6
indiason

There are two twists in the theory of an ever expanding universe I just thought of: 1. The expanding universal edge is one property that probably travels faster than the speed of light. At the big bang and thereafter, space has been expanding at an incalculable rate and, indeed, speeding up. Light cannot be at the edge points between "new" space and "no" space. If it were, then it would violate causality. In the moment of creation, that new space would be completely black. The only radiation present would be background cosmic radiation. Then at some future point, as time would have to(unless there's some quantum trick to spacetime that was just created having the same timestamp as the restnof the surrounding universe) begin after that section of space was created, a "new" section would experience other types of radiation which would eventually penetrate that section of new space. OR 2. Matter and light, and/or dark matter and something else equally exotic, are already at the edge and "laid down" multidimensionally as the universe is expanding. Like a growing shell. Nothing says this boundary needs to be a perfect sphere. And nothing to our knowledge indicates that this edge is growing exactly the same way at every point of the periphery. If either theory holds merit, what ramifications will it have on our present understanding of physics and reality?  Additionally, spooky action at a distance is another example of the light barrier not holding when we percieve the universe through the dimensions we can currently understand. Try this thought experiment: 100 years after the big bang, how big was our universe? At the boundary of this brand new 100 year old universe that's expanding, the very edge, what do conditions look like? As each new spherical section of universe is expanded into, does time start at zero for that section? So, t=100 years at the core, but is it t=0 at each edge point created? At what speed is this early 100 year old universe expanding? Does quantum space behave in exactly the same manner as it would now, long after the section of space we are in was created? For each new section of the universe expanded into, do all the laws of physics we know hold true instantaneously or only as that section changes with time? Within this thought experiment, think about what quadrant of the assumed sphere of the early expanding universe would Earth have eventually developed in. Is that section close to the core where it all began, even with space itself expanding, or far from it? Keep in mind, we have no idea how big the universe actually is. We may never know. Second thought experiment: is the expansion of space ongoing at every point in the universe or is expansion occurring only at the periphery? If spacetime is stretching everywhere, why can matter be stable in any part of the universe and form organized structures?

Hace un mes
Brian Mize
Brian Mize

this is a good observation, from a person that knows how radiation works, there has to be a thing that is emitting the radiation, it doesn't just 'happen', and it usually only sends out that much that is needed until it is not radioactive anymore. there should have been a point at which the radiation ceased.

Hace 29 días
indiason
indiason

@Ivano Stellato hmmmm.....no need to be insulting. You disregard some fundamental realities in your response. If the universe started with an equation as you say, we will not understand that equation until far into the future when our understanding of the constants we use to define many parameters are refined to a far higher level of accuracy. And there's the whole pesky aspect of how any single equation can account for all that followed the actual big bang. Not to mention that we don't understand what existed prior to the big bang. Second, spooky action at a distance is another example of the light barrier not holding when we percieve the universe through the dimensions we can currently understand. Try this thought experiment: 100 years after the big bang, how big was our universe? At the boundary of this brand new 100 year old universe that's expanding, the very edge, what do conditions look like? As each new spherical section of universe is expanded into, does time start at zero for that section? So, t=100 at the core, but is it t=0 at each edge point claimed? At what speed is this early 100 year old universe expanding? Does quantum space behave in exactly the same manner as it would now, long after the section of space we are in was created? For each new section of the universe expanded into, do all the laws of physics we know hold true instantaneously or only as that section changes with time? Within this thought experiment, think about what quadrant of the assumed sphere of the early expanding universe would Earth have eventually developed in. Is that section close to the core where it all began, even with space itself expanding, or far from it? Keep in mind, we have no idea how big the universe actually is. We may never know. Second thought experiment: is the expansion of space ongoing at every point in the universe or is expansion occurring only at the periphery? Of spacetime is stretching everywhere, why can matter be stable is any part of the universe and form organized structures? I am not a physicist, which is obvious, but that doesn't stop me from thinking...

Hace un mes
Ivano Stellato
Ivano Stellato

ur comment is comic ... everything travels faster than light ... black is not devoisZion ... thinQ in terms of relative perception and quantum conditioning, this universe started on an equation as do each of your steps, your lives or your thoughtsz

Hace un mes
james Somerled
james Somerled

I agree.. I don’t understand why people think the speed of light is an absolute barrier

Hace un mes
Nonso Okoye +1260
Nonso Okoye

Who else or is it just me who enjoys topics as this, but really understand very little at the end? Lol

Hace un año
Robert Daley
Robert Daley

“It’s life ,but not as we know it Jim”.Spock to Capn Kirk.

