Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth with our astrophysicist host: Matthew O’Dowd.
Episodes released every Wednesday afternoon!
Matt O'Dowd spends his time studying the universe, especially really far-away things like quasars, super-massive black holes, and evolving galaxies. He uses telescopes in space to do it. Matt completed his Ph.D. at NASA's Space Telescope Science Institute, followed by work at the University of Melbourne and Columbia University. He's now a professor at the City University of New York's Lehman College and an Associate at the American Museum of Natural History's Hayden Planetarium.
Previous host Gabe Perez-Giz is an astrophysicist who studies black hole physics. He received his Ph.D. from Columbia University and also hosted PBS Infinite Series.

  • 100
  • 247

Жорумдар

  1. James T

    Thesis (expanding Universe) The James Theory! (The Answer Physics can’t explain) Eternity exist and has always existed from eternity past to eternity future, eg, If I blow up a balloon representing our known universe which had a beginning and is filled with material, stars, galaxies etc. it must blow or expand into something which is eternity space eventually our expansion will stop Within the eternity space as energy runs out. If the creator of the universe (God)(Omni Science, Omni Presence, Omni Potence) is eternal then our known universe is held together by the power and purpose of the Sovereign Creator who has eternally existed (and has never been created) but always has existed without a beginning and without an end in eternity space. Makes Perfect sense to me. This is my Simple explanation, my dear Atheist friends may have a harder time to come up with say a formulae, theory or example to make any further sense or non sense of it. Even the theory of multi verses are within the Balloon Concept. And further more this would make our known expanding universe appear as a shrinking speck of dust as in the view and scope of the beyond eternity space expanse. Totally occupied by its creator everything largest to smallest and beyond to what ever has ever existed past and future is known and will be known by and still exist in the Living Creator of all things. Definitions Omnipresence Means minimally that there is no place to which God's knowledge and power do not extend. It is related to the concept of ubiquity, the ability to be everywhere or in many places at once. This includes unlimited temporal presence. Omniscience (/ɒmˈnɪʃəns/) is the capacity to know everything. In monotheistic religions, such as Sikhism and the Abrahamic religions, this is an attribute of God. ... The word omniscience derives from the Latin word sciens ("to know" or "conscious") and the prefix omni ("all" or "every"), but also means "all-seeing". Gods Omnipotence (examples) Revelation 19:6 Then I heard what seemed to be the voice of a great multitude, like the roar of many waters and like the sound of mighty peals of thunder, crying out, “Hallelujah! For the Lord our God the Almighty reigns. Hebrews 1:3 He is the radiance of the glory of God and the exact imprint of his nature, and he upholds the universe by the word of his power. After making purification for sins, he sat down at the right hand of the Majesty on high, Matthew 19:26 But Jesus looked at them and said, “With man this is impossible, but with God all things are possible.” Luke 1:37 For nothing will be impossible with God.”

  2. Ethernos Grace

    we can test it ask me personally.it can be done with current LHC.

  3. Ethernos Grace

    as max put it how we see universe is different so there is going to be different theories about universe...but we can achieve singularity with math and that my friend, is beautiful.so in a same way may our beliefs come together as one.like how quran may have one allah but since allah is omnipotent. why is it not possible that god can come in different forms? so, why do we fight over religion and kill over it?

  4. Ethernos Grace

    there really is multiverse....

  5. Stefano Portoghesi

    Is "time" just an illusion ? A sequence of changes , a sequence of events , seems more likely to be fundamental rather than "time" itself .

  6. Michael Kehm

    I think the past and future don't exist, because time does actually not exist. Let me explain: I think time is not something physical. It's just a description for a distances on the time arrow. Just like measuring the distance between two points. Just two points in time. The distance of two points in space is only positive. The smallest distance is 0. The farthest distance is the width of the universe. But there is no negative distance in absolute value. And that is why you can't go back in time and everything happens in one time direction and only at one point in time. If you measure the distance between two points in space, there is no before the first point. Only the distance from point A to point B. And the same is with time: There is no time before now. Only the distance between now and then. Sure, if some star explodes far away, we see the light later because of the speed of light. But the light we see and the light itself always exist at the same slice of the block universe. If not, the sky or space would be really bright because we should be able to see all the light of the past, present and future. Or not? Even if you fly around the earth and your clock goes slower than on earth, you are still exist "now" and not "later" or "earlier". If someone would really fly in the future, he would be gone from "now". Or if someone stays in the past, he would be gone from "now" as well.

