The NEW Crisis in Cosmology

9 701 Shikime 986 mijë

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I have good news and bad news. Bad news first: two years ago we reported on the Crisis in Cosmology. Since then, it’s only gotten worse. And actually, the good news is also that the crisis in cosmology has actually gotten worse, which means we may be onto something!
The most exciting thing for any scientist is when something they thought they knew turns out to be wrong. So it’s no wonder that many cosmologists are starting to get excited by what has become known as the Hubble tension, or the crisis in cosmology. The “crisis” is the fact that we have two extremely careful, increasingly precise measurements of how fast the universe is expanding which should agree with each other, and yet they don’t.
Original Crisis in Cosmology
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Sabine Hossenfelder's episode "Do we travel through time at the speed of light?"
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Komente

  1. Damage
    Damage
    53 minuta më parë

    So...no aliens?

  2. AJ Gomez
    AJ Gomez
    9 orë më parë

    I’m not scientific person BUT it’s obvious to me WE on earth are also moving towards/away of each galaxy in a direction sometimes opposite to others or just side by side… we are NOT the centre or the universe so measurements are biased by our own movement and position Then to make it worst … our own sun and earth and solar system and other stars in between us and anything we try to measure it affected by a lens that changes its real position because light just bends as it travels through magnetic fields … imagine try to measure a fly 🪰 passing through a tree 🌲 we are going to have to take in consideration lol the leaves of the tree the branches etc to actually see the fly in complete trajectory. ANYWAYS JUST throwing a brain 🧠 tantrum here 🙏🇦🇺👍

  3. Gabriel Vacariu
    Gabriel Vacariu
    10 orë më parë

    See the alternative of the UNIVERSE in Synthese’s article (USA, 2005) and my Springer’s book (Germany 2015/2016): the “Universe” does not exist, it cannot have any ontology! What really exist are “entities” and their “interactions”. The wrong framework, the “Universe”/“world” is replaced with a new framework the “Epistemologically Different Worlds” (for quantum mechanics, the micro-macro relation, the mind-brain problem, emergence, levels, etc.) (IT IS TOTALLY DIFFERENT THAN EVERETT’s APPROACH!!) All my main ideas (the mind-brain problem, main problems of cognitive science and quantum mechanics, Einstein’s relativity vs. quantum mechanics, etc.) from my Springer’s book (2015) can be found in my PhD thesis (2007), UNSW (Sydney, Australia, officially posted on university’s website, FREE, by the university’s Staff in 2007) www.unsworks.unsw.edu.au/primo-explore/fulldisplay?vid=UNSWORKS&docid=unsworks_5143&context=L My book at SPRINGER (Germany): "Illusions of Human Thinking (2015/2016) - On concepts of Mind, Reality, and Universe in Psychology, Neuroscience and Physics" [manuscript sent to Springer in 2014 and first published (online) in October 2015; on the cover is written 2016! WHY?] This book = summary of the main ideas of my PhD thesis published in 2007 + my first FIVE books (English), all FREE at my webpage! filosofie.unibuc.ro/gabriel_vacariu/ Many books/articles FREE at www.researchgate.net/profile/Gabriel_Vacariu/publications (I have 12 published books on the main problems of Physics, Cognitive Neuroscience and Philosophy (philosophy of mind/physics/metaphysics/ontology/etc., all English!) ATTENTION: Gabriel Vacariu, (June 2020 to 2014) The UNBELIEVABLE SIMILARITIES between the ideas of some people (2011-2016) and my ideas (2002-2008) in physics (quantum mechanics, cosmology), cognitive neuroscience, philosophy of mind, and philosophy (this manuscript would require a REVOLUTION in international academy environment!) FREE at www.academia.edu/s/0c1502ea90 ;www.researchgate.net/publication/340621608_April_2020_2014_Gabriel_Vacariu_UNBELIEVABLE_similarities_odf philpapers.org/rec/VACAT-2 My personal webpage: sites.google.com/view/gabrielvacariuphilosophybuchar/home VIDEOCLIP: May 11th, 2020: Gabriel Vacariu's presentation for Department of Physics, Pabna University of Science and Techonology, Pabna, Bangladesh, for International Physics Webinar_153, organized by Pretam Kumar Das (physicist at that university): "The EDWs and Quantum Mechanics" here: alfirst.info/load/ZWmIYqS1isZlpqM/video&ab_channel=PretamKumarDas

  4. Isaac Roberts
    Isaac Roberts
    Ditë më parë

    fake

  5. g davis
    g davis
    Ditë më parë

    turned off as soon as they said "dark energy". go work, counterproductively at cern....