Hace 4 días
James Maybury
James Maybury

I agree and think that the presenter is a very poor presenter.

Hace 11 días
Udaya Kiran
Udaya Kiran

You're preaching to the choir brother

Hace 14 días
Thomas Atkinson
Thomas Atkinson

I have some questions about the "big bang". (genuinely interested in answers, not to argue). 1. When we look at distant galaxies that we say are "further back in time" due to how far away they are, and then we are told that these distant universes are "older" meaning the light we receive from them took so long to get to us from there that we can literally see back in time to the big bang. How is it that we can apparently see back to the origins of the big bang? If everything is expanding outward, and space itself is expanding (carrying us with it) faster than the speed of light, how is light then able to reach us from back in time when the big bang happened? 2. It is said that the big bang didn't happen in a "location" in space, but then I hear the same people also say that everything was once contained at a single infinite "point" prior to the big bang and then "BANG" everything that was contained in that single point is now shooting through space at incredible speeds and even space itself is expanding outward... Why do physicists say everything was once contained in a "single point"? How is it possible for a "point" to exist if spacetime itself was contained within that point? 3. Why do physicists say that the distant galaxies we see are "old" in the sense that they represent a time closer to the origin of the big bang? I understand the concept that the light we see from distant galaxies takes a very very long time to reach us, which means the light we are seeing is what that galaxy was like when the light first started traveling toward us, but how does this mean that the "old" galaxy we see has anything to do with the origins of the big bang, and how could we possibly measure how close that is to the origins of the big bang? 4. If we are moving with space at a greater speed than light (because of space itself expanding) this means that there are galaxies moving away from us that we will never see because the light will never reach us unless we one day learn to fold space ourselves, so we can't measure how vast space is exactly. Heck, some say space is infinite. How could we ever possibly know the origins of the big bang if we can't measure space? 5. How could we possibly tell that "the universe" is expanding "outward" if we can't actually measure the size of the universe in its entirety? Is it not just as likely that space (if its finite) outside of our observable universe is trillions of times bigger than our current observable universe and as a whole isn't actually expanding outward, and what we see isn't the whole story? For example, I could observe the atmosphere here in Australia and I could theoretically (with enough data) predict how the weather is going to behave long into the future, but if my observations were confined to the atmosphere within/above(?) Australia only, and I could not observe the outside world, It is not possible to predict the weather long into the future because it is only a small part of what is happening on a larger scale. Is it possible that the expansion of our current observable universe is just a small part of what is actually happening on a much larger scale outside of what we can currently observe? Isn't it just as likely that galaxies outside of where we can currently observe could actually be expanding through space toward us, as the "Big Freeze" theory that we will just continue expanding outward and eventually just fade into darkness?

Hace un mes
Clinton Reisig
Clinton Reisig

Every year, new discoveries of galaxies farthest from our own are made 👍

Hace un mes
Michael Lonergan
Michael Lonergan

Mind blowing! Now if someone could only explain to me where the Moon goes when we can't see it at night? ;)

Hace un mes
Classical Physics
Classical Physics

The only reason we have the BBT is because when in the late 1920’s Hubble recorded a relationship between distance and frequency he noticed that light appeared to decay in frequency the longer it travelled in distance. But Einsteins fantasy of the photon model from 1905 had by then taken hold and Hubble had to reconcile the fact that his observations that light frequency decayed over distance contradicted Einsteins photon model. Which fantasised that it did not change frequency over distance. Hence the pre copernican BBT model. An excuse to cover the fact that Hubbles empirical observation ruled out the photon model. The funny thing is how BBT supporters pretend that tired light models will result in loss of energy!. Pure nonsense from pseudoscientists.Notice that in fact...A beam of light with wavelength range of 100-200 nm when emitted, has the same energy as when it is redshifted to 200-400nm

Hace 22 días
Nurpus +1737
Nurpus

I swear this man has a body language of a quest-giving NPC

Hace 2 años
Dung Huynh
Dung Huynh

@A Brit Abroad skip. Skip. Skip

Hace 15 días
herecomethelizards2
herecomethelizards2

If we accidentally kill him, does he respawn?

Hace un mes
Himanshu Sukhpal +1
Himanshu Sukhpal

And I desperately want to go in the adventure he is putting forth

Hace un mes
Jim Readey
Jim Readey

@Simon, i’d say that’s about right.

Hace un mes
1MANVSWORLD ! +17
1MANVSWORLD !

