The Mystery That Keeps Neil deGrasse Tyson Up At Night

  • Published: 06 January 2018
  • There's one terrifying mystery of the universe that astrophysicist and 'Astrophysics for People in a Hurry' author Neil deGrasse Tyson loses sleep over.

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Comments • 9 821

  • Daniel Vazquez Martinez
    Daniel Vazquez Martinez  21 hours back

    He is having an out of body experience... that is passion for your trade, at its best.

    • Mayukh Sen
      Mayukh Sen  1 days back

      Well first of all the thing that's called dark energy, is causing space itself to expand uniformly, so the ratio of the relative distance between everything will remain relatively unchanged.

      If space is expanding itself, it doesn't mean new space is being created, which means light will still travel at the exact same speed relative to our perception, so basically light gains speed relative to the expansion of space itself, even if the space is being expanded.

      It's not just the space itself that's expanding, every part of space is expanding, we ourselves are a part of that space. Aren't we? Yep.

      So galaxies won't be getting any further away from us. They will still be the exact same distance as they are now.

      Because this expansion is uniform in nature.

      Also Space itself is so vast that the rate of this expansion is very slow, the next generation of cosmologists and astrophysicists will never see galaxies running away from them that's stupid.

      Why would Neil say shit like this in public?

      • Mayukh Sen
        Mayukh Sen  1 days back

        @TIRTHANKAR ROY I was shooting in the dark in a YouTube comment section precisely because I could clear my doubts after some fellow enthusiast comes to correct me on the subject, yep I would like further discussion thank you very much.

        So is space expanding uniformly?

        What's the rate of acceleration of the expansion? Give or take...

        If the space is expanding, does that mean new space is being created? Or is the space just changing its shape and getting thinner? I hope you follow me.

        I actually watched a kurzgesagt video very recently where they say the most cutting edge research dictates that Space itself is being created every second as space is expanding. And that space itself might contain dark energy, or be the source of dark energy. So what does your university teach you about that?

        Still with me? Thanks a lot.... The final question, which university do you study in and what are the best books that you recommend for the ABC knowledge on cosmology and astrophysicz for a total novice like me.... Thanks in advance.

        TIRTHANKAR ROY  1 days back

        The fabric of Space and Time is expanding and its rapidly. You check the Red Shift Occurence and calculate the distance with DecaLo Theorem of Hibbs. I'm Astrophysics Student. You can clear your doubts.

        TIRTHANKAR ROY  1 days back

        You mean galaxies are expanding too? 😂😂😂 Bruhh. Intergalactic distances are expanding. Not any Matter in it. Else Earth, Jupiter all moons, all nebulae would have expanded too. Its just Stars that expand and then collapse to Black holes or dying stars. Hence Neil is 100% correct.Galaxies will expand beyond horizon. Only Earth won't even exist by then after Sun engulfs it.

    • LCD LSD
      LCD LSD  3 days back

      "Demon eye" Stephan

      • 1YangYing
        1YangYing  3 days back

        Could he BE any more pretentious

        • 724tomjohnston
          724tomjohnston  3 days back

          I don't like him.....................he said Pluto is NOT a planet!!!

          • Andrew Vanderbilt-Astor

            I love all his space related ties.

            • Purple Flame Tarot
              Purple Flame Tarot  4 days back

              It's not often "intellectuals" have such an amazing sense of humor! Wonderful ❣️

              • Pastel Assassin
                Pastel Assassin  5 days back

                Isnt it more interesting having a rolling wave of celebration for new years, rather than having part of the population forcing it at their 11AM?

                • Kevlar Burrito
                  Kevlar Burrito  5 days back

                  8:18 Stephen: "Oh. My. God...!"