    1. Preetha O.C
      Preetha O.C
      7 orë më parë

      Dark energy.

  6. James Taylor
    James Taylor
    Ditë më parë

    Their is a very obvious answer here & that is that the speed of light isn't constant because it isn't traveling threw a consistent medium, if dark matter is just very small stuff & that stuff being effected by gravity is massed around galaxies then the bending effects would be caused by bubbles of stuff around objects instead of curved space, this leaves us with no yard stick with which to measure the universe, current physics isn't built on the right foundation.

  7. 215dagby
    215dagby
    3 ditë më parë

    I like how these episodes are 15 minutes of mumbo-jumbo finished off with a “No one knows wtf is going on. Tune in next time for another episode of Spacetime.”

  8. DeathadderOne
    DeathadderOne
    3 ditë më parë

    *walks under the cosmic distance ladder*

  9. Big Brain
    Big Brain
    5 ditë më parë

    OMG, Dark energy was NOT discovered! Show me some!

  10. Sean g 137
    Sean g 137
    6 ditë më parë

    The crisis in science is a myriad of problems compounded by money interests, prizes given for incomplete Hypothesis, a snail's pace inefficient peer review system dependent on protectionism that favours the rich, excludes the poor and shows hostility to anything that challenges the current models...even though they are screaming out that they must be challenged. The double slit experiment has been solved using an inequality that is indisputable and it unlocked the Grand Unified Field Theory that works seamlessly to unify and solve everything with no scifi, fudges or assumptions, yet the blindness of the status quo and the woefully inefficient system is STILL holding it back after 18 months, copious amounts of robust peer reviewed evidence, new mathematics and new experiment setups to verify it, over and over again. alfirst.info/load/lXuonpvSbrCAq6s/video

  11. Don Carlo di Vargas
    Don Carlo di Vargas
    6 ditë më parë

    Ok, but do not fiddle too much, don't damage the cosmos

  12. John Boze
    John Boze
    6 ditë më parë

    I got BANNED from REDDIT TODAY for Asking REDDIT "Do Photons Have Mass?" WILL GET YOU MUTED. If you ask the same question again "Do Photons Have Mass?" YOU GET BANNED!! True Story Happened to Me Today. Try it yourself on REDDIT r/AskPhysics . Then ask "Is Photon Mass Given by: m = (h/cλ) (kg)" Link To Todays Message From REDDIT when asked "Do Photons Have Mass?": On fb /John.E.Boze/posts/2859567560972323

  13. Michael Bindner
    Michael Bindner
    7 ditë më parë

    If I were a space traveler, I would want to know where stars really are now, rather than what the light says.

  14. Steve Cullen
    Steve Cullen
    8 ditë më parë

    Maths not 'Math'...

    1. Steve Cullen
      Steve Cullen
      7 orë më parë

      @Preetha O.C Que?

    2. Preetha O.C
      Preetha O.C
      7 orë më parë

      @Steve Cullen Math.

    3. Steve Cullen
      Steve Cullen
      8 ditë më parë

      @Thomas Wright No: one is English the other is something from another language I'm not familiar with. I suspect it's a derivation of some European language probably French, where the plurality of the word is singularised.

    4. Thomas Wright
      Thomas Wright
      8 ditë më parë

      Both words are short for "mathematics." One is more common in North America, the other in Britain. But both are correct.

  15. jack russell
    jack russell
    8 ditë më parë

    Hmmm. In all our experience, bodies accelerate from a position of high potential energy to a position of low potential energy. So how can the universe be accelerating 'outward' rather than inward toward something else? Is it actually accelerating toward the mother of all black holes, ultimately to re-explode into another, possibly very different, universe? Also, I have not until now learned that someone has "discovered" dark energy/matter. No, it's an hypothesis. And the description of these so-called entities as being un-measurable and undetectable makes "discovery" impossible.

