Brian Greene and Adam Riess: The Accelerating Universe

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  • Опубліковано 20 тра 2024
  • Nobel Laureate and physicist Adam Riess and Brian Greene discuss the paradigm-shattering discovery that the expansion of the universe is accelerating, the role of dark energy, and more.
    This program is part of the Big Ideas series, supported by the John Templeton Foundation.
    Live Sessions are conversations hosted by Brian Greene with world-renowned scientists, including World Science U faculty exploring matter, mind, and the cosmos.
    Official Site: www.worldsciencefestival.com/
    Twitter: / worldscifest
    Facebook: / worldscience. .
    Instagram: / worldscifest
    #science #WorldScienceFestival
  • Наука та технологія

КОМЕНТАРІ • 747

  • @alicepaul6276
    @alicepaul6276 3 дні тому +1

    It is amazingly stimulating to watch / listen to your World Science Festival episodes!

  • @smoogems
    @smoogems 3 роки тому +48

    Uncle Brian's bedtime stories are the best.

  • @millennialfalcon1547
    @millennialfalcon1547 Рік тому +5

    Dr. Greene, it's so refreshing to hear you speak openly and authentically about the limitations, inconsistencies, and current problems with the standard model of cosmology. It does not mean you're against the same standard model. It means you're upholding to true Spirit of scientific inquiry and culture which must never be afraid to ask the hard uncomfortable questions and admit where and when we do not know the answers.
    I happen to think that this lack of openness is precisely what has alienated the popular culture from modern scientific theory.

  • @ricardodelzealandia6290
    @ricardodelzealandia6290 3 роки тому +31

    Every time I see Brian with this background, I want to go and live out in the country.

    • @dustman96
      @dustman96 3 роки тому +2

      I keep looking at the background, it's beautiful. Is that a green screen?

    • @ccarson
      @ccarson 3 роки тому

      @@dustman96 In early Q & As it's the real view outside his 'barn' window. But I think since he has started to use video illustrations he is using a green screen.

    • @Rajansippy1
      @Rajansippy1 3 роки тому +1

      It's green screen with terrible video editing

    • @timewalker6654
      @timewalker6654 3 роки тому +2

      @@dustman96 used to be real, but its green-screen since last two live sessions.

    • @HowardBaileyMusic
      @HowardBaileyMusic 3 роки тому

      @@timewalker6654 He doesn't want us to see his barn that's in desperate need of a pressure wash LOL (the REAL Green screen)

  • @floatingshoppinglist5193
    @floatingshoppinglist5193 8 місяців тому +9

    I'm glad to express myself as a musician during this current tine period of pain and suffering with a pinch of curiosity. Peace and Love to EVERYONE ❤☮

  • @stephenjones796
    @stephenjones796 3 роки тому +23

    Dr. Greene, just a great 3 hours. Dialogue with Adam Reiss was education as well as a great mind exercise. You are so very VALUABLE to many many for some sanity and reality and it’s beauty and shortcomings. Thanks again

  • @Samael-Metzger
    @Samael-Metzger 8 місяців тому +23

    Simply admirable for Brian Greene to give of himself for such a worthwhile program. Much appreciation and my greatest respect.

    • @chrisbennett6260
      @chrisbennett6260 8 місяців тому

      brian green .consciousness is an illusion ,that being the case so are his theories ,and believes must be equally illusory

    • @walshamite
      @walshamite 2 місяці тому

      @@chrisbennett6260 The nature of consciousness may be other than it "feels" to us, but that us not to say it's an illusion (in the sense we generally use that term) ... consciousness appears to be a generated reality of the brain (mind) that is partly created by the senses, but exists even in those born deaf and blind, and it apparently ends when we die, but hey, who knows? The idea that consciousness is a wider function of matter and the universe is not disproved.

    • @chrisbennett6260
      @chrisbennett6260 2 місяці тому

      @@walshamite
      Brian Green is full of it and i mean full of it
      if its an illusion so are his danm beliefs and conceptions also
      Green or you can say what the hell you want
      whatever man

    • @danielpaulson8838
      @danielpaulson8838 День тому

      @@chrisbennett6260You told us all about you

    • @chrisbennett6260
      @chrisbennett6260 День тому

      @@danielpaulson8838 cut your crap nonsense

  • @keithmcgarrigle2653
    @keithmcgarrigle2653 Рік тому +2

    With the Hubble telescopes data for the most red shifted Galaxies in the Nineties, and comparing the red shifted data now.
    The difference in the results would prove rate of expansion?

  • @jonathaneves5847
    @jonathaneves5847 3 роки тому +2

    Hi Brian. Greetings from Liverpool 🇬🇧. Fascinating show as usual. How little we know! ✌️🐝 Now back to your show.