                  • Sailor376also
                    Sailor376also  5 days back

                    Midnight of January 1st the brightest star in the heavens is exactly at meridian. Sirius. Astronomically,, that is why January 1st is the New Year

                    • Elmo G.
                      Elmo G.  5 days back

                      Last 3 minutes was the best. I'll be contemplating what he said. Deep

                      • Gabriela Perez
                        Gabriela Perez  6 days back

                        i love his tie

                        • Libertatem
                          Libertatem  1 weeks back

                          Neil is just a sell out so call scientist. He's an imbecile.

                          • B Dre
                            B Dre  1 weeks back

                            🙂 = 💥

                            • aei -
                              aei -  1 weeks back


                              • Diante Davis
                                Diante Davis  1 weeks back

                                We are that generation

                                • Debbie Trudeau
                                  Debbie Trudeau  1 weeks back

                                  Am I wrong to think that if there was a significant part of the universe that was visible in the past but has been "ripped from our horizon" there would be written accounts of it?? Just as, if this "dark energy" expands so much and so fast that our future generations won't be able to see all the galaxies we can see now, they will at least know they were there from OUR written works??

                                  • Alec Astle
                                    Alec Astle  6 days back

                                    Now what is more amazing to notice is that it will only happen if we are almost this much advanced in technology in the coming generation that we are today and we our unable to convey them what we know today.

                                    Now if humanity existed for very long technology and all will grow exponentially forward and maybe future humans will know much much more then we know now about Universe even if they dont had our records of past traced universe.

                                    So,the only way i think is if there is some loop for life on Earth like if humans got extinct of course the record will be gone but the life reorginates as loop and there we go humans again or maybe who know what kind of organisms this time are studying Universe considering it as much as Our Milky Way Galaxy as everything else is now not observable due to expansion. this gives me chills.....

                                  • Debbie Trudeau
                                    Debbie Trudeau  6 days back

                                    @Samm Two things here. First and most important: Thank You !! For the reply and the manner in which it was given. I appreciate it quite a bit as I like to learn new things. Second - now that you've written it out like that I feel a little chagrined. You're quite right about the time issue and I should have either known or surmised that. I imagine it's a human superiority trait to forget that there WAS a time when the earth, the galaxies and the universe existed without us! I'll tell you ...I was an excellent student in school and was one of the annoying kids that actually enjoyed it (not math! although I always end up working in accounting or banking!) but it may be that learning is more appreciated by adults. Thanks again.

                                  • Samm
                                    Samm  7 days back

                                    You are but it's completely understandable. The problem here is the massive timescale that we're grappling with. Humans have only been on the earth for maybe 100,000 years or so and our written accounts if I'm being generous would be maybe 10,000 years old and they're spotty at best. You'd get more consistent records of written knowledge the closer you arrive to present day. Point being that our human written accounts reach back to only a tiny sliver of history in the universe's timescale of 13 billion years or so. Humans weren't around when the earth was filled with dinosaurs or before the dinosaurs when the planet was dominated by giant insects. There's also plenty of history that our little solar system has missed completely as our planet is only about 4.5 billion years old compared to the 13 of the universe. Anyways, hope that helps :)

                                • pimp daddy jones
                                  pimp daddy jones  1 weeks back

                                  dont get high and watch neil degrasse tyson, you will lose your shit

                                  • Sub
                                    Sub  1 weeks back


                                    • Xiphactinus
                                      Xiphactinus  1 weeks back

                                      4:15 saliva or a piece of foodflew out of Neil's mouth
                                      4:16 Colbert noticed it
                                      4:21 you can spot it on the table
                                      5:26 Colbert discretely wipes it away with the paper

                                      • DVendy
                                        DVendy  2 weeks back

                                        “We don’t know what we don’t know”

                                        sums up my math knowledge

                                        • Vaimiim Ciim
                                          Vaimiim Ciim  2 weeks back

