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These are the user uploaded subtitles that are being translated: 1 00:00:04,319 --> 00:00:07,680 black holes haunt our universe 2 00:00:07,680 --> 00:00:10,480 dark centers of gravity that swallow 3 00:00:10,480 --> 00:00:13,679 everything in their path 4 00:00:15,599 --> 00:00:19,440 what would you see if you got close 5 00:00:21,520 --> 00:00:25,840 and fell past the point of no return 6 00:00:26,720 --> 00:00:29,519 into another world of twisted space and 7 00:00:29,519 --> 00:00:31,840 time 8 00:00:33,680 --> 00:00:36,160 what secrets can we learn about the 9 00:00:36,160 --> 00:00:37,360 universe 10 00:00:37,360 --> 00:00:40,399 on a journey to the center of a monster 11 00:00:40,399 --> 00:00:45,840 black hole 12 00:00:51,430 --> 00:00:56,320 [Music] 13 00:00:56,320 --> 00:00:58,719 imagine traveling to the very center of 14 00:00:58,719 --> 00:01:01,600 our galaxy 15 00:01:02,079 --> 00:01:06,400 26 000 light years away 16 00:01:08,880 --> 00:01:11,119 and finding a vantage point on the night 17 00:01:11,119 --> 00:01:13,840 sky 18 00:01:14,560 --> 00:01:18,000 you'd see millions of stars 19 00:01:18,000 --> 00:01:21,520 and on the horizon a strange dark sphere 20 00:01:21,520 --> 00:01:24,080 rising 21 00:01:24,240 --> 00:01:27,759 it's a black hole an object so dense 22 00:01:27,759 --> 00:01:29,840 nothing can escape its gravitational 23 00:01:29,840 --> 00:01:30,880 pull 24 00:01:30,880 --> 00:01:33,759 not even light 25 00:01:35,600 --> 00:01:38,079 this monster is ten times the size of 26 00:01:38,079 --> 00:01:39,280 our sun 27 00:01:39,280 --> 00:01:42,479 yet millions of times heavier it's not 28 00:01:42,479 --> 00:01:43,439 the only one 29 00:01:43,439 --> 00:01:45,839 out there 30 00:01:46,640 --> 00:01:50,000 in nearly every large galaxy astronomers 31 00:01:50,000 --> 00:01:50,640 have found 32 00:01:50,640 --> 00:01:53,920 evidence of black holes millions even 33 00:01:53,920 --> 00:01:58,160 billions of times the mass of the sun 34 00:01:58,160 --> 00:02:01,330 [Music] 35 00:02:02,320 --> 00:02:04,960 how did they form and how did they get 36 00:02:04,960 --> 00:02:06,880 so large 37 00:02:06,880 --> 00:02:09,038 in the search for answers we are 38 00:02:09,038 --> 00:02:10,959 beginning to glimpse the forces that 39 00:02:10,959 --> 00:02:12,560 shape the stars 40 00:02:12,560 --> 00:02:16,319 planets even life 41 00:02:17,280 --> 00:02:19,520 and now by tracing the life cycle of 42 00:02:19,520 --> 00:02:20,959 black holes 43 00:02:20,959 --> 00:02:23,440 scientists are finding clues to the fate 44 00:02:23,440 --> 00:02:25,760 that awaits our galaxy 45 00:02:25,760 --> 00:02:27,720 and the universe at large 46 00:02:27,720 --> 00:02:31,280 [Music] 47 00:02:31,280 --> 00:02:33,680 but how do you study something that by 48 00:02:33,680 --> 00:02:34,319 nature 49 00:02:34,319 --> 00:02:37,760 evades detection sometimes the universe 50 00:02:37,760 --> 00:02:38,080 lets 51 00:02:38,080 --> 00:02:42,720 us in on its most mysterious workings 52 00:02:45,200 --> 00:02:49,040 march 19 2008 astronomers around the 53 00:02:49,040 --> 00:02:50,000 world receive 54 00:02:50,000 --> 00:02:52,800 an alert sent from an orbiting 55 00:02:52,800 --> 00:02:54,080 observatory called 56 00:02:54,080 --> 00:02:58,959 swift it had recorded a flash of gamma 57 00:02:58,959 --> 00:03:00,239 radiation 58 00:03:00,239 --> 00:03:03,040 a kind of ultra high energy light that 59 00:03:03,040 --> 00:03:07,519 is the signature of a cataclysmic event 60 00:03:09,519 --> 00:03:11,360 swift automatically relayed the 61 00:03:11,360 --> 00:03:14,959 information down to earth 62 00:03:15,760 --> 00:03:18,959 and within seconds robotic telescopes in 63 00:03:18,959 --> 00:03:20,800 north and south america 64 00:03:20,800 --> 00:03:25,040 turn their gaze on the rising light 65 00:03:28,640 --> 00:03:31,360 astronomers dial into the data to see 66 00:03:31,360 --> 00:03:32,159 how bright 67 00:03:32,159 --> 00:03:36,159 and powerful the flash had become 68 00:03:38,460 --> 00:03:40,879 [Music] 69 00:03:40,879 --> 00:03:43,120 meanwhile at giant observatories in 70 00:03:43,120 --> 00:03:44,799 chile 71 00:03:44,799 --> 00:03:49,519 and in texas they zero in on it 72 00:03:49,680 --> 00:03:52,080 using specialized instruments to split 73 00:03:52,080 --> 00:03:52,879 the light 74 00:03:52,879 --> 00:03:56,798 into all its different wavelengths 75 00:03:57,680 --> 00:03:59,519 that tells them how far the light had 76 00:03:59,519 --> 00:04:02,720 traveled to reach earth 77 00:04:03,760 --> 00:04:06,319 what they find is that it had come from 78 00:04:06,319 --> 00:04:06,799 seven 79 00:04:06,799 --> 00:04:09,599 and a half billion light years away 80 00:04:09,599 --> 00:04:15,839 halfway across the visible universe 81 00:04:16,079 --> 00:04:18,959 tom vestrand heads a robotic telescope 82 00:04:18,959 --> 00:04:19,918 project at the los 83 00:04:19,918 --> 00:04:23,520 alamos national lab in new mexico 84 00:04:23,520 --> 00:04:25,199 he has been tracking high-energy 85 00:04:25,199 --> 00:04:26,560 gamma-ray bursts 86 00:04:26,560 --> 00:04:29,280 for over a decade and has never seen 87 00:04:29,280 --> 00:04:30,160 anything 88 00:04:30,160 --> 00:04:32,720 like this 89 00:04:38,000 --> 00:04:40,560 it was the most luminous thing ever 90 00:04:40,560 --> 00:04:42,240 detected by mankind 91 00:04:42,240 --> 00:04:43,600 traditionally think of astronomy as 92 00:04:43,600 --> 00:04:45,600 something that happens very slowly 93 00:04:45,600 --> 00:04:46,800 but this was a thing that had been 94 00:04:46,800 --> 00:04:50,240 traveling to us for 7.5 billion years 95 00:04:50,240 --> 00:04:52,240 arrived here and for 30 seconds it was 96 00:04:52,240 --> 00:04:53,919 astonishingly bright 97 00:04:53,919 --> 00:04:56,720 amazingly bright minutes later even 98 00:04:56,720 --> 00:04:58,479 still showing signs of 99 00:04:58,479 --> 00:05:02,720 saturation it was so bright in fact 100 00:05:02,720 --> 00:05:06,720 that it was visible to the naked eye 101 00:05:09,520 --> 00:05:11,600 putting together evidence from ground 102 00:05:11,600 --> 00:05:13,360 and space telescopes 103 00:05:13,360 --> 00:05:15,360 astronomers determined that the flash 104 00:05:15,360 --> 00:05:16,400 was a narrow 105 00:05:16,400 --> 00:05:19,280 but intense beam of light and that most 106 00:05:19,280 --> 00:05:20,080 likely 107 00:05:20,080 --> 00:05:25,840 it broadcast the birth of a black hole 108 