  • @jdperson7922
    @jdperson7922 3 роки тому +3

    I'd read your novel in a heartbeat. In fact, I'd be up for a series!

  • @marylunney3483
    @marylunney3483 2 роки тому +5

    Brian Green: Fab as always in his flexible creative and respectful discourse and his inspiration to others

  • @rubhan94
    @rubhan94 3 роки тому +2

    I like watching livestreams as I come by them. The time zone difference makes it hard to catch livestreams in America, but sometimes I just prefer watching them later. I really enjoyed this video btw!

  • @stjut
    @stjut 3 роки тому +9

    Enjoyed watching the recording. So interesting and enlightening. Thank's Stu.

  • @infinitel00p94
    @infinitel00p94 11 місяців тому +8

    LOVE your book Brian! please keep doing these podcasts

  • @joshfredr7846
    @joshfredr7846 3 роки тому +10

    Dr. Brain Greene is such an interesting and fascinating speaker. I love listening to anything he has to say.

  • @Necrozene
    @Necrozene 4 місяці тому +1

    I am very pleased that I reserved time to come back to Brian Greene. I was on a Susskind/Penrose trip for years, now this is delightful after-dinner conversation. Loving it fully.

  • @jessicaknapp1211
    @jessicaknapp1211 10 місяців тому +7

    Brian Greene I am ridiculously late finding this awesome video of yours, but id absolutely read that possible future, (maybe current?) book of yours. sounds amazing! Thanks so much for all the enlightening amazing info you have shared.

  • @MrRatboy69
    @MrRatboy69 3 роки тому +1

    Thanks for all you do!

  • @5nwCr45h
    @5nwCr45h 11 місяців тому +1

    There are no words for what you are doing here. This is an exceptional interview and discussion on consciousness and love. Please introduce a full 'soup-to-nuts' World Science U course on Quantum Mechanics! It would represent your magnum opus for the inspiration it will provide for future Newton's and Einstein's and the advancement of science, mathematics, and humankind. There are no words for what you have and are providing here-effectively real-time discussions with Einstein and Newton . And yes, turn "Icarus at the Edge of Time" into a 'full-fledged book' and learning website!

  • @dwayneduval6785
    @dwayneduval6785 3 роки тому +3

    This episode was great.

  • @bikashthapa7316
    @bikashthapa7316 3 роки тому

    always love to hear from you

  • @heatherj5033
    @heatherj5033 3 роки тому

    Filling my mind full of knowledge that I can't even comprehend! Totally wish my mind worked like this! Fascinating!

    • @grantf6687
      @grantf6687 10 місяців тому

      Don't worry he doesn't comprehend what he's saying either. It's all a part of the materialist act. He has no idea how anything in reality works at all and is very confused. Facts
      The things he's talking about don't need to be comprehended most of the time. And when they do it's only because he's so far from the truth.
      This is why science is become like a religion. Following fools liek this guy who thinks he's smart.
      Without consciousness your intelligence can go in the toilet as far as im concerned.

  • @tadeth
    @tadeth 3 місяці тому

    It’s good to listen to a legendary person of honor who lived through Albert Einstein, and mentored his scientific achievements as a student of geniuses such as Paul Dirac. Amazing!!

  • @kagannasuhbeyoglu
    @kagannasuhbeyoglu 3 роки тому +1

    Thanks a lot WSF + WSU :)
    Great video👍

  • @RobLarkins
    @RobLarkins Місяць тому

    What a compelling guest and some fantastic questions. This ep was so good!

  • @RobLarkins
    @RobLarkins Рік тому +8

    I watch live every chance I can which isn’t as often as I might like, but I’ve never missed an episode. I usually watch each ep at least 5 times. Some even more.

  • @RealDonfromBroward
    @RealDonfromBroward 4 місяці тому

    Truly appreciate this video. All of it. Thanks.

  • @pinataparty
    @pinataparty Рік тому +1

    Best channel ever!?! great vid!

  • @silvershadow013
    @silvershadow013 3 роки тому

    I'm hoping the new time slot will be later in the day or a weekend only because I will be going back to work during the day. I do watch afterward if I miss it, but really enjoy the live sessions. Be well.

