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Wonders of the Universe

2011 ,    » 78 Comments
Ratings: 8.58/10 from 19 users.

Wonders of the UniverseProfessor Brian Cox reveals how the most fundamental scientific principles and laws explain not only the story of the universe, but the story of us all.

Destiny. Having explored the wonders of the solar system, Professor Brian Cox steps boldly on to an even bigger stage - the universe. Who are we? Where do we come from? For thousands of years humanity has turned to religion and myth for answers to these enduring questions. But in this series, Brian presents a different set of answers - answers provided by science.

Stardust. In the second stop in his exploration of the wonders of the universe, Professor Brian Cox goes in search of humanity's very essence to answer the biggest questions of all: what are we? And where do we come from? This film is the story of matter - the stuff of which we are all made.

Falling. In the third episode, Professor Brian Cox takes on the story of the force that sculpts the entire universe - gravity. Gravity seems so familiar, and yet it is one of the strangest and most surprising forces in the universe. Starting with a zero gravity flight, Brian experiences the feeling of total weightlessness, and considers how much of an effect gravity has had on the world around us.

Messengers. In the last episode of Professor Brian Cox's epic journey across the universe, he travels from the fossils of the Burgess Shale to the sands of the oldest desert in the world to show how light holds the key to our understanding of the whole universe, including our own deepest origins.

78 Comments / User Reviews

    Sieben Stern
  1. Sieben Stern

    He talks about such mind blowing, terrifying things... in such a lovely voice. I'm simultaneously scared and soothed.

  2. 0zyxcba1
  3. 0zyxcba1

    I saw Eternity the other night,
    Like a great ring of pure and endless light,
    All calm, as it was bright;
    And round beneath it, Time in hours, days, years,
    Driv'n by the spheres
    Like a vast shadow mov'd; in which the world
    And all her train were hurl'd.

    ~ fragment from THE WORLD
    by Welsh metaphysical poet,
    Henry Vaughan (1622-1695)

  4. Guest
  5. Guest

    Just finished watching part 1, beautiful cinematography, nice easter present, beats chocolat!
    Cute smart cookie too!

    We needed to be able to see to come up with understanding our universe, and from what we saw we shaped our reality. Is this it? What if we didn't have eyes?
    Could it be that we got it all or will the yet unexisting civilization come up with a different comprehension?

    On to the next....

  6. Gary V
  7. Gary V

    Wow! Isn't Science amazing. We are all living in a time of amazing Scientific discovery & we are progressing faster & further than at any other time in Humanity. Just think how much further & faster we could progress if all the hundreds of millions of £'s that we waste on religion to perpetuate outdated ancient myths was used to advance our Scientific knowledge for the benefit of all of Humanity.

  8. Bogdan
  9. Bogdan

    thx vlatko! u the man

  10. Al
  11. Al

    Second that

  12. Al
  13. Al

    Brian Cox is always a decent presenter =)

  14. Top_Quark
  15. Top_Quark

    BBC documentaries are the best! this is another good one. Loved Ep2 'Stardust'. Indeed, we are all made of stars as Carl Sagan used to say.

  16. Guest
  17. Guest

    Great doc saw it before, don't mind watching again.

  18. Guest
  19. Guest

    True, wonder what the religee's have to say about us only being here as long as approx. 0.1-100 googleplex-googleplex-googleplex to the life span of the universe!! Did not have much time for any of their gods to make anything.

  20. Jack1952
  21. Jack1952

    Thank God I was created smart enough to know that God didn't create me.

  22. TheSatyaYuga
  23. TheSatyaYuga

    I preferred Wonders of the Solar System but this was still extremely enjoyable, especially in HD. The series does well to explain the major theories in an accessible manner.

  24. Lary9
  25. Lary9

    replying to Azilda~

    There aren't any disc brakes on Evolution's processes. So whether H. sapiens will find some new speciating adaptation depends upon the environmental pressures of natural selection and perhaps "unnatural" natural selection too. We may wind up adapting in the future (over many, many generations) to the profound geophysical changes that we have self-generated as a species. Ironically, it has only taken a few centuries of fossil fuel dependency and its corresponding population hyper-growth to create these pressures.

  26. Gary V
  27. Gary V

    Nice 1 prof Cox, I can't wait until next year for "Wonders of life" to be on TV. Superb.