00:05:25,919 --> 00:05:28,479 this singular moment is the end point of 109 00:05:28,479 --> 00:05:30,240 a violent chain of events 110 00:05:30,240 --> 00:05:39,840 in the core of a large star 111 00:05:39,919 --> 00:05:42,160 all stars shine by burning light 112 00:05:42,160 --> 00:05:43,039 elements like 113 00:05:43,039 --> 00:05:46,320 hydrogen in the largest ones intense 114 00:05:46,320 --> 00:05:48,639 heat fuses these elements into heavier 115 00:05:48,639 --> 00:05:49,360 ones 116 00:05:49,360 --> 00:05:54,400 like carbon silicon and finally iron 117 00:05:56,479 --> 00:05:59,120 like hot air in a balloon heat and light 118 00:05:59,120 --> 00:06:01,120 from these nuclear fires 119 00:06:01,120 --> 00:06:03,039 creates an outward pressure that 120 00:06:03,039 --> 00:06:05,840 prevents the star's massive outer layers 121 00:06:05,840 --> 00:06:06,800 from collapsing 122 00:06:06,800 --> 00:06:11,440 inward eventually that fuel runs out 123 00:06:11,440 --> 00:06:13,600 the energy flows out through the star 124 00:06:13,600 --> 00:06:15,600 off into space it can't go on forever 125 00:06:15,600 --> 00:06:17,440 when the fuel runs out the star starts 126 00:06:17,440 --> 00:06:18,720 to shrink 127 00:06:18,720 --> 00:06:20,960 and when that iron core builds up to 128 00:06:20,960 --> 00:06:23,680 about 1.4 times the mass of the sun it 129 00:06:23,680 --> 00:06:25,440 can no longer hold itself 130 00:06:25,440 --> 00:06:27,280 up against the pressure and it will 131 00:06:27,280 --> 00:06:29,840 collapse 132 00:06:32,240 --> 00:06:34,880 in some cases as matter slams into the 133 00:06:34,880 --> 00:06:36,240 star's core 134 00:06:36,240 --> 00:06:39,120 the impact creates a powerful shock wave 135 00:06:39,120 --> 00:06:40,800 that races back out 136 00:06:40,800 --> 00:06:49,840 and literally blows the star apart 137 00:06:51,840 --> 00:06:53,520 our galaxy is littered with the 138 00:06:53,520 --> 00:06:56,160 scattered remains of these supernovae 139 00:06:56,160 --> 00:06:58,319 as shown in images like these from the 140 00:06:58,319 --> 00:07:01,440 hubble space telescope 141 00:07:01,440 --> 00:07:04,080 but what happens to the collapsed core 142 00:07:04,080 --> 00:07:07,520 of these dead stars 143 00:07:08,960 --> 00:07:11,919 when a large star implodes its weight is 144 00:07:11,919 --> 00:07:13,120 enough to squash 145 00:07:13,120 --> 00:07:15,759 all the atoms in its core down to their 146 00:07:15,759 --> 00:07:16,800 nuclei 147 00:07:16,800 --> 00:07:19,919 the result an ultra dense ember called 148 00:07:19,919 --> 00:07:23,440 a neutron star the 149 00:07:23,440 --> 00:07:26,560 density of a neutron star something like 150 00:07:26,560 --> 00:07:29,039 taking a mountain and crushing it down 151 00:07:29,039 --> 00:07:30,080 to the size of a 152 00:07:30,080 --> 00:07:33,919 marble about so big 153 00:07:34,400 --> 00:07:36,479 neutrons can withstand incredible 154 00:07:36,479 --> 00:07:38,960 pressures 155 00:07:39,919 --> 00:07:42,400 but if enough matter falls onto them 156 00:07:42,400 --> 00:07:44,400 beyond a critical threshold 157 00:07:44,400 --> 00:07:48,318 they can be crushed down to nothing 158 00:07:50,400 --> 00:07:55,520 when that happens a black hole is born 159 