  • @johnjobs3027
    @johnjobs3027 3 роки тому +5

    Many thanks to you Dr Greene and your colleagues for your time and passion . 👍🇨🇦

  • @glennh8185
    @glennh8185 2 місяці тому

    i just saw this now and its made me really think. keep it up dr greene

  • @mikaelkaris9273
    @mikaelkaris9273 9 місяців тому

    Im just average joe from Finland 🇫🇮.
    53 years, I am in methadone treatment cause I m addict. I shouldn't understand anything about fysics, cause I have heavy machinery education behind me from years 1986-1988. I am ok mechanic, but I have constant thirst for knowledge.
    And as Finnish, English is my third language, so one more curveball to me learning from your lectures. But I do learn, amazing. Thank you Brian for bringing science to ordinary people and explaining things ,,,,hhm,, the way they are easiest to understand even someone who is not fysisist. About your math formulas I dont understand anything, but in many levels I learn a lot.
    Thanks also for WSF, that way anybody can learn lot if only one wants to.
    For my part, I live in Finland and we have great education system, and over all we are at age 15 same level than US students at age 17-18,
    Thanks mr Green for everything you have done to science.
    Mikael from Finland 🇫🇮

  • @nicholasperry2380
    @nicholasperry2380 4 місяці тому

    £ years on and at 1M views so yeah, I think it's well worth your time in the long run. I've just ordered your book too. Thanks to you both for taking the time to share your knowledge. I can't imagine how much your time is worth but I am truly grateful. Thank You.

  • @viewer3091
    @viewer3091 3 роки тому

    Thanks Brian.

  • @candidobertetti27
    @candidobertetti27 Рік тому +3

    Loved it. Specially the q/a solo part, you're such a brilliant man. Thank you Brian.

  • @lindaocean6858
    @lindaocean6858 3 роки тому

    lovely discussion thank you

  • @user-bv8ts9go4f
    @user-bv8ts9go4f Місяць тому

    yes
    thank you

  • @center__mass
    @center__mass 2 місяці тому

    Brian sharing his time is the one thing I miss about covid

  • @miguelfuentes6956
    @miguelfuentes6956 3 роки тому +1

    Hi Brian, Miguel again, from Puebla :D Happy to see you again!!

  • @1teaseup
    @1teaseup 3 роки тому +3

    I've so enjoyed. Relevant especially when it's needed most by individuals.

  • @terrabusinessLLC
    @terrabusinessLLC Рік тому +1

    Brian...I definitely would read your book for children.
    And here is a twist regarding Tachyons....
    I am thinking about this scenario since I was a little child myself.... Decades ago...
    Here it is
    You receive the result of "having" fired your tachyon gun ON YOUR OTHER HAND and THEN CHANGE YOUR MIND...... AND DON'T PULL THE TRIGGER.... VOIALA....A PARADOX...
    LOVE YOUR TEACHINGS

  • @oneshot2028
    @oneshot2028 3 роки тому +3

    1:45:56 - Great point. Thanks for telling this. This is one of the most misunderstood things in physics. Most people think observer means a sentient being.

  • @triminh3649
    @triminh3649 Рік тому

    love is a bond of connection to help us survice with each other

  • @colbynye5995
    @colbynye5995 3 роки тому +5

    This was fantastic! Thank you both for sharing!

  • @antoniosalvador9754
    @antoniosalvador9754 3 роки тому

    thank you

  • @munderlarkst
    @munderlarkst 3 роки тому

    Something (among many things) I've never understood:
    If someone is sitting in a chair, is that person still 'moving' at the speed the Earth is rotating on its axis? Or, at the speed the Earth is moving around the sun? And/or, at the speed at which the Earth is being carried along by the expansion of the universe? (Are the above speeds added together to get the 'real' speed of the person sitting in the chair?)
    And, if the person in the chair were to stand up and start walking at 1 mile/hour, would that person then be moving at the speed of (the Earth's rotation on axis/or around the sun/or the expansion of the universe, etc.) plus 1 mile an hour?
    Also, I wonder, whatever the 'correct' speed is, is that the speed at which we (or at least the person sitting in the chair, etc.) experience time on Earth? Thank you.

  • @johnp1
    @johnp1 3 роки тому +10

    Dr. Greene, thanks again for a great session. Answering your questions: It's a good idea to have a guess from time to time. I'd love to see a full course on quantum mechanics. Live session on Thursdays is good.

    • @JamesEIvoryIII
      @JamesEIvoryIII Рік тому

      My “guess” is that your idea would enhance what is a baseline, wonderful experience. I think that Brian is a fantastic host, adding a guest, in my view, is a force multiplier- fantastic^2 🥂😎🤵🙇‍♂️
      0030 hr.s CST
      Regards,
      -J

    • @JamesEIvoryIII
      @JamesEIvoryIII Рік тому

      @@Bibibosh 🤣 (a sandwich 🥪 in Planck-time at a Planck-length upon the Wavefunction collapse lest the potential banana split emerges, adding to my newly emerging corpulence).😂😉🐬

    • @grantf6687
      @grantf6687 10 місяців тому

      I'd LOVE to have a debate with him on quantum anything.