The whole big bag theory is based on the "observable" universe. You can throw whatever number you want at it, but if you cannot find the end it will always remain an unknown.

Hace un mes
Ed Machale
Ed Machale

Fair comment

Hace 5 horas
Duane Oestreich PhD
Duane Oestreich PhD

Same with Drake Equation!!!

Hace 10 días
Rondo2ooo
Rondo2ooo

And if works for what we know. If an unknown event happens that is not explainable with our current knowledge, it could through over all or many assumptions we made based on existing observations and calculations.

Hace 28 días
Peter W-ski
Peter W-ski

Is universe expanding faster than speed of light? Otherwise how did it get from 42M light years to 42B light years away if it's only been 13.7B?

Hace 23 horas
Andre Luiz
Andre Luiz

The best explanation that I have heard about! Congrats!

Hace un mes
Pillar Service
Pillar Service

What if we're looking around in a circle, wouldn't that make something seem a little farther away than it actually is...

Hace un día
Jeff B +485
Jeff B

You say “Nothing travels faster than light.” However, I recall from Doug Adams’s “Hitchhikers Guide to the Galaxy” that their spaceship was powered by “bad news” because “nothing travels faster than bad news.” Of course, wherever they went, they were not welcome. Thanks for the clever video.

Hace un año
iCost Hop
iCost Hop

😅😂😂😂😂 🤣 Nice

Hace un mes
Tony Mackley
Tony Mackley

@Laurence Borden A Pan-Galactic speed, so the tail goes..

Hace un mes
ian Jones
ian Jones

Spot on explanation , but when will get a cgi remake of hitchhikers guide

Hace 5 meses
Edbrad
Edbrad

😂😂

Hace 5 meses
John Schuchert
John Schuchert

So we get light from things that are 15 billion light years away although light didn't have enough time to travel to us from there, because they didn't exist 15 billion years ago. Yeah, that makes alot of sense.

Hace un mes
Hongo Tedesco
Hongo Tedesco

Keep it up! This stuff is great.

Hace 4 días
S MacLaren +6
S MacLaren

A superb, but still quite mind-boggling explanation from a master communicator. Excellent. Thank you. Whether one believes there was a real big bang from a singularity from which chaotic and extreme event came order and life (with or without a Creator designer), the current observation of the expansion of the universe is quite a challenging thing, but this puts the facts on the table in a way that most people will now understand.

Hace un mes
jdang307
jdang307

I don’t believe it was considered a singularity. He has a good video on the Big Bang.

Hace un mes
RFeeOC +1
RFeeOC

So if and when we do accomplish traveling near the speed of light, which we won’t, after one year and one trillion miles~, we still haven’t gotten anywhere! Awesome. This stuff isn’t freaky at all!!

Hace 4 días
alsojuja +357
alsojuja

That was a very clear, lucid video. I might add that "expansion of space" means the expansion of space itself, not just movement of objects away from you. I think of space as an invisible fabric in which all matter is embedded. Expanding the fabric is like stretching it, making the objects in space get further apart even if they aren't moving with respect to space. Light is like a bug walking along the fabric at a constant speed with respect to the fabric. Because the fabric is being stretched, the bug might walk for a billion years towards you yet only end up a million light years closer to you than before, kind of liking walking down an up escalator. If the bug is far enough away when it starts traveling towards you, it might never reach you. The weird thing is that there is such a thing as being still with respect to space. Under the Theory of Relativity, no reference frame is absolute, but there is such a thing as "stopped" with respect to the fabric of space. The Milky Way galaxy is moving at 2.1 million km/hr with respect to space, like it's slowly crawling along the fabric.

Hace 10 meses
Matt Bonneville
Matt Bonneville

Excellent use of insect on an escalator analogy. 😃

Hace un mes
Jack West
Jack West

I like the bug explanation. So as the bug travels to further outer space is it getting larger too? So the earth is expanding is it not? Everything is getting larger and going faster due to dark matter expanding right? Were on a giant cosmic dark matter space ship. WOW By the way I have some beach front land in Arizona "getting larger" for sale cheep. Any one interested? Lucid dreaming is now dark matter of fact.

Hace un mes
ANDROLOMA
ANDROLOMA

@alsojuja I like your ant analogy. Here's mine, about gods: #1 Inspect an anthill. Any anthill. #2 Choose an ant at random. Any ant. #3 Ask yourself: "What can I do to get this ant to believe in me? To worship me, to praise me, to pray to and sacrifice to me?" #4 Then ask yourself: "Why am I asking such stupid questions?" #5 Then ask yourself an intelligent question: "If I'm so much more advanced than any ant, and I don't care what it thinks about me, then how much more so would any sentience capable of creating universes care about what I think?" #6 Then go about your way confident in the sensation that you've chided yourself successfully.