  7. Indo Railfans

    For to terraforming mars we must be bring ceres to mars hit mars with ceres because ceres much of water

  8. Stefano Portoghesi

    There must be a "cut off" point at an atomic or molecular level , where the probabilistic nature of the quantum and the deterministic nature of the macro world begin to separate from one another .

  9. Ethernos Grace

    i feel like seeing young physicist gathered.

  10. Shinobi 28

    Perpetual motion machines are actually possible but you need another dimension to do them.

  11. Kaushik Chakraborty

    Doesn't he looks like Mr.Bean with long hair

  12. Kathy Wido-Mason

    They both exist. Time is a man made concept. There is no time. Everything is happening at once. We are about to evolve to the 5th dimension where this will be totally understood.

  13. the beauty of me is that i`m very rich

    Too much nonsense packed together

  14. wulphstein

    If theorists stick to their guns on the multiverse, they will fool a lot of people. But there just isn't any evidence for a multiverse.

  15. Yuuup

    Something that stable really is strange. Just ask my ex...

  16. Machinshin

    just studying up some math to be able to go to university. All this +/- dimensions etc, makes me think of derivative amd primitive functions. =)

  17. Ben Walker

    This logic is silly. After a year, a genius baby takes a breath, then realises it's much more likely that breath is somewhere in the middle of its life rather than the beginning. This is not how the universe works, the middle is no more probable then the beginning, or the end. Whoever made up this theory doesn't understand statistics.

  18. rivum rejex

    Maybe all this overcomplicated things I mean some of the biggest scientific discoveries was quite simple ie newton's apple and Einstein dreams maybe there's a much simpler explanation to the fabric of space...

  19. Sam Hudson

    Now that’s a quirky star

  20. Riki Mitchell

    Matt re 2:06 the spacetime metric in which swartchild solved the equations does represent the spacetime we live in what relevance does his solution actually have IE though his math may have been correct it was premised on some fault axioms?

  21. A Kring

    Whoa! The best explanation on the holographic principle I have seen.

  22. ChrOnicKPoP

    JWST scheduled to launch in 2018... similar to CyberPunk

  23. Mark Smee

    What?

  24. Hved Dørek

    I still don't understand why he says that gravity is not a force, and that things in orbit are actually moving in a straight line around a bent space-time curvature, so as to appear changing in velocity and hence appear to be accelerating while in constant speed. By that same logic, earth is just moving in a straight line around the sun's bent space-time curvature... O_O If you understand it, please explain

  25. Cranjis McBasketball

    I married a gurl named chaniqua... all holes are black!

  26. ilko derez

    Another great episode! Keep making them, I'll keep liking them!

  27. ilko derez

    This is a great episode! This is the stuff that keeps us coming back. I've been interpreting the multi-worlds theory all wrong and it's not my fav... Thanks PBS SpaceTime! Bravo!

  28. Light Born

    kgup.info/get/m2-FY2yaiG2tpXs/video. Take it from me, I am Light Born.

  29. Hans Mork Topphol

    My idea has always been to import gasses from Venus, since it’s atmosphere is so thick and full of greenhouse gasses. Transporting large amounts of gas from Venus to Mars would be a problem though... but hey, if it’s the far future we’re talking about we might have efficient enough starships with a large enough carrying capacity for it to be an idea

  30. kapsi

    Is it possible that there's nothing beyond the event horizon, and every particle entering stops there?

  31. Geostomp

    At this point, it would be easier to just strip mine Mars for a space station that could actually support life.

  32. Samarth Goyal

    @Matt Can you explain the possibility of the speed of light being different in different directions, and how it affects our perception of the universe? I just saw the Veritasium video and got confused.