  28. Fareth Didwell
  29. Fareth Didwell

    I like this guy.. He has passion about the discipline he knows and hes studied all of his life! Hope he one day becomes a new Carl Sagan like figure.

  30. Al
  31. Al

    Actually, he used to be a keyboard player in the early 90s hehe =)

  32. Michael Lamph
  33. Michael Lamph

    I wondered the same, doc. Perhaps the Second Law of Thermodynamics doesn't apply to living organisms?

  34. James
  35. James

    every living thing dies, i do believe he explained this. Came into being alone? did you miss an episode? Try watching the stardust ep again. It is explained very simply in that episode. If science does not believe something exist, it is because there is no plausible theoretical hypothesis nor an experimental data. With that said we can now subtract the word believe and say know!

  36. Ramus73
  37. Ramus73

    For some reason I can't put my finger on I don't like him. Maybe I'm getting long in the tooth and expect my physicists to be white haired, bespecktackled and socially inept.

  38. Robert Fairhurst
  39. Robert Fairhurst

    If you are an M.D I am sure you have heard of the Sun. Entropy increases in a closed system without an external agent. The Sun is the external agent. Don't try to use science to doubt evolution if you don't understand science. I would be ashamed to call you my Doctor.

  40. John Christopher McDonald
  41. John Christopher McDonald

    Thanks for sharing this! Excellent Documentary

  42. Nikos Chantziaras
  43. Nikos Chantziaras

    It applies everywhere. The earth is not a closed system. The combined entropy of the earth, the sun and the surrounding space increases over time. It's very logical. All one needs to do is simply think about it a bit; how the energy that comes from the sun drives things on earth, but the sun is gaining entropy in the worst possible way: radiation of energy. Radiation is the end of the road. There's as much entropy in it as you get get.

  44. NicodemoA
  45. NicodemoA

    Hi Robert

    Thank you for responding to my comment although I am not sure I made my self clear about evolution. I was not doubting it I was actually invoking it as something that goes against the concept of entropy itself and therefore seems to be an exception to it and possibly also invalidates the 2nd law of thermodynamics. According to that "law" we technically should not exist.
    So my question is should we perhaps be revisiting this so called law and trying to iron out this little descrepancy. After all isn't that what scientists do?
    It's what made Einstein so (at first unpopular) and later a genius.

    Additionally cosmologists at the Perimeter Institute in Waterloo Canada and around the world are now beginning to question the big bang theory itself on which the 2 nd Law seems to be perched. You may wish to check out their youtube site.

    I trust this addresses your concerns.

    Best wishes,


  46. NicodemoA
  47. NicodemoA

    Thanks Michael,

    That of course might imply that it is "not" a law (or law that can be broken) at all. Many scientitists are now talking about the presence of wormholes in the universal fabric that potentially can allow time travel as well. These are a few interesting phenomena/concepts that may be challenging our current view of how the universe works.

    So we may need, as often happens when we think we understand it all, to go back to the drawing board.

    Best Wishes,

  48. leonardobdas
  49. leonardobdas

    He was able to catch my attention a bit better when he was not trying to pose like a master teacher... which he is not for the virtue of his youth. I rather prefer his shows that he is a bit more human and talks with you instead of telling you some truth with a funny voice.

    My brain goes straight to david attenborough and other older figures and goes... this is a knock off! then I remember that not too long ago he was on a glam rock band...

    Perhaps it is because all his shows have a similar formula and it is getting boring to me. perhaps it is the high cheek bones that makes him look like he is smiling all the time... haha

  50. Fecioru Florin
  51. Fecioru Florin

    If you're looking for religion, try science.

  52. Jack1952
  53. Jack1952

    Living entities ingest energy to perpetuate itself. Take away that energy and the living being dies. The 2nd law still functions under this system. You have to expand your range of vision.

  54. NicodemoA
  55. NicodemoA

    Hi Epicurus

    Thank you for your response!

    Just want to make something clear, first off I am not a creationist. My comments arise from a direct experience of work I do with individuals that strongly suggests the presence of what I referred to as Life Force Energy. I realize that science doesn't acknowledge this and in my view attempting to simply write it off with physical laws doesn't feel satisfying to me.