  16. Al
    Al
    9 ditë më parë

    WOW! The number of women now being credited with being first. I knew about Eunice Newton Foot, Rosalind Franklin, Katherine Johnson and Jane Goodall!

  17. Greg Metcalfe
    Greg Metcalfe
    9 ditë më parë

    YAN crisis. Yawn. When presenters speak of crisis, then ask a question about it, the answer is always 'No.' Will the LHC destroy the earth? No. Is the Hubble tension really a crisis? No. Is it, then an opportunity? Possibly. If it's not simply a problem with new technology/technique. All of this fake drama on ALfirst got old ages ago. The one thing that certain here is that I will never donate to PBS again.

  18. Jordan Harry
    Jordan Harry
    11 ditë më parë

    Can someone help clear something up for me? The original Hubble tension is between calculations based on standard candles, and calculations based on the CMB. From previous videos, I thought that saying “calculations based on the CMB” was equivalent to saying “calculations based on baryon acoustic oscillations, which we get from measuring the CMB.” But at 10:08 Matt seems to imply that BAO measurements would be a method independent from CMB measurements. What am I missing? Is there a way to use CMB measurements that doesn’t involve BAOs? Or is there a way to do BAO measurements that doesn’t involve the CMB? Or am I way off in some other way? Thanks!

    1. Jordan Harry
      Jordan Harry
      6 ditë më parë

      @JOHN294 thanks! This does answer my original question! For anyone wondering the same thing, the answer is that while our analysis of the CMB does require applying what we know about BAOs, that’s not the “BAO measurements” he was talking about. He was talking about a separate method of measuring distances in which we measure the arc size in the sky of spherical shells of galaxies, and use what we know about BAOs to assume they all have the same diameter, and then we can tell the distance to them. Now I have a new question. The episode on The Secrets Of The CMB said that the density fluctuations had different sizes, some of which resulted in half-integer number of BAOs. But this article (and the episode on BAOs) say that they’re all the same size, so we can use them as standard rulers. Which is it? And if they’re not all the same size, how can we use them as standard rulers?

    2. JOHN294
      JOHN294
      8 ditë më parë

      You are in luck, this just came out, I think it explains it nicely: www.scientificamerican.com/article/worlds-largest-map-of-space-offers-clues-on-dark-energy/

  19. E Miller
    E Miller
    11 ditë më parë

    Alright. I’m confused again. Both Gaia and Planck came up with different measurements for the Hubble Constant. The Kashlinksy et al. Research on Dark Flow says it “subtracted” the Hubble Flow to get the Particular Flow ... but if there is a difference in almost 20 Km/s/Mpc, what assurance do we have it was accurately subtracted. Did Gaia and Planck satellites look in different directions?What if what Kashlinsky’s team actually saw wasn’t matter flowing through space, but space itself flowing with different values ahead and behind us in the flow?

    1. JOHN294
      JOHN294
      8 ditë më parë

      To my understanding, both are all-sky survey. The oval-like images came from project that view from inside a 3D sphere into a flat surface.

  20. East Afrika
    East Afrika
    11 ditë më parë

    Maybe for the European, there has never been a crisis in cosmology for us Afrikans, we taught the white man to read the stars.

  21. Chad Novelli
    Chad Novelli
    11 ditë më parë

    Document 1207 Page 7

  22. Ali Alfadhel
    Ali Alfadhel
    12 ditë më parë

    Do a video on quantum holonomy

  23. luiginocm
    luiginocm
    12 ditë më parë

    The universe can never be fully understood.

  24. Anthony 1965
    Anthony 1965
    12 ditë më parë

    Loada crap

  25. Ron Fuse
    Ron Fuse
    12 ditë më parë

    NEWS FLASH : Dark energy and Dark matter is bullshit

  26. Ralph Ricart
    Ralph Ricart
    13 ditë më parë

    There is no expansion, no light years, no black holes, no big bang and no globe. If cosmology doesn't get up to speed it's going to miss the boat.

  27. Josiffrank
    Josiffrank
    13 ditë më parë

    Yes, you're right and the most excited scientist got to be the ones that spent their career on useless or wrong science, and now they will lose their jobs or research funds

  28. MrNightpwner
    MrNightpwner
    14 ditë më parë

    Doesn't this assume the universe expands at a uniform accelerated rate in all directions? What if it expands differently, at different accelerations, everywhere?