  33. Ziya Onat

    Da=Dark energy Deb=Dark energy before big bang Dea=Dark energy after big bang Ee= Entropy energy Ve=Vacuum energy Veb=vacuum energy before big bang Vea=vacuum energy after big bang Dm=Dark mater M=Visible mater De=Dea+Dab=Ee Ve=Veb+Vea Ve=Veb+Vea Ve+De=0 Dea=Vea+(Dm+M)C2 Veb=Vea+(M+Dm)C2+Dea Dea+Dea+Vea+(M+Dm)C2=0 Ee+Vea+(m+Dm)C2=0

  34. Greg Lialios

    "The nobel prize went to black holes, generally speaking" Wouldn't that be specially speaking?

  35. pi man

    The biggest Question in the universe: does PBS stand for Peanut Butter Sandwich??

  36. COMMUNICATION IS EVERYTHING

    If anyone is ready for Special and General Relativity taken to the next level read Oldand Dilis's Spring Time Theory, the guy has converted Special Relativity into multiple dimensions of time NOT ONE, solving quantum gravity and putting quantum mechanics into a classical framework, it's unbelievable but it's SOLID logic, it's simplicity at its best, using a simple inequality he beats the measurement problem and cracks the double slit experiment to rewrite physics. he explains EXACTLY what spacetime, matter, gravity and everything else is with no waffle, it's all in his INSANE theory of Everything, insane because it is mind blowing, the guy has little more than basic high school maths and science and he has solved everything from quantum gravity to quantum entanglement, the vacuum catastrophe to surface tension, he is way ahead of his time and explains most of it using plain English without the need for complex maths, he proves that the big bang/ standard particle models are WRONG....proves it CONCLUSIVELY!!! and big bang standard particle theorists are being dumbfounded or else they just aren't reading it, this is the one everyone has been waiting for, done by a novice, it's NUTS, It is available open source on doubleslitsolution.weebly.com/springtimetheory.html

  37. COMMUNICATION IS EVERYTHING

    If anyone is ready for Special and General Relativity taken to the next level read Oldand Dilis's Spring Time Theory, the guy has converted Special Relativity into multiple dimensions of time NOT ONE, solving quantum gravity and putting quantum mechanics into a classical framework, it's unbelievable but it's SOLID logic, it's simplicity at its best, using a simple inequality he beats the measurement problem and cracks the double slit experiment to rewrite physics. he explains EXACTLY what spacetime, matter, gravity and everything else is with no waffle, it's all in his INSANE theory of Everything, insane because it is mind blowing, the guy has little more than basic high school maths and science and he has solved everything from quantum gravity to quantum entanglement, the vacuum catastrophe to surface tension, he is way ahead of his time and explains most of it using plain English without the need for complex maths, he proves that the big bang/ standard particle models are WRONG....proves it CONCLUSIVELY!!! and big bang standard particle theorists are being dumbfounded or else they just aren't reading it, this is the one everyone has been waiting for, done by a novice, it's NUTS, It is available open source on doubleslitsolution.weebly.com/springtimetheory.html

  38. Josh Murphy

    So god can be c = ♾

  39. Pokemon Fan 300

    If the Big Bang Happened then it can happen again after the Dark Era

  40. CrewRanger Gaming

    Ok, so this is why speed of light can be different in different directions

  41. John German

    Well done!! It pulled a lot of things together for me and resolved some doubts I have always had about the converntional interpretation of QM properties. - Retired physicist.

  42. Shariff Ahmed

    Why dont we start investing all of our resources into making a mini death star? Just blow up any asteroid that even gets the idea of getting close to earth

  43. Bruce Reed

    Does entanglement conserve energy?

  44. ahmet mutlu

    well effectively newtons space time is still walid. for spesific object visual reality may change. but for exact some object time is some. ie as time is iteration counter of matters chemisty or mechanics :P

  45. Roman Romero

    nice video Matt! Please can you take a look at this interesting revelation and make a video about it? here the source: kgup.info/get/pZmNYmqrpaKEjn8/video

  46. wulphstein

    If the pilot wave interpretation is correct, then the Michelson-Morley experiment got it wrong, there is a lumiferous aether; it just moves at the speed of light!

  47. Michael Mishra

    7:05 damn i took it personal 😂

  48. Sunny Solutions

    What about brown holes??