    With respect to your second paragraph is it your assessment then that living human beings have no intelligent program behind them (and I am not referring to god here rather an organizing energy/consciousness/awareness that allows us to have this kind of discussion) and that we are simply thermodynamic machines?

    Thanks in advance,


  56. dallasAlice
  57. dallasAlice

    brian cox is a hot motherf*cker. what a dreamboat. nerds rule.

  58. Jeremy Heil
  59. Jeremy Heil

    epic doc!

  60. Jack1952
  61. Jack1952

    Hi Nick

    It is possible for that sand castle for reform itself but highly unlikely. I agree. But life does not work that way.
    The chemicals in the early primordial soup would bond together in an infinite number of ways. In one such simple mixture, energy was added or used so that mixture replicated itself. This process happened again then again. What we have now is the first and earliest and most primitive form of life. It is as if that sand castle not only reformed but was able to draw from an energy source to expand and create more sand castles from itself. This life, over many years became more complex and eventually became recognizable as primitive life as we know it. As long as there is an energy source (food) it can reproduce. The life is not the closed system. It is part of a larger system. The food is part of the reaction that allows a living thing to grow and is added to what was once a closed system and allows it to become an open system. This doc quite clearly shows that when the ultimate source of the energy ( the sun ) that keeps us alive and growing, runs out of fuel and goes out, the entire system will finally start to break down. This means that all that is inside that system will also break down and life will be extinguished.
    That is what I meant when I said that you have to expand your range of vision. Life is only a part of a much larger process. We may feel like individuals but in reality we're not. You and I are but 2 grains of sand in that sand castle and not the sand castle itself.
    I don't know if I make any sense but I hope you can at least get the gist of what I'm trying to say. It is not an easy concept to understand let alone explain.

    Thanks for listening.

  62. Rahmatullah Vellore
  63. Rahmatullah Vellore

    Brian Cox should read the Koran at least once to know what it says about what science and this documentary is so concerned about. I am not trying to sell Islam but just wish that with the level of his knowledge about this cosmos he could gain an insight into this universe and its laws. The Koran is a book for the people of knowledge like Brian Cox, not for the ignorant.

  64. Epicurus
  65. Epicurus

    the Koran is a terrible place to find scientific information. it is wrong so many times.

  66. Taras Moskvichov
  67. Taras Moskvichov

    I like him alot, but lets be honest, only a brit can walk through the desert with a jacket and sweater underneath it.

  68. Epicurus
  69. Epicurus

    Hi NicodemoA,

    The forces of nature allow for chemistry to take place, that chemistry eventually led to a single celled organism which would evolve to be like us without any consciousness or awareness directing that process. it was just more beneficial for the being to be more self aware so it could survive easier and could appeal to the central nervous system it developed (also as a means of better survival)

    i do believe that it is very likely that our species will go extinct sometime in the future and that just means that we, like ALL parts of the universe, are a by product of the laws of nature and the big bang. I dont feel we are any intentional goal.

    the universe existed for billions of years without us and it will exist billions of years after we die out.

  70. Guest
  71. Guest

    Then you are talking about consciousness at the cellular level right?

    Don't know what you mean "it would be more beneficial for the being to be more self aware so it could survive easier"

    That sounds like what came first, the chicken or the egg?
    Where did the consciousness come from in the first place in the single celled organism, to instill in the being it should become more self aware, so it could survive easier? if it had no consciousness or awareness in the single celled organism in the first place? That does not explain consciousness. As the forces of nature do not explain consciousness.

  72. Sieben Stern
  73. Sieben Stern

    I hope he never does. I hope he keeps his lovely eyes on the skies and the wonders of nature instead of dusty old books written by dusty old men, thousands of years ago to control others.

    the koran and the bible and the torah have nothing useful in them, let alone about nature or science. they are books that should return to the dust they came from, not pollute the minds of intelligent, beautiful people like Brian cox.

    there is so much more to this universe that has been written in your holy book.

  74. Guest
  75. Guest

    Thank you for the link, but what you have given me is a "hypothesis" as stated on the link, albeit it is a scientific hypothesis.

    A scientific hypothesis in not the same as a scientific theory, means the scientific method requires that one can test the hypothesis. So that link you gave offers no empirical evidence.