    • @grantf6687
      @grantf6687 10 місяців тому

      @@Bibibosh well it's not but you can't have morons trying descrive how reality works and the universe, when they really have no fucking idea wahtsoever and just pulling shit out their ass. Consciousness is only understood from a spiritual persons experience.

    • @ronaldgreene5733
      @ronaldgreene5733 2 місяці тому

      Should chemistry be denied in the ready conversion of H1 to H2 merely because H2 is difficult to detect in any direct manner in space? A paper by Canadian astronomer Paul Marmet essentially collapsed the "Big Bang" back in 1990 as he theorized the existence of intergalactic and interstellar matter as the cause of redshift rather than a doppler effect -- and accounting for anomalies much more effectively, before the discovery of the abundance of H2 throughout space, though primarily ignored by the necessities of money and career support. An abundance of H2 throughout space in a gradient that will extend to meet that of our galactic neighbor, will also account for the gravitational anomaly where the outer arms of our galaxy rotate at nearly the same rate as the central region. Quantum physics is great, dare I say so before I have dived into the math. However math hasn't actually proven the existence of dark matter, no matter how sophisticated the math is or can be. Circular reasoning isn't somehow justified if you add decades of career building and funding requirements and the consensus building that takes place over time that takes on more precedence than any math in support . .
      A much greater quantity of H2 in the presence of H1 is the natural result if we acknowledge basic chemistry, exceeding the mass of the visible component of the universe and which must be ignored to maintain control over the narrative and our inability to think and take a risk without group oriented behavior and identification in support.

  • @DoctorCool2u
    @DoctorCool2u Рік тому

    In order for light to maintain the universal speed limit if time slows down space has to expand. In the regions of space that are expanding time has slowed down and light is traveling at a constant velocity. At the event horizon of a black hole space has been stretched so far that light and time would appears to have stopped.
    Gravity waves show that space can be stretched or compressed. Just wondering if these are valid perspectives.

  • @georgiasmyrniou6337
    @georgiasmyrniou6337 10 місяців тому +1

    Please do books for middle school.
    My students seem not to understand theories explained in the current ones about quantum physics . Hope you do 😊

  • @IndranilBiswas_
    @IndranilBiswas_ 6 місяців тому

    Brian Greene is such a good educator and man of science.

    • @IndranilBiswas_
      @IndranilBiswas_ 6 місяців тому

      Any more conversations with Sean Carroll? And can you have one with Elon Musk!!!! TY.

  • @aseshbasu4816
    @aseshbasu4816 3 роки тому +1

    Brian Greene is EVERGREEN!

  • @user-hy3fo2tk3f
    @user-hy3fo2tk3f 3 місяці тому

    Interesting to have the fortitude to stick with it at the time, congratulations!

  • @sirvapalot
    @sirvapalot 3 роки тому +1

    you may be a mere mortal Brian but i appreciate your mission to educate the public about science, i may have trouble understanding some of what you talk about, but i really enjoy science content on youtube.

    • @grantf6687
      @grantf6687 10 місяців тому

      the only reason you cant understand things he says is because he doesnt understand and he's WRONG, and he's just using words to sound intelligent and all of you must be fools to think he's wise. Wisdom is exactly what he's lacking.

  • @rozbrkit4985
    @rozbrkit4985 Рік тому

    REGARDING your camera focus issue: a simple tip would be to do this before you begin:> You set the focus of the camera to a point behind you by a foot or so or in this case in your video here, to the winow frame behind you, this ought to bring everything in front of that focus point into focus that will/should look clear at all times. if you have focused the camera at a focus point that is in front of you, or even your chair, you may find you will move in or out of focus. this is a basic rule with video cameras, especially in interview settings. therefore allowing for full gesturing & Fidgiting to stay in focus. This minimal preperation is something you should check everytime you sit to record and transmit live or record streams. Now chances are you already found this "Tip" out since this broadcast? As i stumbled upon this live stream two years after you posted it on you tube, which by the way was excellent. if not i wonder if you will find this info i offer. do you have notifications active on your old broadcasts? eitherway i will probably never know. n'er mind. hope you figure it out, or you've been told already.

  • @garytoller9423
    @garytoller9423 3 роки тому +3

    Belatedly found and enjoyed these 3 hours. Question!- Did the annihilation of matter and antimatter have any significant affect on the properties of the early universe?

  • @isonlynameleft
    @isonlynameleft 5 місяців тому

    I love this channel but UA-cam wants me to listen to this same episode five times a week!

  • @frankyw8803
    @frankyw8803 3 роки тому

    Can anyone tell me the title of the music that usually plays after WSF video's ? TIA .