  49. Dmitrii Sapelkin

    Why would you consider the wave function the only possibly non-deterministic aspect of reality?

  50. Dan X2

    Featured on Astral Education facebook.com/astralslate

  51. Terros

    There is only a single observer. We are all individual expressions of that universal consciousness. Problem solved..

  52. Nothing BurgerKing

    Muh brain done blew up

  53. -][][-

    How can Gravity dominate over the EM force, which is kinda ummm.... a stupidly more ‘powerful’ force? And considering everything has a net charge, or contains internal charges which are in a state of electro static equilibrium, then everything is subject to a force which is monumentally more influential than ‘gravity’ And the bs about the EM force not being able to possess ‘current’ at the subatomic scale is just that, bs.

  54. cubax599

    Hold on, idiot here. IF the ground accelerated upwards in the UK, wouldn`t the Ozzies fall off?

  55. Whatsapp Status King

    its a two different action don't compare both is same.

  56. Gari Worzalla

    That is why it is a theory!

  57. Christopher

    If every black hole has a singularity in it, are these singularities all the same 'size'? Do bigger black holes make bigger singularities?

  58. Coleby Cline

    So if you kept doing double slit tests indefinitely would the sequence in which it passes through the wave never overlap where it has determined it's final position previously? Will the particles keep finding new places or will particles eventually start landing in the same places? What happens of you stop one test and start another in quick succession? Do the particles follow a sequence/pattern or do they always end up being random? My head hurts.

  59. Kirsten Williams

    Could quantum entanglement have something to do with the even heat distribution?

  60. Don Brunton

    So dark matter is a transitional particle being replenished by the galactic structures they support? Cool.

  61. Rahul Bhattacharya

    Professor Brian Greene left the chat 🤣

  62. Quantum Tech

    I am unable to understand 😭

  63. Jordan Trudeau-Adams

    looks like guy has bad case of pigeon toe

  64. Dieter Lenaerts

    Shouldn't the lightcones be rotated 90° below the event horizon? Because the axis of time is also rotated 90° relative to regular spacetime.

  65. James Brunton

    Has anyone thought of centrifugal force between the earth and the moon? Like the hammer throw in athletics. Not so much the centrifugal force of the earth spinning.. The moon would have a little centrifugal force on the earth wouldn't it?

  66. controllerbrain

    A better question. What can they tell us about ourselves?

  67. Niam Sun

    LSD hits at 8:56

  68. Wilson M.D

    Simulation makes sense, but what created the simulator? Infinity seems likely. As it allows all the possibilities.

  69. Wilson M.D

    Why do we exist? Appears to be the underlying question. Even in one universe it could be a freak accident.

  70. sakshi kumari

    5:37

  71. Magnus Helliesen

    3:48 What does it mean for a dimension to be visible? :)

  72. Wilson M.D

    I'm happy that Matt carried on this show and made it his own. But this is a quality episode as well.

  73. Apurb Mishra

    We can go to the future of aliens

  74. mike zappulla

    Great job explaining the same thing in 5 different ways.

  75. Jocelyn Joseph

    Gravity in 2-D and charge in 3-D have little in common, although fields have properties in common.

  76. Ali Mohamed

    ليش ماكو ترجمة عربيه

  77. Cryptonitor

    Thats funny ways of looking at it. Time doesnt really exist. It is circular indeed.. Events will happen because they already have. Information does not have the constraints humans perceive as time. Instatransfer so we can make a universal comsys =) Its nice for information, but doestn really help humans much at present level. You gotta evolve a step or three before the actual benefits of the speed of information can be understood and benefit from that understanding. You can try it alittle now if you want... Ghosts in the shell, bobbys in the well, a thousand hearts that fell.... None occured faster than the feeling that was felt. Accusations of the fart that was smelt. Consider: "Info x 1/c +e*c^2" and see your universe melt into where you can reach it

  78. Rahul Ravanan

    #அருட்பெருஞ்ஜோதி 🔥

  79. Dastan

    Did I understand this?? It depends. May be yes, may be no. In Hinduism and Jainism (original) this "Uncertainty" of Existence of God (Yes you Heard Right, 7 points) is Called "Shyadwada" or "Anekantawada" (Many sidedness).