  29. BuddySteve
    BuddySteve
    14 ditë më parë

    I believe that EVERY TIME as in past, present, future is happening at the EXACT SAME TIME! Once you understand that fact, we'll be much closer to understanding the universe!

  30. Justin L
    Justin L
    14 ditë më parë

    What if the galaxy’s hit a speed bump in their expansion, like some kind of gravitational force from another galaxy or black hole? Wouldn’t this through off the equation?

  31. Bobby Baldwin
    Bobby Baldwin
    15 ditë më parë

    Sirius seems to be stationary against the background of stars.....basically the error is pretty low on the distance ladder which is why the math seems unbelievably wrong . Basically our sun orbits Sirius who then orbits the galactic center

  32. Bobby Baldwin
    Bobby Baldwin
    15 ditë më parë

    The broken rung is that there are subgalactic orbital groups I knew it!

  33. 8bitparkour
    8bitparkour
    16 ditë më parë

    Doesn't this evidence instead point towards the idea that hubble's "constant" is an incorrect assumption. You are assuming that there is a universal expansion rate, which seems highly unlikely.

  34. sammy coombes
    sammy coombes
    16 ditë më parë

    flat earthers go brrrrr

    1. Thomas Wright
      Thomas Wright
      8 ditë më parë

      @Poopyface Chomp Everyone knows the earth is banana-shaped! We know this because the government uses sheep bladders to control earthquakes.

  35. Truth Elevates
    Truth Elevates
    16 ditë më parë

    Friendly advice, blink more often! Great video though!

    1. Truth Elevates
      Truth Elevates
      15 ditë më parë

      @Poopyface Chomp Yeah, his eyes are red and have a strange glare... could be a mescaline lol!

  36. Greg MELLOTT
    Greg MELLOTT
    16 ditë më parë

    As someone else touched upon. There may be a simple reason for the variance in the results that are derived from the very old information of the background microwave. One factor that may be involved is the fact that the signal propagates at the speed of light; yet that speed is referenced from the local gravity field's sources that it is passing by. This may make the signal appear to actually travel less distance (especially as it has travelled so far and has more time to be effected); so the standard intensity may measure stronger than the actually distance it has travelled would suggest. The nearer it gets to us the more it speeds up as it relates to the local speed limit. Another factor I'm pretty sure they already figure in is the accepted expansion-rate's effect that has it closer to us when it was generated than it is now. Another factor I can think of is the fact that all interactions progress slower in a higher intensity energy environment that a low intensity one. At the time the microwaves were generated, the universe was smaller with more energy in less space. That would have the expansion progressing slower then than it presently does. Another factor that may also be involved is that the gravity from what was in the area before will still persist in its propagating even though the sources have moved on. Admittedly, it would also propagate like the light does, as described above. Yet one may note the effect that what is nearer the center of all the sources of gravity will receive less of a total effect from it than what is near the edge of it all. If you could be in a bubble at the center of the Earth you would float as if in outer space. And there is also the possibility that there is something of a cold remnant of a former universe, or multiple ones, that our presently visible universe is propagating into an being effected by the persisting gravity from it that it runs into. In that effect one may note that should our present universe be moving at a relativistic speed compared to the sources that are presenting the gravity to us there will be an intensity increase shift as it interacts with our universe heading into it at such high speeds. This very effect may also explain why propagating energy will always move at the speed of light in an environment, even if it requires the speed to increase from what it was before. The gravity it meets always has a stronger attraction in the direction of travel.

  37. Staal Burgher
    Staal Burgher
    17 ditë më parë

    Can't even watch PBS without encountering virtual signalling 😐

  38. Guniss Seecharan
    Guniss Seecharan
    17 ditë më parë

    The universe is not expanding it’s that simple..Hubble’s law that the universe is expanding base on calculations of redshift and distance of objects cannot be conclusive without factoring in those calculations how black holes and galaxies are form and what causes them to spin..But then again scientists don’t have a clue as to how black holes and galaxies are form and what causes them to spin so Hubble purposely left out this in his findings..That’s why we would never match two calculations and find the same answer..In other words Hubble’s law is garbage..There’s a phenomenon that causes the formation of black hole and galaxies and what causes them to spin and only with this knowledge we will see that the universe is not expanding , but static..The phenomenon? Hmm I’ll leave that for a noble prize ...