                                          7:11 oh o. me before sleep watching space stuff

                                          • Acus9999
                                            Acus9999  2 weeks back

                                            Holy fucking shit.
                                            I dont want to discredit Neil, but if he's saying is true.
                                            Then it could explain a lot of things.
                                            One, why we havent seen aliens.
                                            Maybe they've made contact in the past, went back to their galaxy and they drifted away, unable to return. Or hell we drifted away from them.
                                            Two, what if we're drifting? What if we have somw type of special ionization or element in our galaxy that is causing us to move away from other galaxies? Causing us to not only (like Neil said) lose history about our universe, but we also lose resources.
                                            Bc i bet your ass 99% of the shit that makea earth special came from all other the universe.
                                            And if we lose our connections to other galaxies, we are fucked 100%.
                                            The planet doesnt need to explode ot the sun to die.
                                            We will use all of our resources and everything on the planet will die eventually.
                                            Three, i wanna know why outer space is black.
                                            I could get if its devoid of light, buuuut we have a massive ball of combustible gas on a 24/7 schedule burning like a bulb in the middle of the solar system so....unless we're talking about a system without a sun, i dont buy our system having light deficiency.
                                            And dark matter? From what i imagine, we just arent scientifically prepared for that.
                                            Bc isnt that shjt supposed to be the essence of like a black hole? What if we fuck with it? We just die immediately?
                                            How tf are we supposed to record anything about it, we dont know its properties. We dont know its mass, texture or weight.
                                            We need to know one solid thing, at least and we dont.
                                            So unless we can figure out a safe environment, i say its impossible to study black matter.
                                            But i say it is real, just not without our grasl yet.
                                            We havent unlocked warp drives yet.

                                            • Aaron Harvey
                                              Aaron Harvey  2 weeks back

                                              To me, he's insufferable.

                                              • silas jamal
                                                silas jamal  2 weeks back

                                                Any time ndt proposes a "what if" of sorts, it's always better and more mind blowing than what he said before that

                                                • Frederick Jaramillo
                                                  Frederick Jaramillo  2 weeks back

                                                  i get where ur coming from and it hurts

                                                  • Frederick Jaramillo
                                                    Frederick Jaramillo  2 weeks back

                                                    thanks a lot, Neil...

                                                    • jamaican Indian
                                                      jamaican Indian  2 weeks back

                                                      am i the only one that thinks its possible that dark matter is apart of the 4th dimension that why it so hard to understand or study?

                                                      • jamaican Indian
                                                        jamaican Indian  2 weeks back

                                                        i also think tesseract is wrong as illustrated as the 4th dimension because we can perceive or imagine it. same as how one-dimensional being cant point up.

                                                    • Devika Kaul
                                                      Devika Kaul  2 weeks back

                                                      I love science for its a drug that helps me to travel beyond my petty self.

                                                      • Devika Kaul
                                                        Devika Kaul  2 weeks back

                                                        This astrophysicist just confessed that for all our knowledge of science, we can never keep up with the past nor the future, cause our perception of time is so limited and defined.

                                                        • Le Baron
                                                          Le Baron  2 weeks back

                                                          Someone who gets it

                                                      • Michael Mannucci
                                                        Michael Mannucci  2 weeks back

                                                        Wow, this guy is very passionate about his faith commitments.

                                                        • Ahmad Levi
                                                          Ahmad Levi  2 weeks back

                                                          he's so precious

                                                          • Ermias Mikael
                                                            Ermias Mikael  2 weeks back

                                                            The best comment is ... 'pheew ... I am not gonna get a wink! ... that's crazy!...'

                                                            • N. Kirsch
                                                              N. Kirsch  2 weeks back

                                                              Hi I'm a niel. Do you have any questions youd like to ask?