  76. Guest
  77. Guest


    Read with interest the work they are doing on your PDF download link that you have supplied. Thank you.

    So, quantum physics and probabilities are involved in their hypothesis, maybe leading to a theory? as in ""The evolution of of neurally efficient cerebral cortex had an unintended consequence a unique property-that of interacting by quantum physics with the mind called anticipatory evolution""

    Perhaps I misunderstood, thought you were stating a fact, not hypothesis when I first replied to you, if so, my bad.

  78. hh0
  79. hh0

    This guy is the new and I must say better than Carl S. it is more than a doc its art.

  80. donnycutter19
  81. donnycutter19

    the final thought on episode 1 made me soul understood how amazing this experience was

  82. Guest
  83. Guest

    They say in episode one that entropy is a constant and has always been. In other words we have been moving from order to chaos every since the universe came to be. But this couldn't have always been the case. It would seem to me that in the beginning it had to move from a less organized state to a more organized state, gas assembling into stars, dust and debris forming planets and whole solar systems, etc. I understand that once these stars and planets are created they immediately begin to decay back into their constituent parts, just as we begin to age and decay the second we are born. But for those stars and planets to form their constituent parts had to self assemble according to the laws of physics, is this not reverse entropy? Is this not the equivalent of the desert wind building a sand castle?
    Now he did state that that very thing was possible, that no law in physics says the wind could not build a sand castle, only that it is very very unlikely. So does that statement not say that entropy does not always move in only one direction, that it is only much more likely that it will? If this is the case then entropy is not a constant, only the most likely outcome. In fact we can point to specific examples of entropy moving from a higher to a lower state, a solar system forming around a star would be a good example. Then again that same solar system will eventually decay back into that from whence it came, and this is entropy moving from a lower to a higher state. I suppose it strikes a balance in the end, each time it moves from a higher to a lower state it will eventually do just the opposite and undo what has been. Maybe that is the real constant, balance- For every action an equal and opposite reaction.
    Anyway, Just a thought. This is a great series; I highly recommend it for anyone interested in cosmology or physics.

  84. kirastianity
  85. kirastianity

    That was wonderful. Our universe is certainly magnificient. But I like to focus my attention on Earth, which is the planet where I live now and where I will die someday, according to the universe.

  86. Guest
  87. Guest

    Thats the whole point of studying the universe, to better understand the planet we live on and the processes that created and continue to sustain both it and us.

  88. Guest
  89. Guest

    Apparently my confusion about entropy moving in one direction stems from the definition of entropy Cox gave in part one of this doc. He said that entropy was a measure of how many ways you could rearrange the parts of a whole and not change the whole, this is not exactly true. Entropy is the measure of usable energy in a closed system. The more usable energy you have the lower the state of entropy. Of course as time progresses everything cools and motion begins to slow and entropy increases as energy decreases. That makes perfect intuitive sense, he should have said that. Not that what he said was not true, just that it was somewhat misleading.

  90. manohar sullad
  91. manohar sullad

    OK now i can't stop commenting about religion, there is simply so so much invoking of religion in science.
    How about Hinduism. well it is the only one religion that says Universe goes into an infinite cycle of Creation(Big Bang) and Destruction(Big Crunch). See Hindu Cosmology for more info. Even though the Big Crunch is not a much supported theory , but before Hubble's discovery and Dark Energy causing acceleration expansion it still was the best theory available.
    Something to think about the oldest religion on Earth.

  92. Top_Quark
  93. Top_Quark

    Science is based on facts validated by experiment and religion is based on ancient mythologies. The Koran & Rig Veda are not books of science, they may contain passages that might suggest a cycle of creation and destruction but it's all symbolic. If you go into their details then there are many more contradictions with science & cosmology than things in common with science.

  94. JustMe___1
  95. JustMe___1

    Well, I wouldn't say "better", but he can pretty much be the new Sagan, at ep.2 I was thinking exactly about that. At first I said "He might be copying Sagan a bit", but 2nd thought was "So what even if he does? It's amazing and should be encouraged!"
    It's art, indeed.

  96. April Hillyer
  97. April Hillyer

    I love this guys voice its very soothing. It's great to watch right before bed.

  98. Beerwulf
  99. Beerwulf

    Don't even.. Carl Sagan is a legend and made people interested in science and space just by his demeanor and his charm.