  39. EMH
    EMH
    17 ditë më parë

    I've always thought of myself as a relatively intelligent person. Then I started watching PBS Space Time and realized my measurement was miscalibrated.

    1. Thomas Wright
      Thomas Wright
      8 ditë më parë

      @Poopyface Chomp It does if you understand that time is a cube. Most people miss that, and it throws off the results.

    2. Thomas Wright
      Thomas Wright
      8 ditë më parë

      @Poopyface Chomp The world is banana-shaped. Only a puppet of the mainstream media would believe differently.

    3. Doug Thompson
      Doug Thompson
      16 ditë më parë

      Same here. We're members or the same genus and species, but beyond that, I'm just a poo-flinger.

  40. Behnam Zadeh
    Behnam Zadeh
    17 ditë më parë

    Expending exariating galexys is forcing of big bang theory nothing to do with dark energy or dark matter if big bang theory is carect . space is space ther is no dark matter no brainier

  41. John Thomas
    John Thomas
    17 ditë më parë

    I can't get into anything 'PBS'! There is always a political slant that I find nauseating! My tax dollars at work!

  42. Richard Everington
    Richard Everington
    17 ditë më parë

    The only crisis is that humans actually think we can understand the Cosmos. We'd have to be gods to do that, Nuts.

  43. tonevicar
    tonevicar
    18 ditë më parë

    Listen up idiots...there is NO crisis in Cosmology. The crisis is that we dont understand the universe. Simple.

  44. Mike Herman
    Mike Herman
    18 ditë më parë

    MOST scientists love being wrong because that leads to new science. Climate "science" has different standards, however. Disagreement with accepted climate orthodoxy is punished.

  45. Thomas Erbsenzähler
    Thomas Erbsenzähler
    18 ditë më parë

    I don't know why I'm looking at this. I'm a forklift driver and I don't understand that anyway. What is particularly confusing is that I look at what I don't understand AND in a language in which I only understand a few words. Something is wrong with me

  46. Thomas Stewart
    Thomas Stewart
    18 ditë më parë

    ok, so heres what I don't get: we know that time is not consistent in its rate at all points throughout the universe. we know that space is not consistent in it's density at all points throughout the universe. surely basing distance measurements on two distinct scales that differ in their starting points would naturally produce multiple hubble "constants"? surely the constants that we measure the universe by are dependent on the shape of the universe that they travel through? if the marks on the ruler are not consistent, then counting how many repetitions of the first mark it takes to get somewhere won't necessarily match counting up by that number of marks. if the object being measured is similarly spatially inconsistent, then having a consistently marked ruler won't provide consistent results. in fact, I would bet that measuring the bubble constant via a series of different methods, no matter how accurate those methods are, would produce different values that all accurately reflect the hubble constant as measured across space in different ways.

  47. sleep
    sleep
    18 ditë më parë

    I'm sorry but when he changed his accent from australian to american its so funny,

  48. 2011Matz
    2011Matz
    18 ditë më parë

    Why doesn't an expanding Universe have a centre?

    1. Thomas Wright
      Thomas Wright
      8 ditë më parë

      The problem is how to identify where such a center might be. Because if it is expanding uniformly, then there's no way to tell where that center really is. From our perspective, we might assume the Milky Way. But for all we know, the center might be right on the edge of the observable universe, and there's not really an objective way to know which perspective is correct. We are at the center of our own observable universe, but an observer at the edge of our observable universe would we at the center of their own observable universe.

  49. Samna Amee
    Samna Amee
    19 ditë më parë

    Maybe the fabric of the universe is expanding at different rates in different places.

  50. rapsod1911
    rapsod1911
    19 ditë më parë

    Maybe difference is due to position of our part of space in relation to true center (where big bang occurred).

  51. Aubrey Steele
    Aubrey Steele
    19 ditë më parë

    Could it possibly be that a few sheep-herders living in a desert thousands of years ago could see and understand things that today's scientists with all their supercomputers and telescopes don't? Nah. See Isaiah and Jerimiah, among others, if interested. Any honest mathematician will cede that regardless of how intricately intertwined the elements of a field of math are and they can be deciphered, if the underlying postulates are in error, then that field will probably prove worthless at explaining or predicting anything.