                                                              • N. Kirsch
                                                                N. Kirsch  2 weeks back

                                                                Read this a couple of times it will hopfully make sense

                                                              • N. Kirsch
                                                                N. Kirsch  2 weeks back

                                                                @Hockstar so my theory, based on my knowlege gained from Mr. Tyson about the helo sphere they simply can't catch up to the tergectury of our sun (and all its planets) path. Now what I'm trying to say, the sun ia floating through space just like everything else. And with my understandings its hard to find earth aince it's moving so fast. Alliens might have tried but a measily spaceship vs a single planet in the vastness of space pretty hard target to hit

                                                              • Hockstar
                                                                Hockstar  2 weeks back

                                                                Where r the aliens

                                                            • Ty Thompson
                                                              Ty Thompson  2 weeks back

                                                              What is the name of the instrumental in the beginning?

                                                              • Random_Shick
                                                                Random_Shick  2 weeks back

                                                                Suppose there is already much much more that has been ripped from the book. Ironic there was speak of Roman Catholic, I'm pretty sure the Vatican holds ALL of these secrets.

                                                                • Mary Snodgrass
                                                                  Mary Snodgrass  2 weeks back

                                                                  I have to agree that it is weird that we don’t celebrate the new year as a whole for the planet, not 24 times not including other cultures of new year celebrations not done on January 1st. Not to put down other cultures new year holidays but maybe picking a day in the year separate from others to be the new year for humans here on earth that we all celebrate at the same time. The next argument in that process though would be when. Lol

                                                                  • Joyal Patel
                                                                    Joyal Patel  2 weeks back

                                                                    This man should have been my physics teacher!!..

                                                                    • conner buchan
                                                                      conner buchan  2 weeks back

                                                                      Can imagine Neil on the edge of his bed at 4 am in galaxy underwear thinking

                                                                      • Kevin Golden
                                                                        Kevin Golden  2 weeks back

                                                                        I'm glad you're losing sleep over God Neil. Just accept God's existence and accept Jesus Christ as your Lord and savior than you'll get some sleep, I promise you.
                                                                        Just make sure it's not some god of your own imagination. That'd be idolatry.

                                                                        • Re Creation
                                                                          Re Creation  3 weeks back

                                                                          I dont like how Colbert is always so competitive

                                                                          • Mr. dopoulopoulopoulos
                                                                            Mr. dopoulopoulopoulos  3 weeks back


                                                                            • Sulabh Parajuli
                                                                              Sulabh Parajuli  3 weeks back

                                                                              "Let me get to the second question with you" neil really is a master at cutting people off!

                                                                              • Mohammed Rayyan
                                                                                Mohammed Rayyan  3 weeks back

                                                                                ALLAH GOD ALMIGHTY SAYS IN THE LAST TESTAMENT THE HOLY QURAN : 73 / 9 ....
                                                                                (He is) Lord of the East and the West : there is no god but He : Take Him therefore for ( thy ) Disposer of affairs. And have patience with what they say, and leave them with noble (dignity). And leave Me ( alone to deal with ) those in possession of the good things of life, who ( yet ) deny the Truth; and bear with them for a while. With Us are fetters ( to bind them ), and a Fire (to burn them), and a food that chokes, and a Penalty Grievous. .... We have sent to you, (O men!) an apostle, to be a witness concerning you, even as We sent an apostle to Pharaoh. But Pharaoh disobeyed the apostle; so We seized him with a heavy punishment. Then how shall ye, if ye deny (God), guard yourselves against a Day that will make children heavy headed? ..., Whereon the sky will be cleft asunder? His promise needs must be accomplished. Verily this is an admonition : therefore, whoso will, let him take a ( straight ) path to his Lord!

                                                                                • Isak Samuelsson
                                                                                  Isak Samuelsson  3 weeks back

                                                                                  We know we don't know what we don't know.

                                                                                  • Amy Gough
                                                                                    Amy Gough  3 weeks back

                                                                                    I love this

                                                                                    • purpletetrisdragon
                                                                                      purpletetrisdragon  3 weeks back

                                                                                      I completely understand what he is trying to convey.

                                                                                      • Robert Gaines
                                                                                        Robert Gaines  3 weeks back

                                                                                        Has he been invited back on the show since he changed his name to Neil deGrabAssee Tyson?