Death of the Universe | Wonders of the Universe w/ Brian Cox | BBC Studios — Transcript

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1. 0:00a black dwarf will be the final fate of
2. 0:03those last Stars white dwarves that have
3. 0:06become so cold that they barely emit any
4. 0:08more heat or
5. 0:14light black dwarves are dark dense
6. 0:17decaying balls of degenerate matter
7. 0:21little more than the ashes of
8. 0:24stars their constituent atoms are so
9. 0:28severely crushed that dwarves are a
10. 0:30million times denser than our
11. 0:34sun Stars take so long to reach this
12. 0:37point that after nearly 14 billion years
13. 0:40we believe there are currently no black
14. 0:43dwarves in the universe but despite
15. 0:46never seeing one we can still predict
16. 0:49how they will end their
17. 0:50days just as the iron that makes up this
18. 0:53ship will eventually rust and be carried
19. 0:57away by the Desert Winds so we think
20. 1:00that the matter inside black dwarves the
21. 1:02last matter in the universe will
22. 1:05eventually evaporate away and be carried
23. 1:09off into the void as radiation leaving
24. 1:13absolutely nothing
25. 1:17[Music]
26. 1:24behind with the black dwarves gone there
27. 1:27won't be a single atom of matter left
28. 1:32all that will remain of our once Rich
29. 1:35Cosmos will be particles of light and
30. 1:38black
31. 1:40[Music]
32. 1:45holes after an unimaginable length of
33. 1:48time even the black holes will have
34. 1:51evaporated and the universe will be
35. 1:54nothing but a sea of photons gradually
36. 1:58tending towards the same temp
37. 1:59temperature as the expansion of the
38. 2:01universe cools them towards absolute
39. 2:12zero and when I say unimaginable period
40. 2:15of time I really mean it it's 10,000
41. 2:18trillion trillion trillion trillion
42. 2:20trillion trillion trillion trillion
43. 2:23years how big is that number well if I
44. 2:26were to start counting with a single
45. 2:29atom representing one year then there
46. 2:32wouldn't be enough atoms in the entire
47. 2:35universe to get anywhere near that
48. 2:44number once the very last remnants of
49. 2:47the very last stars have finally decayed
50. 2:50away to nothing and everything reaches
51. 2:52the same temperature the story of the
52. 2:56universe finally comes to an end
53. 3:02for the first time in its life the
54. 3:05universe will be permanent and
55. 3:08unchanging entropy finally stops
56. 3:11increasing because the cosmos cannot get
57. 3:14any more
58. 3:15disordered nothing happens and it keeps
59. 3:18not happening
60. 3:25forever it's what's known as the heat
61. 3:27death of the universe an era when the
62. 3:30cosmos will remain vast and cold and
63. 3:34desolate for the rest of time and that's
64. 3:37because there is no difference between
65. 3:39the past the present and the future
66. 3:42there's no way of measuring the passage
67. 3:44of time because nothing in the cosmos
68. 3:48changes the arrow of time has simply
69. 3:51ceased to
70. 3:56[Music]
71. 3:58exist for