  • @christopherparsons7038
    @christopherparsons7038 9 місяців тому

    Mr. Greene. There are so many items (videos) with you in them and bringing us some of the best discussions and thoughts. Thank you. I wonder if the acceleration of the universe has stopped and we're just catching up with it. I wonder if it stopped at the speed of light. I know that suggests a boundary. But the fastest particle we have is a photon. The (accelerating/accelerated) universe must play some role in that speed. As it does now to suggest a better description of 'gravity, in that the expansion of the universe is playing a part _in_ the (new) theory of gravity. If there is no other particle faster than the photon would that not suggest a limit to the acceleration and if that then at some point a _halt_.

  • @johnjobs3027
    @johnjobs3027 3 роки тому

    A question : Is vacuum energy considered in conservation law of energy. It seems to me that it is created as space expands., which would then violate the law. On the othrr hand, if it is not created then where does it exist prior to expansion of the space it is contained in.

  • @brettonwoodsvsbtc1217
    @brettonwoodsvsbtc1217 3 роки тому +5

    Wow fresh air. I just come off a pod cast from Dr Albert where the Dr talked around the issue never arriving at a cemented view or opinion. This feels like fresh air in comparison and thank you to you both for entertaining concise content that is easy listening informative and explanatory. Loved listening to this content. More please more

    • @realeyesrealizereallies6828
      @realeyesrealizereallies6828 Рік тому

      Dr Albert was more in line with reality, we are children, and have a long way to go before arriving at any worthy cemented views or opinions...

  • @eransinbar8628
    @eransinbar8628 3 роки тому +1

    If space time is quantized to 3D units in the size of Plancks length in each dimension , can we assume that the space between the units is another grid like non local dimension?can it be responsible for the EPR quantum entanglement " spooky action at a distance" ? - Eran Sinbar , Israel

  • @Shalomjoyyy
    @Shalomjoyyy 3 роки тому +1

    I’ve tested the Mpemba effect on water a few times. It always holds up. Very interesting.

  • @miaa7887
    @miaa7887 3 роки тому

    Can you debate with Mr Ken wheeler who is the master of magnetism ,I need some more clarity., Also at what point do you consider where you are looking inside the body or outside the body? Thank You for your time M

  • @JamesEscobar
    @JamesEscobar 3 роки тому +6

    Dr. Greene thank you so much for spending time creating and contributing content like this! Your channel is amazing!! And life changing!

    • @waynefarley87
      @waynefarley87 3 роки тому

      Dr. Greene, just a great 3 hours. Dialogue with Adam Reiss was education as well as a great mind exercise. You are so very VALUABLE to many many for some sanity and reality and it’s beauty and shortcomings. Thanks again

  • @kusumkantasaxena5440
    @kusumkantasaxena5440 2 роки тому +1

    What an enlightening session.i am so much fascinated by the enigmatic cosmos . Basically i am a chemist getting interest in the physical and philosophi cal aspects of matter in the universe.thanks for this q/a session

  • @cyrus05w
    @cyrus05w 3 роки тому

    At 27 minutes 22 seconds, Perhaps it's not mentioned although I wonder of obscurities and how these are handled between here and there. For what of this do you do in order to handle such inaccuracies occurring if noticed. I mention this for thy trouble having in locating any research done into color change and/or parallel light Axiall's. If necessary please take time to ponder my question or Statement however you take it. Also in case I make no further comments in this Video thank you for your time and efforts. PS this is in regards beyond a prism in case this is not clear.

  • @markradcliff2655
    @markradcliff2655 3 роки тому

    St.louis, Mo. area. Does anti matter and its large family of particles point to a polar cosmos. Whereby the ambient potential charge difference is part of the charge distribution symmetry that is the foam, pressure, resistance, field effect etc. and or the opposition that is pushed against by mass to create a curved space time fabric? Thankyou for your show. It is truly inspiring. Please excuse my question if it is unreasonable.

  • @jurisbogdanovs1
    @jurisbogdanovs1 3 роки тому +3

    Hey, Professor Green! I have written a book about Vacuum or how to prove that there is no such thing as Matter-free area anywhere in existence and it is impossible to start with. Vacuum turns out to be the most important question in Cosmology, as it affects our understanding of Light and Magnetism and Gravity... And yes, this topic was rejected by your journal Annals of Physics. No worries, I gave reference about it in my book. The title of the book is - The True Essence of Vacuum. In this book I also prove that Time Dilation is pseudo science and General Relativity itself has been ignored when considering it...
    Then I published another book. It is about all problems with Redshift and Doppler's Shift. And this too was rejected by your journal. I prove in this book that Doppler's Shift has never been reliably tested, if we speak about truly reliable tests. And it might be that Redshift is caused by a distance from the object and not from its velocity of moving away from the observer. That will kill expansion of the Universe, Big Bang theory, Dark Energy ideas etc... Title of this book is - Redshift, Nature of Light, Dark Energy.
    And yesterday I finished the book titled - Hollow Earth Theory Told as Never Before. In it i explain how hollow earth is possible according to existing laws of physics and experiments prove that it is possible in theory. Also, I look at what are legends about the hollow earth and what interesting facts these stories tell...