Hace 2 meses
ANDROLOMA
ANDROLOMA

@alsojuja If there really is a god called God, would he/she/it call himself/herself/itself God? Or would it pick a less conclusive name for itself?

Hace 2 meses
alsojuja
alsojuja

Correction: The stick must get longer at an increasing rate for the ant not to reach the far end. If the stick gets 100 ft longer each day, the ant will eventually reach the end no matter how slowly he is crawling. But if the stick gets 100 ft longer on the first day, 200 feet longer on the second day (so 300 ft total), and so on, the ant might not be able to reach the other end (I don't know the exact numbers that would prevent the ant from reach the far end; obviously light from nearby objects does reach us).

Hace 2 meses
Ted Jenkins +2
Ted Jenkins

I understand (?) the theory is that the universe itself (including its space) expanded during "inflation" at faster than the speed of light. This idea (plus the observations of "quantum entanglement)" suggests to me that the science of physics is "on shaky ground". Progress continues!

Hace un mes
Patrick S
Patrick S

It's not shaky. It's totally fabricated to give the amount of time supposedly necessary for evolution.

Hace un mes
Ace Ace +1
Ace Ace

Without watching the video I can think of a few possibilities. One space expansion is faster than the speed of light. Two we can't possibly be able to measure the entire amount of space. Three the Earth isn't the center of space.

Hace un mes
Ace Ace
Ace Ace

@Jason Chang - Isn't that what I wrote? I just wrote Earth isn't the center.

Hace un mes
The Devil's Advocate
The Devil's Advocate

It’s Relative motion. Space time is expanding

Hace un mes
Jason Chang
Jason Chang

Earth isn't the center of space, and nobody should believe so. It's the center of "space" to us, because we're on it. An alien on a planet 100 billion lightyears away would have their planet as the center of space to them.

Hace un mes
Blue Boy
Blue Boy

Great content to put into frame where we are at. In the 90s I remember the fever pitch of approaching the prescipiece of the final level of required observation to claim the highest of all enlightenment. Then it felt like it was falling apart untill all understandings being equal resolved that we realy can only know fuckall. And so turning inward we went to town down and down to the power of ten on it went and it got just as exciting until it started getting weird after the 2000s now were considering that we are approaching the limit of phisics for all there is big and small but what that means is big and far or near and small we have an endlessly deep feild of scope for all things that are within observation. Therefore we have to assume there must yet be unasked questions. Galore. Im sure we will stumble into them doing things we know some little about as these actions still and evermore beg more question than our objective answer. The new kids will instinctively ask weirder questions as more come to understand how truely weird matter is. I expect the last exploreable frontier will be consciesness since its one of the more awkward and sometimes icky subjects but since theres an opportunity for clever animals to eek out a living if only they can work inner knowledge of it to their benefit which we know is already happening I guess AI will have better luck breaking ground than some poor sap thats kneecaped in that race by the screaming consciesness banging between their ears. Science is about to get weird. So far we have to conceed base reality is a badly stuffed animal, well worn filled with some magical shit some cotton wool and much of what we can never know... or We are not in it. The universe is badly made and full of holes and certain to tatter away in so many ways to our perspective while at the same time being supremely perfect and precise and clever since its conception. Id love to know what happens to those dead iron stars at the end. Can they traverse the emptie patches or remain matter beyond the light universe. Is the universe simply a foundry for printing matter for some purpose remote from within this space. It would make as much sence. You make a great summary to frame where to start for thinking for the new school to come. This isint the end of observation. Were just finding the front door from the inside and theres a whloe world beyond that boundary and people have no respect for such things. BTW 8min is too long to toast bread slices in a flash electric toaster and that toast was toast. Id still hit it with black coffee thou. Do you work for CERN? If not they may have some use for that toaster. Much more compact than all those tubes and magnets to convert shit into different shit and make dark matter.

Hace un mes
Ronald Walton
Ronald Walton

The size of the size is only relative to the size of comparison to the size. If our Solar System were a molecule what would it be ?

Hace un mes
David le Viseur +22
David le Viseur

Thanks for this video! It took me years and countless fruitless discussions with astronomers & physicists to wrap my head around this conundrum on my own. Your video, had it existed back then, would have resolved my puzzlement and confusions in less than 10 minutes! I hope it does that for other & future people! The value of such a clarification is immeasurable! Thank you!