    This guy put me to sleep, I don't care what he wants in his garden!!

    oops: wrong person to quote.. meant the hhO under me :D

  100. Epicurean_Logic
  101. Epicurean_Logic


    Entropy increases on a global scale; that is the universe will always get 'messier' overall.

    On a local scale ordering can take place like the examples that you stated of our solar system, but overall things will always get more disorganised.

    The theory goes that for a system like our solar system to self organise it must not be closed; that is energy is entering from without.

    The matter that congeales and ignites to become our sun comes from without of the system. i.e. it is not closed at the point in time before the star ignites and matter pours in from the 'outside' universe.

  102. Epicurus
  103. Epicurus

    @manohar sullad

    actually science doesnt say the universe will collapse in a big crunch that is a very outdated view of cosmology. the recent data shows that it will keep on expanding until everything is so far apart it cant produce any more heat energy and will die in what is now deemed "the big freeze"

    but you are right, there is lots of wisdom found in hinduism, buddhism, and jainism.....A LOT more than in the judeo-christian religions.

  104. hh0
  105. hh0

    yeah not better but a damn good sub I miss carl.

  106. capriciouz
  107. capriciouz

    Epi you of all people may be able to answer a question that has plagued me:

    How can we say for certain that our universe is a closed system when we cannot even observe all of it? Is it misguided to stay on the fence about this? I understand by definition that the universe should be a closed system, but I think it is obvious that just because our definition says so doesn't mean it is that way.

    What are your thoughts on this, if you would be so kind? Thanks in advance.

  108. Epicurean_Logic
  109. Epicurean_Logic

    Yikes capriciouz, that's a tough one! I just knew that someone was going to ask a difficult physics question…

    Let me first say that there are many questions in physics that plague me and answering one question inevitably opens the door to an array of further equally baffling questions and that’s the nature of science.

    But as the saying goes, 'the proof is in the pudding' , it works and real practical benefits come from it, so we accept it. The pieces of the puzzle fit together and useful predictions are made that align with physical reality, so we use it... With that in mind we can tentatively proceed.

    "How can we say for certain that our universe is a closed system when we cannot even observe all of it?"

    The truth of the matter is that we cant say for certain. Answering the 'how do we know that…?' type questions in physics always boil down to two answers, 1. because measurable evidence backs up the assertion and, 2. because the assertion fits neatly into the bigger picture of what is already known. That’s it in a nutshell.

    Now, lets assume that the universe is closed, a useful simplifying modelling assumption. Then if the model's results don't fit the observable it can be tweaked by allowing matter/energy to flow in and then checked against the observable. This process continues until the model accurately predicts what is seen. I guess that this approach has already been used as it is quite common practice to start off with a simple model and then add more complicated features as and when they are needed. This suggests that a closed universe matches the observable more accurately than an open universe.

    "Is it misguided to stay on the fence about this?"

    I don’t think so. The whole point of the game is to convince oneself of the validity of any given idea, only then can one slot the piece of knowledge into the cosmic jigsaw with confidence. Any niggling doubt suggests that either some piece of information is missing; that there is some serious flaw in what is being presented or that the answer is just too far ahead of what is currently knowable.

    It is quite normal to have huge difficulty in accepting physical theories and this is good in the sense that it generates deep thought that can enrich a concept . On the other hand more interesting results can be generated by accepting many previously demonstrated results and creatively combining multiple ideas. A little bit of this and a little bit of that...

    So basically, there is no basically, just facts that match the observable to a higher and lower degree of accuracy.

  110. Michael Haze
  111. Michael Haze

    Time isn't anything like we know. Time is not the moment of something.
    In my opinion time is the bridge from one 'frame of the universe
    to the next one(sorry for my not-perfect english), almost like a symbol in an maths equation.
    image these blocks
    I____II____III___IV____V___ ....
    1 +1 =2 +1 =3 +1 =4 +1 =5 +1 =

    then I, II, III, IV,V are the fragment of the present (which you could see as the =) and time is the +1 which makes everything happen:
    an object to move
    the 'seconds' arrow to tik
    the planets to travel

    if you stop time (take out the +1) then everything would stop waiting for the +1 to happen
    if you go back in time (make it a -1) you are traveling back in the calculation history