    • @foxjerseycol4433
      @foxjerseycol4433 3 роки тому

      Hi, you have my attention.
      I ask if you may send me a free book ?

    • @jurisbogdanovs1
      @jurisbogdanovs1 3 роки тому

      @@foxjerseycol4433
      Sorry, have no means to send free stuff to people right now. Kindle versions cost 3 gbp or around 5 or 6 dollars anyway. And I don't send word or pdf formats as then the book ends up for free all over the place.

    • @jurisbogdanovs1
      @jurisbogdanovs1 3 роки тому

      @Ethernos Grace
      It is true and it will be proven. Relax.

    • @jurisbogdanovs1
      @jurisbogdanovs1 3 роки тому +1

      @@foxjerseycol4433
      All right! I decided to share one of my books with the world fro free. It is about the True Essence of Vacuum. Do you still want it? I only will need to do some light changes to it and it will take at least a week as I am working right now. If you want it, we will have to figure out how to send it to you.

    • @jurisbogdanovs1
      @jurisbogdanovs1 3 роки тому

      @Ethernos Grace
      Would you also want my book about the True Essence of Vacuum?

  • @YouGoneMad
    @YouGoneMad Рік тому

    So if I am understanding Brian Green'e explanation of knowing how to travel to the future by traveling away from earth and then back again allows us to travel to the future, then would that mean that without some type of instantaneous travel, that it would then be impossible for a multi-galaxy civilization to exist in theory due to the constant flow of time due to the time it would take to travel back and forth (again without an instantaneous form of travel) because years could literally fly by depending on the location of say two planets attempting to send supplies to each other in a realistic frame of time to meet the needs of the populations of the two places? In other words, one planet could put an order in for supplies, and by the time the transport ship went back to the original planet, gathered supplies, and flew back, in theory those people could have died off years ago by the time your transport got back? Did I explain my thought correctly?

  • @aminkanji8501
    @aminkanji8501 2 роки тому

    Enjoyed it

  • @marcopaluszny
    @marcopaluszny 3 роки тому

    From Colombia, could you describe what is, and how work standard candles?

  • @StaticBlaster
    @StaticBlaster 4 місяці тому

    I hope Dr. Greene is writing another book. I would definitely read it.

  • @chrisbronow3292
    @chrisbronow3292 3 роки тому

    It was cool to wake up to this

  • @ricktaylor7648
    @ricktaylor7648 Рік тому +1

    Yes...that book would be cool for kids and adults

  • @justinrabo5795
    @justinrabo5795 3 місяці тому

    Could the current understanding of the expanding universe simply the universe trying to implode on itself yet the tightly packed elements(galaxies) are repelling from one another thus locked in a current similar to "hot to cold water" but on a universal scale?

  • @elidadia
    @elidadia 3 роки тому

    perfect question right there 42 min

  • @jdickson242
    @jdickson242 10 місяців тому

    Questions and wacky thoughts
    Could the observable universe ( not the whole universe) actually be collapsing and accelerating inside the event horizon of a black hole? Meaning we are inside the event horizon inside the black hole. My reasons;
    1 - The observable universe is expanding or is it infact being stretched and accelerated towards singularity. Matter closer to the singularity looking out would perceive the matter further out to be moving away.
    2 - Being inside a black hole event horizon would explain why we think there is more matter. We cannot see beyond the horizon.
    3 - "Everything would be really fast and chaotic?" Would it ? If time dilation is a real then our perception of what is happening counts for very little. To the universe it could be the blink of an eye. But to us and as we accelerate even more toward singularity, time would slow proportionally.
    4 - Our big bang - Could this have been passing through the event horizon. Compressing matter to a state that it has ignited the observable universe and stars we know .

  • @rozbrkit4985
    @rozbrkit4985 Рік тому

    i just ran a comparison with other videos and i first noticed that this video is only accessable in 720p & no HD in sight? which could account for its "condition" but i id notice other issues with other videos from the same location..... sorry but i most likely will be splatering comments all through out yur viddeos, i may be the only person in "this timeline" as this happens?