  52. Hero Slayer
    Hero Slayer
    19 ditë më parë

    Headspace should hire Matt O'Dowd!!

  53. Lisa R
    Lisa R
    19 ditë më parë

    Matthew 5 41 all of creation is in ABSOLUTE CAPTIVITY . AND YOU CAN'T SO MUCH AS MEASURE A FOOT ON A WITHOUT IT BEING IN CHRIST JESUS OUR LORD AND YOU MUST ASK IN HIS NAME TO GET AN ACCURATE.

  54. Blub 01
    Blub 01
    20 ditë më parë

    I find it interesting that both methods using data from the big bang give different results than the other methods based on more recent events. it gives credence to the theory that dark energy changes over time.

  55. hipN0
    hipN0
    20 ditë më parë

    If it takes light to travel hundreds of thousands of light years to travel to earth from another star think about how long it took for that light to reach earth by the time we see it... wouldnt the distance have expanded by at least double that because of the rate of expansion i have a feeling that the stars we see way off far away might be we way farther than we calculate them to be because we measure it as lightyears with out calculating for expansion durring that time in which we persive it.. this might answer the question/concern at the begining of the video

    1. Thomas Wright
      Thomas Wright
      8 ditë më parë

      It's why they say that the observable universe is 92B lightyears across, yet the universal expansion only began about 14B years ago. The stars we see now ARE way farther way than they were when the light we see now left them.

  56. LaughingMan
    LaughingMan
    20 ditë më parë

    Could expansion just be spacetime folding in on itself? Like the folds and wrinkles of the brain. Increasing the "surface" area within the enclosed space.

  57. Michael Honie
    Michael Honie
    21 ditë më parë

    This man has a shockingly large head.

  58. Carleton Gruger
    Carleton Gruger
    21 ditë më parë

    Why is he not talking about the Plasma principles or the Nassim theory of holographic scale of the universe? Seems omission is at hand.

  59. russell wolman
    russell wolman
    21 ditë më parë

    but then how do we get to the edge of the black part of space

  60. Theron Gilliland, Jr.
    Theron Gilliland, Jr.
    21 ditë më parë

    Does anyone else watch these videos and try to ask themselves questions like, "I wonder if the scientists considered time dilation of light moving through a gravitational field in the multiple quasar image gravitational lensing calculations?" and its almost certainly things that scientists definitely have considered? 😂

  61. Andrew Dobbin
    Andrew Dobbin
    22 ditë më parë

    Then perhaps its sitting still not expanding. Maybe we are shrinking!!! I'd hate to be a cosmologist and dedicate 50-60 years to a theory only to find out 5 seconds before I die that the theory was wrong and I wasted my life!!!

  62. Contemplate Eternity
    Contemplate Eternity
    22 ditë më parë

    Spoiler alert: the differences in Ho are real. The ultimate conclusion will be an understanding of time as a spatial dimension in its own right which defines our 3D space as degenerate cyclical time dimensions (can watch my vids for a visual). Till then- squirm human physicists. ;) Should be a wild ride. Much love, Matt.

  63. Ralph Hill
    Ralph Hill
    22 ditë më parë

    The best news is that the solution is already out there, waiting for publication only: Negative energy is a real physical thing, driving expansion. Energy in gravity holds the key. The universe is older than assumed, new evidence of an inexplicably mature galaxy in the early universe has just demonstrated it. The Friedmann equations describing a kinetic expansion are invalid, affecting all of cosmology. Current model has been based on impossible physics: an initial singularity that should never expand, lack of definition for direction in its kinetic expansion. All that is resolved and another exciting questions that cosmology should address: How energy emerges in the first place. Early adopters check dualenergyuniverse.org

    1. P. Flitzi
      P. Flitzi
      12 ditë më parë

      💪

  64. Jimmy Brice
    Jimmy Brice
    22 ditë më parë

    personally, i dont think dark energy or dark matter exists. i think we have something wrong

  65. TheNikoado
    TheNikoado
    22 ditë më parë

    Is the universe is expanding outward in every direction and is the universe mainly "flat" on the largest scales? Does this mean that since the universe is basically expanding in a sphere, there is an even more ridiculous amount of "empty" space out of the plane of the universe? We know how big the observable universe is "now". But if we fully understood the big bang, is there any way we could estimate the size of the entire universe, relative to size of the observable universe. Is the entire universe truly "infinite" at this "time", or is it just continuously expanding, with that expansion rate also speeding up due to dark energy?