    V____IV____ ...
    =5 -1 =4 -1 =

    so time travel, to the future at least, is not about tricking the clock but about tricking the equation for it to do +1 around you much more often, while for you it continues at the same pace

    tryed to put it down as good as i can - what do you think about it

  112. Epicurean_Logic
  113. Epicurean_Logic

    It is good that you are using symbols to capture and express your thoughts.
    Good understanding of the nature of time.
    You should tighten up your use of symbols e.g. 1+1 (does not equal) 2+1 (does not equal) ...
    It is better to use 1 (goes to = single arrow with plus one above it) 2 (goes to) 3 ...

  114. capriciouz
  115. capriciouz

    Thank you for the very thorough reply, Epi. It was very enlightening.

  116. Artur Necipuruk
  117. Artur Necipuruk

    Its a bit confusing when he explains int he first movie that the stars will go off, and the universe will go dark and empty, and in the second one he speaks of an endless life cycle of stars -_-"

  118. neonlys
  119. neonlys

    the great thing about this documentary, and what I think sets it apart from other documentaries on the universe, is the way in which Brian Cox allows himself to simply marvel at the sheer spectacle and beauty of his different topics, without any academic arrogance. He showes an outstanding ability in this sense to level with the viewer and share his fascination, without ever becoming unprofessional or trivial. Informative, well composed and fascinating, a great documentary!

  120. Michael Rainey
  121. Michael Rainey

    Ok I have some question's to anyone that might be able to answer...

    In part 1 Brian Cox said all the stars will eventually die and nothing will survive when all the black holes fade away. But then in Part 2 he explains that when a star dies it creates nebula that then creates more stars... and he even says that it is an endless cycle of death and which is it?

    And if all the stars do die out, whats to stop humans in the far distant future from developing "spaceships" that are 100% self sufficient e.g renewable energy sources, labs to create elements etc? The atoms from all those dead stars wont just despair.

  122. befitshop
  123. befitshop

    I have seen all the cosmos docs, hawkings, morgan free man, docs from the 70 's. But this one is one of my favourites. It reminds me a little like the Carl Sagans docs.... Very understandable for everyone, even my daughter of 11 is hooked to it ! thanks Brian.....

  124. Rohit Bhushan
  125. Rohit Bhushan

    By of the best documentaries i have ever seen. Absolutely Wonderful. And what a great score. Very inspiring...

  126. Sarah Macdonald
  127. Sarah Macdonald

    freaking brilliant - i am a student of the great work - based in yelm - wa state USA - everything we learn in school, has been this - trying to explain to friends - who aren't scientific or spiritually inclined - this show nails it on both levels and rolls into lay terms - love Quantum physics - well - done...

  128. dave.eggermont
  129. dave.eggermont

    All I can say is that some stars just fade out and when more fades than what gets created, it goes extinct.

    Hope I've shed some light in there. :p

  130. Sarah Macdonald
  131. Sarah Macdonald

    /Micheal Rainey) - from my understanding yes the stars do burn out but this is over billions of yrs/ light yrs, some of them planet size or bigger when they blow up and collapse into smaller entities/ nebula - they still glow but at a smaller more dense rate compared to when they were/ are live in original state - the formation of a new star, surrounding gas and particle clouds - the amazingly colored cloud towards the last (15min of the show) is the birth of a new one - but it also takes billions of yrs to develop and doesn't develop as a big old star in the original form it takes on a more complex denser shape of gases, minerals and elements. its the original big stars that will die out and the sky we have now which is bright and wonderful - will be of smaller stars and constellations harder to see by the naked eye form earth - although there will be heaps burning bright they will be so small in comparison that from there to here it will appear and seem as though the sky is empty or filled with black holes. but as science, spirituality and q - physics states - all things are always moving fwd, the only constant is change itself - so as the universe is evolving , changing and moving fwd through time - which in space there is no time under all the light refractories - its only here on hertizon that there is time - after the big bang - which is 4th seal consciousness - Shiva -ultraviolet blue spectrum - not man or woman - big bang - 3rd - light refractory- polarity, 2nd - infrared, 1st seal consciousness - human - dense - matter occurred - therefor time - up there is no existent - all things happen simultaneously in multiple realities and dimensions. so as the universe is evolving so are we meant to be - it might be that after the earth goes through its massive change this yr and next we too will evolve and our skills abilities will evolve allowing us to see things more in detail than what we think we can now??.!!!