  • @DiscoGreen
    @DiscoGreen 11 місяців тому

    @ 2:25:20 you talked about invariants and c being same.. but Einstein wrote many times how he postulated c was variable. But the ruler (distance c..) and the cesium second ( measured with c) ⏲️ both shrink and change regardless of inertial frames.. How can you prove it IS invariant over it isnt?

  • @YourDailyFae
    @YourDailyFae 4 місяці тому

    This has probably already been proposed however, how would we be able to study/observe if string theory is describing the physics of another universe?

  • @espaciohexadimencionalsern3668
    @espaciohexadimencionalsern3668 3 роки тому

    Around 1:42 you speak of BH. could you tell me why stars dont follow same orbit? some go left while some go right, others go down and some go up. - Why do stars near the BH just dont clump into one another and make a bigger star? - why do stars dont get the jump in speed at the same spot spetially an orange one that speeds way up far to the right from the BH spot?

  • @RayRay-ex9gc
    @RayRay-ex9gc 3 роки тому +11

    Northern Kentucky ! Green for president 2020 !

  • @TDQ_Gaming
    @TDQ_Gaming Рік тому

    If the CMBR is the same in every in direction, wouldn't that imply either we are in the center or it's more an observable artifact of where space is approaching the speed of light as it moves away from us?

  • @RichardFranksricktheslickster
    @RichardFranksricktheslickster 3 роки тому +16

    Hello Mr. Green, I just wanted to comment on how cool this is to be able to share time with a great particle physicist (I think that is your field of study) such as yourself. I would have never thought I could get so close to you to where it would be possible you may answer I question I may have. Thank you for your time and effort.

    • @murlidharkhatkale5208
      @murlidharkhatkale5208 Рік тому +1

      Ira is

    • @QuaaludeCharlie
      @QuaaludeCharlie Рік тому

      The bible says nothing about movement because the Earth doesn't move, revolve or rotate.
      It's perfectly still.
      We inhabit a motionless realm covered by an impenetrable dome.
      We use gas pressure to debunk space that directly represents the heliocentric model.
      Space is a direct violation of the 2nd law of thermodynamics.
      Using science to disprove the heliocentric model is the best way to get people to learn the truth.

    • @callumprewer9574
      @callumprewer9574 10 місяців тому

      ​@murlidharkhatkale5208

    • @ronaldgreene5733
      @ronaldgreene5733 2 місяці тому

      Should chemistry be denied in the ready conversion of H1 to H2 merely because H2 is difficult to detect in any direct manner in space? A paper by Canadian astronomer Paul Marmet essentially collapsed the "Big Bang" back in 1990 as he theorized the existence of intergalactic and interstellar matter as the cause of redshift rather than a doppler effect -- and accounting for anomalies much more effectively, before the discovery of the abundance of H2 throughout space, though primarily ignored by the necessities of money and career support. An abundance of H2 throughout space in a gradient that will extend to meet that of our galactic neighbor, will also account for the gravitational anomaly where the outer arms of our galaxy rotate at nearly the same rate as the central region. Quantum physics is great, dare I say so before I have dived into the math. However math hasn't actually proven the existence of dark matter, no matter how sophisticated the math is or can be. Circular reasoning isn't somehow justified if you add decades of career building and funding requirements and the consensus building that takes place over time that takes on more precedence than any math in support . .
      A much greater quantity of H2 in the presence of H1 is the natural result if we acknowledge basic chemistry, exceeding the mass of the visible component of the universe and which must be ignored to maintain control over the narrative and our inability to think and take a risk without group oriented behavior and identification in support.

  • @Getsmore
    @Getsmore 10 місяців тому

    One of the few that still believe old world sciences. God boy for thinking the way the government trained you to live your life. 👍👍👍👍

  • @dntdenyitcolombia6910
    @dntdenyitcolombia6910 3 роки тому +2

    So informative wisdom is music to my ears. Thank you so much for this enrichment

    • @grantf6687
      @grantf6687 10 місяців тому

      LOL. yeah no
      Off to church for you

  • @mikechaisson9875
    @mikechaisson9875 3 роки тому +1

    Wow! I really love your view/explanation on the Boltzmann brain. Brian Green you rock! Thank you very much for all your precious time.

  • @cesarjom
    @cesarjom 4 місяці тому

    I agree that the next revolution of modern physics is in the fundamental understanding of spacetime. Is spacetime an emergent property of something more fundamental that has not yet been observed or theorized? Will we find there how the quantum fields finally interact with gravitation effect of spacetime (such as inside black hole event horizons) and/or how to bring all four fundamental interactions (strong, weak, EM and gravity) into one unified theory?

  • @JTWHITE2
    @JTWHITE2 Рік тому

    Simply. Brian Thank you. Orl.Fl. 10 1 22.

