The Mystery That Keeps Neil deGrasse Tyson Up At Night

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  • 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 • 9 853

  • Tito
    Tito  3 hours back

    Team RC.. Roman Catholic

    • 18th Spectro
      18th Spectro  6 hours back

      Leave a like if you understood everything that he said, and be honest. I'm gonna leave a like myself, because I actually understood everything. Btw, my mind is completely blown indeed from what I've just learned. 💯😌

      • KingKracker
        KingKracker  1 days back

        Colbert is so dumb he didnt even know Neil was joking at tue begging lol

        • Muzi Nene
          Muzi Nene  1 days back

          Honestly I didnt get that team RC joke. Thanks to Neil

          • gary delong
            gary delong  2 days back

            Roman Catholicism is the hijacked train of the Romans. The train went in the tunnel as pure Christianity (teachings of Christ) and came out Roman Catholic (tainted).

            • Benjamin Christensen
              Benjamin Christensen  2 days back

              7:14 Sure he will be okay. He believes in a god, so no matter what science says, he'll just fall back on that..

              • Juan Gonzalez
                Juan Gonzalez  2 days back

                He makes cosmic expansion sound like it'll happen overnight...it'll take billions of years to notice.

                • Juan Gonzalez
                  Juan Gonzalez  2 days back

                  "We won." I fucking hate Stephen Colbert.

                  • Julio Rodriguez
                    Julio Rodriguez  4 days back

                    Neil is the goat honestly i never het bored of watching of watching him explain questions and share some his own with us

                    • king_has_no_cloths kul

                      that is some crappo!

                      • Jimmy Brice
                        Jimmy Brice  4 days back

                        one difference for the futurians is that there is the possibility of information being passed down to them, as we are now at a stage where our society gets captured by media sources, etc.
                        we did not have anything shared to us from a billion years ago, etc. when the universe was closer than it is today

                        • Emmanuel Buthelezi
                          Emmanuel Buthelezi  5 days back

                          Oh my Gosh!!!.... this is really did freak me out

                          • Harsh Singh
                            Harsh Singh  6 days back

                            5:43 thank me later

                            • Ignacia G.P.
                              Ignacia G.P.  6 days back

                              I'm glad he explained the R.C

                              • Nicholas M
                                Nicholas M  6 days back

                                “The universe is caster than anything in the universe”

                                Nah really man

                                • Javier Lopez
                                  Javier Lopez  7 days back

                                  Simple as this they can asume the universe as we know happen in the big bang lol yet they cant find drug dealers hiding in the forest/jungle in mexico or anywhere else lmao with all the technology available today

                                  • ishwor Poudel
                                    ishwor Poudel  1 weeks back

                                    Scientist knows nothing, we are not in the process of evolution its destruction

                                    • Eddie Damen
                                      Eddie Damen  1 weeks back

                                      Everyone celebrates new year at midnight cause then all bars get rich lol if the correct moment to celebrate it was at 9am at home no money would get spent

                                      • Jump Gang
                                        Jump Gang  1 weeks back

                                        He started sounding like Seth rogan towards the end 😂

                                        • Big Man
                                          Big Man  1 weeks back

                                          What we don't know is what was known before we knew that we didn't know.

                                          • coachcashmoney
                                            coachcashmoney  1 weeks back

                                            Get him on Jeopardy! Now!

                                            • Aroldo Filho
                                              Aroldo Filho  1 weeks back

                                              I just love this video 👏👏

                                              • Andreas Alfredsson
                                                Andreas Alfredsson  1 weeks back

                                                "A mysterious pressure in the vacuum of space" umn, how about "the aether"! Like it was originally theorized about in the 1800s openly before it was shut down by the "experts". Also dark matter doesn't exist. Yeah it's the aether.

                                                • José Roberto Zaracho Zárate

                                                  GODDAMN THAT’S A GREAT QUESTION AND NOW NEITHER WILL I BE ABLE TO SLEEP THINKING IN THAT

                                                  • Daniel Vazquez Martinez

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

                                                    • Mayukh Sen
                                                      Mayukh Sen  2 weeks 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  2 weeks 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
                                                        TIRTHANKAR ROY  2 weeks 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
                                                        TIRTHANKAR ROY  2 weeks 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  2 weeks back

                                                      "Demon eye" Stephan

                                                      • 1YangYing
                                                        1YangYing  2 weeks back

                                                        Could he BE any more pretentious

                                                        • Herbert Erdferkel
                                                          Herbert Erdferkel  6 days back

                                                          to dumb people everything said being smarter is considered pretentious these days, you haters need a new word ... calling someone pretentious doesnt work considered the inflation with which you throw that term around

                                                      • 724tomjohnston
                                                        724tomjohnston  2 weeks 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  2 weeks back

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

                                                            • Pastel Assassin
                                                              Pastel Assassin  2 weeks 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  2 weeks back

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

                                                                • Sailor376also
                                                                  Sailor376also  2 weeks 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.  2 weeks back

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

                                                                    • Gabriela Perez
                                                                      Gabriela Perez  2 weeks back

                                                                      i love his tie

                                                                      • Libertatem
                                                                        Libertatem  2 weeks back

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

                                                                        • B Dre
                                                                          B Dre  2 weeks back

                                                                          🙂 = 💥

                                                                          • aei -
                                                                            aei -  3 weeks back

                                                                            THAT WAS A BEAUTIFUL FUCKING STATEMENT NEIL. IM GOING TO LOSE SLEEP BUT ITS WORTH IT DUD

                                                                            • Diante Davis
                                                                              Diante Davis  3 weeks back

                                                                              We are that generation

                                                                              • Debbie Trudeau
                                                                                Debbie Trudeau  3 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  2 weeks 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  2 weeks 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  2 weeks 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  3 weeks back

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

                                                                                • Sub
                                                                                  Sub  3 weeks back

                                                                                  TOYOTATHON

                                                                                  • Xiphactinus
                                                                                    Xiphactinus  3 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  3 weeks back

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

                                                                                      sums up my math knowledge

                                                                                      • Vaimiim Ciim
                                                                                        Vaimiim Ciim  3 weeks back

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

                                                                                        • Acus9999
                                                                                          Acus9999  3 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  3 weeks back

                                                                                            To me, he's insufferable.