Hace 3 años
Sixteen Minute Church +2
Sixteen Minute Church

Very interesting! But if nothing travels faster than the speed of light and the universe is 14 B years old, how can there be anything beyond the radius of 14 B ly? Wouldn't that mean that whatever exists beyond the 14 B radius has travelled there from the Big Bang faster than the speed of light?

Hace un mes
ian ian-Pringle@hotmail.co.uk
ian ian-Pringle@hotmail.co.uk

The premise is, nothing "within" the universe travels faster than light so stars and galaxies that are furthest from us will travel at the same speed as the universe expansion and will eventually be beyond our view as their light will never reach us.

Hace 25 días
david anderson +1
david anderson

The theory is space itself, ( whatever that is) is expanding. They observe this in the "Hubble Constant", the further an object is away from us, the faster it appears to be retreating, causing a red shift in the light spectrum observed. What I have not heard explained is how do they know they are not observing how fast space WAS expanding when said light left those stars millions and billions of years ago.

Hace un mes
BMW M5 E39
BMW M5 E39

4:40 ..quick math (maybe wrong)... so if 42 million light years distance when light was emitted, but took 13.7 billion light years to get here... This would mean that say Andromeda galaxy that is 2.5 million light years away (~5.9% of distance of 42 million light years), should be at minimum 5.9% closer to us than what we are measuring at 2.5 million light years?

Hace 3 días
David Matumbike
David Matumbike

What if we are there were many iterations of the big bang with expanding universes slipping out of viewable range with each expansion?

Hace un mes
justsoification
justsoification

Unless I ve missed a point the expansion of space is much faster than the speed of light

Hace un mes
RIPZatren +76
RIPZatren

Losing the visibility of over 20,000 stars a second due to the expansion of the universe... MIND BLOWN! and JAW DROPPED! I didn't know such a thing, and now I do.... Keep up the awesome work guys, wish I would have found this channel sooner.

Hace 3 años
Richard Munsch +1
Richard Munsch

I would be interested to see proof that we've observed these disappearances. It seems like it's only been calculated that we SHOULD see these disappearances. In other words, until what he said is proven, it should be taken no more seriously than i-ching and other forms of divination. If our predictions of galactic motion are anything to go by, our present level of science is still not much better than divination.

Hace un mes
Airborne Puppy
Airborne Puppy

Not sure how this can be true if those galaxies cannot exceed the speed of light though.... If a basketball cannot blink out of existence by exceeding the speed of light, how can a galaxy?

Hace un mes
Paul Frederick
Paul Frederick

Out of sight, out of mind.

Hace 2 años
olivinator
olivinator

@Ian Home the stars that you see with the naked eye are only the closest and brightest stars around us, you'd need an extremely powerful telescope to see the stars that'll pass beyond this boundary within our lifetime. also, for a star to stop emitting light, it'd have to either stop existing or turn into a black hole.

Hace 3 años
Danelius90 +1
Danelius90

Just think, in the distant future no other stars may be visible (we'd need to move first!) so astronomers could conclude that there are no other stars, despite "ancient texts" saying so. Because who should they believe, their modern technology or our primitive equipment?

Hace 3 años
Mike Morris
Mike Morris

If we are seeing light from millions of years ago,some less,how do we know it still exists anymore? In any shape or form?

Hace un mes
Lee Mason
Lee Mason

We don’t know…

Hace un mes
David Henderson +1
David Henderson

As for the ago and size of the universe I have always felt that we have it wrong. I feel it is hundens if not thousands of time older and larger than we think. What we have now if just our best guess based on what we know or at least think we know.

Hace un mes
Richard Munsch
Richard Munsch

And what we think we know is based on assumptions and fudge factors that try to cover for the discrepancy between observed galactic motion and predicted galactic motion. Any neutral scientist knows we're wrong, but many people, scientists included, feel compelled to defend their faith in their favourite hypothesis.

Hace un mes
Craig Roberts
Craig Roberts

How do you know the Cosmic Background Radiation was emitted from a distance of 47M light years away?

Hace 11 días
Arrivals Band
Arrivals Band

Always funny to see a demonstration of the big bang by a giant flash and explosion from far away. It took millions of years before photon existed after the big bang so we could not have seen the explosion, in Space there is no sound so we could not have heard it and certainly not at the same time as the beginning of the expansion of the universe and since time did exist before the big bang so space could not have existed either so we could not have been far away. The graphic demonstration needs to be more accurate.