  66. Rocket Surgeon
    Rocket Surgeon
    23 ditë më parë

    If only evolutionary scientists enjoyed being wrong. They could learn from cosmologists

  67. Grumpy Oldman
    Grumpy Oldman
    23 ditë më parë

    "Scientists love being wrong". What Karl Popper - possibly the greatest philosopher of science in the 20th century - designated "falsification".

  68. Richard Zippler
    Richard Zippler
    24 ditë më parë

    Doesn't the brightness of a star depend on how much dust is in the way. I'm not sure how you can make any standard candles that way. Somebody get out of vacuum cleaner.

  69. Thom James
    Thom James
    24 ditë më parë

    Maybe the expansion rate of the universe increases when you look further away from your own POV?

  70. Rick Pontificates
    Rick Pontificates
    24 ditë më parë

    If the universe is expanding in all directions, then doesn’t it mean that this unknown “great attracter” that everything is accelerating towards is spherical and encompassing the entire universe?

  71. steven
    steven
    24 ditë më parë

    Who is this guy? I love his simplistic explanations of complex things. 😜

  72. Alan Myers
    Alan Myers
    25 ditë më parë

    Thank you to PBS and all of you for these cosmology talks. I always learn something new and exciting.

  73. SHADAB ANSARI
    SHADAB ANSARI
    25 ditë më parë

    Good

  74. Anna M
    Anna M
    25 ditë më parë

    We, also, are in a crisis :)

  75. Rohit S Kakade
    Rohit S Kakade
    25 ditë më parë

    what if light from distant galaxies is gravitationally lensed twice? how will we ever know about it?

  76. greg smith
    greg smith
    25 ditë më parë

    The answer is in Isaac Newton's gravity equation. The Laser Interferometer Gravitational-Wave Observatory (LIGO) the large-scale physics experiment and observatory detected cosmic gravitational waves off two colliding black holes sending a ripple that reached earth a few years ago. Ergo... The Hubble Constant is the problem. All the ripples and other M1 x M2 (Newton) "interference", Hawking radiation etc needs to be added back. Heisenberg's uncertainty equation also is interesting because the "vacuum" of the universe is unfolding dynamically generating temporary matter. That's your crisis IMHO

  77. 7orx
    7orx
    26 ditë më parë

    Seems to me like the discrepancy in measurements of the hubble constants coincide with discrepancy in the time the measured effects were created. Both the baryon acoustic oscillations and the cosmic microwave background seem to be relics of the early universe, while 1A supernovae and gravitational lenses seem to be "later".

  78. Roger Spurr
    Roger Spurr
    26 ditë më parë

    We did the actual experiments and see the muons and electron showers right here. alfirst.info/load/p6xnk5HNf9ubhY0/video Bohr Atomic model has one Big positive core but Bohr ...is no more. Electron Flood Theory replaces the atomic nucleus with dipoles that are literally electrons that vibrate until they are in mass quantities of (1839 proton or 1840 neutron ) that are stable called ATOMS. This allows for nuclear decay and radiation and isotopes and I show them.

  79. Ghost Hunters NYC-Upper West Side Occult Science
    Ghost Hunters NYC-Upper West Side Occult Science
    26 ditë më parë

    » LOL

  80. Ranger Don
    Ranger Don
    26 ditë më parë

    Mask up

  81. TryHard FinessedYou
    TryHard FinessedYou
    26 ditë më parë

    Every 5 years you nerds tell me everything I know is wrong. Take it up the back mate.

  82. Ultimate Powa
    Ultimate Powa
    27 ditë më parë

    Space is a substance being produced by Black Holes, effectively increasing the distance between us and the galaxy

  83. BarakLapithdothÂpocalypseFullMoonGtr
    BarakLapithdothÂpocalypseFullMoonGtr
    27 ditë më parë

    🔵 Devine Revelation is given in part to keep science on track with Reality.... first off - there was No Big Bang ; there was Devine immediate Creation by the Word of God ; secondly , the Universe is Infinite , yes , that is correct , the universe goes into Infinity ; third off - evolution is an entirely flat out false theory ; mankind was created as per the Genesis account ; so when you are ready to accept these concepts of Reality , then you may be ready to get your science correctly focused ❕

  84. Thạnh Phạm
    Thạnh Phạm
    27 ditë më parë

    Stupid science Science doesn't know The Earth ' s core pushes into the moon ' s core 1460 tons electricity per second causing tides on Earth

  85. MrDino1953
    MrDino1953
    27 ditë më parë

    The progress in particle physics and cosmology since the 1950’s, when I was born, has been truly amazing to watch. I just hope to live long enough to see if, and how, this crisis and things like quantum gravity are resolved.