  132. Jonathan Liam Mcguire
  133. Jonathan Liam Mcguire

    there are 3 ways that a star collapse and destroy itself

  134. MaLi44
  135. MaLi44

    Not all stars create a nebula when they die, though there are actually two types of nebulae, those from supernovas and the planetary nebulae created by smaller stars very late in their life, during the red giant phase. It is only the large stars that go supernova upon their deaths and create the nebulae about which Professor Cox was speaking. From those nebulae are born new stars. Each of those new stars are formed from the gas and matter expelled by the parent star, so they would not be as large as that star since they are only made up from a percentage of the matter that existed within that original star. What this means is that when those stars, in turn, die, most of them will not be large enough to produce a supernova, and, therefore, will not give birth to children of their own. What this means is that there would come a time when there were no longer any stars large enough to go supernova. No more supernovas means no more star factories. So the death and birth cycle is not endless.

    This was supposed to be posted as a reply to Michael Rainey, but, for some reason, it appears that it didn't get put there.

  136. MaLi44
  137. MaLi44

    Please see my reply above, which I accidentally posted as a new comment.

  138. Keke Jones
  139. Keke Jones

    After everything dies and the universe is empty is there a chance that the big bang could take place again? Can the big bang take place before the end of earth? If it could what would happen? Would it create another universe? Would that be a paradox? I apologize for all the questions and excuse me if they make little to no sense but I'm 15 and intrigued by science.

  140. Keke Jones
  141. Keke Jones

    Thanks! :D

  142. Serapmical Santhenar
  143. Serapmical Santhenar

    It seems possible to me that at the end of the universe all that may be left is a superdense black hole which could mimic the conditions in the very early universe and then trigger a second big bang. This could even have happened before.
    If at the end of the universe all matter is converted to energy, how big is the universe? Without matter, there is no scale so the universe could be both infinitely big and infinitely small?
    Just a thought, but that's half of science right there.

  144. Justin Allen
  145. Justin Allen

    Even though when stars die they leave matter behind to create more stars, eventually there will be no matter left.Stars turn matter into energy.Eventually all the matter will either be converted, and photons will race across an ever increasing volume of space, or it will be sucked into a black hole,neutron star,white dwarf, and what have you.Eventually there will be nothing but degenerate matter left which slowly evaporates into nothingness.You need to understand quantum electrodynamics to get a grasp on this.Virtual particles and proton decay and the such.There will be a point when even the ultra advanced civilizations won't be able to "create more elements" because there will be no energy, and eventually no matter, that is not degenerate.There is really no such thing as renewable energy,not in the long run.Maybe one day we will learn to harness energy from gravity or create our own mini big bangs to keep us going,but even that is not endless.It is a fact that eventually the universe, and us, will die.There is but one escape, an alternate universe.Which may be impossible to reach, but maybe not.I do not know for I am but a mere mortal.The fact remains though that in the cosmological decade system, there is many hundreds of trillions of years of a future for life left.Although in the long run that is but a fleeting moment,to us it is almost infinite.A googol years from now ,when there is nothing but cold space and time has ceased because there is no way to measure it, there could be another big bang.Actually it is guaranteed there will be.And all of this will begin a new.The universe as a whole is infinite.The quantum sea of nothingness that everything arises from is infinite and ever fluctuating.But our universe as we know it. is not.Perhaps even a googol years is but a mere fraction of true deep time.Where time is truly infinite, but not in the sense we understand, anything and everything that can happen "will" happen an infinite amount of times.

  146. Mostafa
  147. Mostafa

    thanks Brian this documentary was really wonderful for me,the great space needs great minds

  148. Alexander
  149. Alexander

    watch again but this time try to focus

  150. Alexander
  151. Alexander

    i totally agree, and there is only one narrator who actually does the same thing and that is legendary Sir David Attenborough

  152. Robert Fernandez
  153. Robert Fernandez

    love to watch all this kinds of stuff when im stoned! hell yeah!

  154. Robert Fernandez
  155. Robert Fernandez

    thats a nice thought dude..

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