Hace un mes
Phillip Probst +24
Phillip Probst

These are the kinds of considerations that I wonder about whenever I see reports of astronomers “mapping” the universe. There is, of course, an inherent distortion in our view of the cosmos as a result of the light speed limit. You observe an object 100 light years away and derive its location 100 years ago. You then observe an object 1,000,000 light years away and derive its location 1,000,000 years ago. Ergo, the locations are not contemporaneous. I never hear any discussions of attempts to “normalize” the plotted locations to unwind the temporal distortion such that the map represents contemporaneous locations. Is such a thing even possible? ... or meaningful ?? ... or even worth the bother ???

Hace 3 años
Number 6.
Number 6.

No it is not. You do not have space or time standing alone or in isolation. There is only spacetime. Space is time, time is space. As in, the store is 5 minutes from here.

Hace 5 meses
Mouse GrayEagle
Mouse GrayEagle

I believe the best analogy to your question would be giving you a pencil and paper, sending you to the top of a mountain in South Dakota and asking you to give the exact location of every grain of sand on a beach in Florida but not as the beach is now, rather as the beach was before several hurricanes had hit that year. There are some computer programs powerful enough (supposedly) to tell us what certain constellations and stars visible to the naked eye looked like a few thousand years ago from "ancient" earth, but for all the "stars" (as most lights in the sky are not individual suns but nebula, galaxies, etc) most are not visible without magnification and no computer I am aware of has the raw power to compute the gravitational influences of that many objects, let alone what may exist outside the visible universe.

Hace 3 años
Brett
Brett

This is where the cosmological constant comes into effect. Because the cosmological constant is constant we can calculate the positions of objects at any given time and the results will remain congruent.

Hace 3 años
xia en Gao
xia en Gao

That's called lookback distance, how far the light-emitting object has traveled while the light has been traveling to earth.

Hace 3 años
Timelord Victorious +1
Timelord Victorious

bi1iruben andromeda is an interesting example. We know where it is know, because we know it’s trajectory. It’s heading towards us and won’t significantly change that vector. The difference between where we see it and where it is is constantly shrinking until it and the Milky Way collide. We know the trajectory of other stuff and can predict relatively short term where they’ll apparently move to in the Sky. We just can’t extrapolate an entire universe infinitely into the future.

Hace 3 años
Anderson Cook
Anderson Cook

The expansion of space-time isn’t limited to the speed of light. Objects traveling through space-time are speed limited but they can move faster with space-time expansion.

Hace 18 días
cellborne
cellborne

Are we just lucky to be living at the exact time to be able to see almost to the big bang, or in a billion years will we still see the same first light sources just at 15.7b years old?

Hace 7 días
Wes Anderson
Wes Anderson

My question is: What lies outside our universe?

Hace 8 días
Ramen Vermicelli
Ramen Vermicelli

So, have we actually recorded any disappearing stars or galaxies yet?

Hace un mes
johnclawed +13
johnclawed

Thank you. It's very rare for anyone to clarify a thing like this without raising more questions than he answers.

Hace un año
Ernest Imken
Ernest Imken

Einstein's theory E=mc2 was proved in a 1917 eclipse. It also proved that starlight going past the sun was bent by the sun's gravity. Knowing this, are all observations distorted when light curves around every stars gravity?

Hace un mes
snowpants2212
snowpants2212

How big was the universe at the moment of the big bang?

Hace un mes
Diego Mera
Diego Mera

The sun's light is about 1 million years old because it takes that long for it to come out from where it was created (inside the sun) and the photons bounce around until it gets out.

Hace un mes
ZipItDotCom
ZipItDotCom

Even if it is only 1 mile wide, the question is: What's at the margins of the universe? What's beyond? Can you interact with it? Where is this universe and its expansion situated in?

Hace un mes
Greg Nixon
Greg Nixon

What is at the margins of the universe is not relevant for us. We can't get there. We can't "see" it. We can't do anything with that knowledge. Our own world that has a circumference of 26k miles has enough troubles for us to consider.

Hace un mes
Neelav +45
Neelav

This video was so well put together! Broke down the complexity into simpler bite sized pieces for us to understand. Thank you so much!

Hace 8 meses
larslarsn
larslarsn

Neelav - if by saying "us" understanding, you are telepathically connected to everyone ?? Please don't, I'm in no way part of your us.