  • @kaliy5975
    @kaliy5975 9 місяців тому

    I enjoyed what you have siad

  • @jamesa4566
    @jamesa4566 3 роки тому

    Brian. Thank you. Adam is a wonderful person to listen to and so honest/articulate/down-to-earth. And of course so are you. My only gripe is that I would prefer people in science to refer to the speed of light (causality) to be absolute and factual. Much like evolution. Please don't entertain unknown physics.

  • @njsriram
    @njsriram 4 місяці тому

    for his answer to the question on Dark energy and extra dimensions that we don't see, is that due to the current evolutionary stage? like our eyes have evolved to view 3D spaces where as probably after a millennia or so humans would have evolved biologically or technologically to understand or see the extra dimensions.

  • @rgmartinez
    @rgmartinez 3 роки тому +4

    Question: If the space-time between the Earth and the Moon is expanding with increasing acceleration, why is the distance between these two objects more or less constant? Note that their attraction due to the gravity shout,d be constant or decrease, correct?.... Thanks!

    • @achilles6744
      @achilles6744 3 роки тому +3

      The space time between the earth and moon isn't expanding because they're gravitationally bound. Even solar system, galaxies don't expand within themselves. Expansion occurs on a large scale for example between our super cluster of galaxies and another distant supercluster. Gravity would negate any effect exerted by the expansion within these bound structures. Infact moon is slightly moving away from earth but for a different reason. I hope this helps.

    • @TimothyWhite360
      @TimothyWhite360 3 роки тому

      Whats your thought on Monds theory?

    • @rgmartinez
      @rgmartinez 3 роки тому +1

      ​@@achilles6744 Thank you for the insight but I do not think it is so simple... My understanding is that space-time expands everywhere, like the dots on a balloon that is exponentially increasing its volume. We are not at the center of the Universe. So, if it is expanding inside my body and between the Earth and the Moon as commented, what are the consequences? does that align with our current theories? (I know the moon is moving away slowly but did not want to complicate my question)

    • @ronaldgreene5733
      @ronaldgreene5733 2 місяці тому

      Should chemistry be denied in the ready conversion of H1 to H2 merely because H2 is difficult to detect in any direct manner in space? A paper by Canadian astronomer Paul Marmet essentially collapsed the "Big Bang" back in 1990 as he theorized the existence of intergalactic and interstellar matter as the cause of redshift rather than a doppler effect -- and accounting for anomalies much more effectively, before the discovery of the abundance of H2 throughout space, though primarily ignored by the necessities of money and career support. An abundance of H2 throughout space in a gradient that will extend to meet that of our galactic neighbor, will also account for the gravitational anomaly where the outer arms of our galaxy rotate at nearly the same rate as the central region. Quantum physics is great, dare I say so before I have dived into the math. However math hasn't actually proven the existence of dark matter, no matter how sophisticated the math is or can be. Circular reasoning isn't somehow justified if you add decades of career building and funding requirements and the consensus building that takes place over time that takes on more precedence than any math in support . .
      A much greater quantity of H2 in the presence of H1 is the natural result if we acknowledge basic chemistry, exceeding the mass of the visible component of the universe and which must be ignored to maintain control over the narrative and our inability to think and take a risk without group oriented behavior and identification in support .

  • @dr.lairdwhitehillsfunwitha67
    @dr.lairdwhitehillsfunwitha67 3 роки тому

    Thanks. Very interesting. And useful. If only I was teaching a live class now.

  • @stephenjones796
    @stephenjones796 3 роки тому +2

    Would be very interested in any sci-fi /sci-fact publication you put forward ! Thanks Professor.

  • @kblodg5
    @kblodg5 Рік тому

    If things are given mass by interaction with the Higgs field, and then space expands (reducing the concentration of the Higgs field), would that explain the counter balance to gravity and account for the acceleration? Would also seem to explain the tiny tiny 10^-25th size values. Of course that would mean newer things should have minutely less mass its older counterpart would.

  • @vazap8662
    @vazap8662 3 роки тому +3

    The discussion was fantastic, as wella as your Q/A. Thank you!!!

  • @katiekat4457
    @katiekat4457 3 роки тому

    I didn't hear your dog barking when you said he was but I think it's so cute when he's running around outside in the yard behind you. I didn't see your dog today but I think it was your last video that I saw him. Could even have been an earlier video than that.

  • @sherrymanning1116
    @sherrymanning1116 3 роки тому

    Your so smart ty listen to you it is so helpful to keep my mind from freaking out I have stupid mental diseases thank you so much

  • @IndranilBiswas_
    @IndranilBiswas_ 5 місяців тому

    We were all given our Newton moment - what a great reference! This is the 3rd time I am watching this video!