  86. Kira de La Rochefoucauld
    Kira de La Rochefoucauld
    28 ditë më parë

    Cannibalizing its binary partner. A NU form of Wokeism.

  87. Karim Ghantous
    Karim Ghantous
    28 ditë më parë

    A lot of science just isn't "settled", and quite frankly that's what makes it so interesting.

  88. Vera511
    Vera511
    28 ditë më parë

    " “Lift up your eyes to heaven and see. Who has created these things? It is the One who brings out their army by number; He calls them all by name. Because of his vast dynamic energy and his awe-inspiring power, Not one of them is missing." (Isaiah 40:26)

  89. Carson F
    Carson F
    28 ditë më parë

    i'M 6 ????

  90. Mike O
    Mike O
    28 ditë më parë

    We discovered dark energy but we don't know what it is. Hey, I discovered gold, just look really really hard...I don't know, it seems in the early 20th century we took a wrong turn..missed something.

  91. Javier Francia
    Javier Francia
    29 ditë më parë

    Dark Energy is a mathematical construct. There is NO actual evidence it exists, so stop evagellizing about it

  92. koczisek
    koczisek
    29 ditë më parë

    If we get multiple results for "Hubble constant" measurements with totally disjoint uncertainties, then why not to just conclude, that this isn't a constant, not only in time, but also space? If space expansion is attributed to the "dark energy", it's quite predictable for this "energy" to have distribution. We're after all observing only a part of observable universe, while what we define as superstructure may not even be of the very highest order. Therefore the dark energy distribution may be pulling on different parts of the observable universe with different force. Considering the evolution of our understanding of "constants", this could be rather sane assumption, preventing calling this situation a "crisis".

  93. Inferno
    Inferno
    29 ditë më parë

    Your explanations about cosmology is so clear

  94. H. H.
    H. H.
    Muaj më parë

    14:25 "Your velocity through spacetime, also called your 4-velocity is just the change in the spacetime interval divided by the change in time." It's important to note that it's spacetime interval per unit of your, subjective, or "proper", time - time from your perspective, in your reference frame, the reference frame of the object whose 4-velocity you're describing.

  95. H. H.
    H. H.
    Muaj më parë

    Intuitively to me, the Gaia supernova result seems a lot more trustworthy to that.

  96. Savannah Woods
    Savannah Woods
    Muaj më parë

    I use H_0 of about 70 km/s/Mpc for my work with AGN, Im worried about the mounds of published science that used what might be an incorrect value for H_0

  97. TheMedia-Hacker
    TheMedia-Hacker
    Muaj më parë

    @jamal the 3rd I was Always Skeptical of Dark matter/Energy hypothesis , I Rather phrase it As a form of Disappearing Locality What I believe is Locality is PHASED forming different interaction from differing SPACE TIME coordinate simeoustanily , Giving the Illusion of more Space and mass

  98. Harmen Greven
    Harmen Greven
    Muaj më parë

    The Feynman story is totaly awesome.

  99. Chris Price
    Chris Price
    Muaj më parë

    'and so dark energy was discovered'. Can you really say discovered?

  100. Dr. POP
    Dr. POP
    Muaj më parë

    I love the fact that "Dark Energy", "Red Dwarf", "Supernova" are all real scientific terms. JRR Tolkien could not have come up with anything better.

    1. John Namkeh
      John Namkeh
      23 ditë më parë

      Seriously, the technobabble that scientists have come up with is more than what any Star Trek writer could come up with. yes Mr Data, please continue measuring baryonic acoustic oscillations to verify the distance to my standard siren produced by merging neutron stars, to disprove the theory that the cosmic background radiation is a better measure for cosmic inflation than predictable supernovae.