Hace un mes
jackson junior +1
jackson junior

I wish could make sense what he is saying, but sounds interesting to me,

Hace 2 meses
Lawrence Christopher
Lawrence Christopher

@Peter Codner DID YOU GET YOUR JAB YET

Hace 5 meses
Bryan Baxter
Bryan Baxter

I think it's more likely to be infinite, which is a thing no number is able to reflect.

Hace un mes
Bas van der Graaff +1
Bas van der Graaff

Okay, but why is stuff like this never explained relative to the location of the 1 big bang? I presume all the light generated in that instant travels outward at a higher speed than matter (that also needs to shape itself, etc), how can you still see any of that? And measuring the boundary of the universe seems even more puzzling in that respect.

Hace 10 días
Jerry Jones
Jerry Jones

The location of the Big Bang is everywhere.

Hace 2 días
Dazfast
Dazfast

No, that's not correct, don't think like that.... there was no location... And there was no matter, just energy and eventually hydrogen when it comes down, it happened everywhere the sphere is hypothetical around where we are observing.

Hace 9 días
john cadd
john cadd

Can we tell where the centre of the universe is /was ? Which way will the huge space telescopes be pointing ? Acceleration implies a massive use of energy . Guess what my next question will be .

Hace un mes
Bill White
Bill White

If the Universe is never-ending, why even estimate an end measurement? If everything in the Universe was in one big ball and then blew up...what are the odds that the results are always perfectly round objects?

Hace 2 días
Michael Gauthier +321
Michael Gauthier

"Nothing is faster than the speed of light!" Universe while expanding: "Are you challenging me?"

Hace un año
Rohan Zener
Rohan Zener

No doubt that dark energy is stray energy levels not coiled up into oscillating strings.

Hace un año
Michael Gauthier
Michael Gauthier

Bro I left this comment 3 months ago and you guys are gettin Hella mad about this LOL

Hace un año
dabbbles
dabbbles

Really? Then how fast can Nothing go??

Hace un año
dabbbles
dabbbles

@Dale Thelander Addendum to the moon-landing thing.... When some American bragged about the moon-landing to Paddy da Irishman, Paddy shrugged and replied that was too trifling a t'ing to bother wid. The Irish had decided to bypass the moon and go directly to the Sun instead. So the American said THEIR experts had thought of that, but decided the spaceship would be burned to a crisp by the time they got halfway there, because the sun was so hot. Paddy then shook his head wryly and sez: 'Yas. We tort o' dat. But then we decided to go at night!' The question is, of course:- Is it purely coincidental that there are so many Irishmen in the US?

Hace un año
Eli Birau +2
Eli Birau

So, unless the earth is in the exact place where the big bang happened, how can we see the radiation from all directions?

Hace 28 días
Dazfast
Dazfast

It happened everywhere that's the key part.

Hace 9 días
RyO0O0o
RyO0O0o

How do we know there have not been multiple "big bangs"? Our "big bang" could be the remnants of old stars and galaxies that came together and gravity did it's thing and boom! This could have been going on since time immemorial

Hace 11 días
Richard Howell
Richard Howell

Maybe the observable universe is only a percentage point of one percent of the total universe or smaller. Can the speed of light change or lose momentum and cease to travel? Maybe the whole universe recycles itself but only in arguably 10-15 % while creating new materials adding to the periodic table.

Hace un día
James Elmore
James Elmore

what if we suddenly found ourselves able to see a whole other section that went through a big bang?!

Hace 3 días
The Modding Prodigy +10
The Modding Prodigy

This actually cleared up a lot of things for me. Thanks to Dr. Lincoln

Hace un año
dennis grimes
dennis grimes

I want to know how this guy knows what we will be able to do tomorrow, next year, or in a thousand years. We don’t even understand dark matter. How ignorant we are.

Hace un mes
qkcmnt
qkcmnt

How do we know the Big bang was only once happening? How do we know which Big bang it was? What are super novas? Isn't the Big bang just a monstrous supernova? If it's been 14 billion years since the Big bang, and we're looking at a 20 billion year old galaxy, does it not make sense that that 20 billion year old galaxy was before the Big bang? Therefore how do we know which galaxies were pre-big bang and which of them are post- Big bang?

Hace un mes
Merlin Geikie
Merlin Geikie

If the big bang propelled matter and dark matter away from the centre at huge speeds, this would explain the title question.

Hace un mes
60mankind +2
60mankind

With all this knowledge about how the universe was formed and with all the knowledge and skills in technology, you would think someone would get the earth to rotate in the proper direction.

Hace un mes
Doug Ingram
Doug Ingram

I was wondering if I was the only person to notice that.

Hace 5 días
Zorba Kaput
Zorba Kaput

@Clown SS Schwab Do you have difficulty with scientists learning things and updating information?

Hace 26 días
Clown SS Schwab +1
Clown SS Schwab

Everything is a given and you better follow. ...until they tell you it was all wrong and give you a new thing to accept ... . And if an equation doesn't work....just make up constant or unknown to add things up...

Hace un mes
Helene L +41
Helene L

Wow. Thank you, Dr Don. I think I almost understand that, although I'd be hard-pressed to do the math. If I think about it in terms of a car speeding away from me starting an hour ago and the distance from me that the car was an hour ago/ a half hour ago/five minutes ago, I feel like I have a better grasp of the notion. Perhaps it's all of those zeroes that are daunting.

Hace 3 años
Mr. J +1
Mr. J

@mrquicky Any confusion would be understandable. However it is true, at least to our current understanding, that space did not exist before the big bang. That initial event which created both space and time, lead to an expansion of space. However, space did not expand out from a singular point (which would make that point the "centre" of the universe). Instead, the space between everything expanded, which means that there was never a center, nor is there today, of the universe. It's not very intuitive to think about, but it is how the current model works.

Hace 3 años
mrquicky
mrquicky

@Mr. J 3:22 He says the universe was once smaller and hotter. He does not say that the universe or space did not exist. He doesn't want to get into the details. 3:47 No place was special... indicating that space did exist. Further, the entire sphere argument where earth existed when background cosmic radiation came to be measured. If fermilab does not believe that space OR time existed before the big bang... they did their damnedest to confuse the issue as much as possible.

Hace 3 años
Mr. J +1
Mr. J

@mrquicky No, space did not exist before the Big Bang. The Big Bang created space. It was not an explosion in empty space, it was the creation and expansion of space itself.

Hace 3 años
BartWilson
BartWilson

mrquicky i trust those brilliant minds over yours.

Hace 3 años
Ben Grizzly Adams
Ben Grizzly Adams

Whatever it is you think of Cosmology even when totally drunk driving the big white truck in the middle of the night, you’d be closer to reality that he will ever be.

Hace 3 años
theThinkerator +1
theThinkerator

This is all predicated on the assumption the earth is at the center of the Universe, and the location of the big bang IF we are not, then the universe COULD be vastly larger... and due to the sphere of light/time, we'd never know

Hace un mes
Common Cents
Common Cents

If it takes a super sized sun explosion to create gold and heavy elements then why did the big bang not just produce gold ?

Hace 14 días
doctorbea
doctorbea

You, sir, are amazing!

Hace un mes
Munawwar Hussain
Munawwar Hussain

Excellent description, and it does make sense

Hace 13 días
Dan Alaniz +54
Dan Alaniz

Thank you so much for this post. I'm in an introductory Astronomy class at my local junior college and this is a concept that I've had a problem with. Your video really cleared up my questions.

Hace 5 meses
R1DDL3
R1DDL3

@David Todd Singleton I’ve never read so much wrong in just three sentences.

Hace un mes
The Carpenter
The Carpenter

Perhaps someday you will learn the correct answer perhaps everything, or a portion of it is wrong and they've been wrong all along

Hace un mes
Martyn H +2
Martyn H

@Glenn Wiebe Yes throw away the Mercator and buy a globe!

Hace un mes
Glenn Wiebe +1
Glenn Wiebe

@David Todd Singleton I suggest you begin by not using Mercator ( the flat maps we all had at the back of our classrooms) maps.

Hace un mes
Martyn H
Martyn H

@David Todd Singleton Hahaha David 🤣

Hace un mes
MJ Holiday
MJ Holiday

"The universe" (which includes an infinite number of universes) HAD no beginning and will have no end. The universe was never CREATED -It has always BEEN. Most people have no problem with imagining an infinite future; why do they have a problem with imagining an infinite PAST?

Hace 6 días
Stephen Keefer
Stephen Keefer

So, breaking it all down to its simplest form then, size DOES matter.

Hace un mes
Peter Allen
Peter Allen

Is it because space can expand faster than the speed of light?

Hace un mes
Game Over
Game Over

The problem is, the speed of light varies, so as a form of measurement it will give flaws. Now, ask yourself, how could they possibly guess the diameter of Universe? These people literally go from pre-school to university nourished and back patted by a closed system education. Specialisation blinds.

Hace un mes

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