00:07:57,360 --> 00:07:59,919 a black hole is gravity taken to the 160 00:07:59,919 --> 00:08:01,120 extreme 161 00:08:01,120 --> 00:08:03,280 its mass is literally packed into a 162 00:08:03,280 --> 00:08:04,160 point 163 00:08:04,160 --> 00:08:06,479 and enshrouded within a dark sphere 164 00:08:06,479 --> 00:08:07,520 called the event 165 00:08:07,520 --> 00:08:11,199 horizon that sphere 166 00:08:11,199 --> 00:08:14,400 is the point of no return 167 00:08:14,400 --> 00:08:17,840 any gas stars or planets that fall in 168 00:08:17,840 --> 00:08:20,960 disappear forever a black hole 169 00:08:20,960 --> 00:08:23,599 is a region of space and time which is 170 00:08:23,599 --> 00:08:24,000 both 171 00:08:24,000 --> 00:08:27,520 black and empty it's black because light 172 00:08:27,520 --> 00:08:29,840 can't escape from it gravity pulls the 173 00:08:29,840 --> 00:08:30,639 light back 174 00:08:30,639 --> 00:08:34,159 but it's empty because the object or 175 00:08:34,159 --> 00:08:35,919 system that collapsed to form it in the 176 00:08:35,919 --> 00:08:37,440 first place has shriveled away to 177 00:08:37,440 --> 00:08:38,080 nothing 178 00:08:38,080 --> 00:08:41,279 the common idea that black hole is just 179 00:08:41,279 --> 00:08:44,159 made of very compacted matter it's wrong 180 00:08:44,159 --> 00:08:46,080 it's just simply wrong 181 00:08:46,080 --> 00:08:47,839 it may have been created from very 182 00:08:47,839 --> 00:08:50,160 compacted matter but the matter is gone 183 00:08:50,160 --> 00:08:50,720 it's been 184 00:08:50,720 --> 00:08:55,839 completely destroyed it no longer exists 185 00:08:57,440 --> 00:08:59,519 and yet it leaves behind a powerful 186 00:08:59,519 --> 00:09:00,560 legacy 187 00:09:00,560 --> 00:09:03,439 it's gravity 188 00:09:05,680 --> 00:09:08,320 according to albert einstein gravity is 189 00:09:08,320 --> 00:09:10,640 not just the attractive force of planets 190 00:09:10,640 --> 00:09:11,400 and suns 191 00:09:11,400 --> 00:09:16,320 [Music] 192 00:09:16,320 --> 00:09:19,440 it's a warping of space and time what 193 00:09:19,440 --> 00:09:20,480 scientists call 194 00:09:20,480 --> 00:09:23,040 space-time in the presence of massive 195 00:09:23,040 --> 00:09:25,599 objects 196 00:09:26,640 --> 00:09:29,440 a planet for example goes into orbit 197 00:09:29,440 --> 00:09:31,200 when it's caught in the warped space 198 00:09:31,200 --> 00:09:32,959 surrounding a star 199 00:09:32,959 --> 00:09:35,040 like a ball spinning around a roulette 200 00:09:35,040 --> 00:09:36,960 wheel 201 00:09:36,960 --> 00:09:38,959 [Music] 202 00:09:38,959 --> 00:09:41,360 with the mass of a star squashed down to 203 00:09:41,360 --> 00:09:42,320 a point 204 00:09:42,320 --> 00:09:44,640 a black hole is a deep puncture in 205 00:09:44,640 --> 00:09:47,439 space-time 206 00:09:47,920 --> 00:09:51,040 when a black hole is born the energy 207 00:09:51,040 --> 00:09:51,680 gets 208 00:09:51,680 --> 00:09:54,240 transformed from the energy of the 209 00:09:54,240 --> 00:09:56,000 matter 210 00:09:56,000 --> 00:09:59,279 to the energy of warp space-time 211 00:09:59,279 --> 00:10:01,600 so it's a transformation of the form of 212 00:10:01,600 --> 00:10:02,399 the energy 213 00:10:02,399 --> 00:10:04,320 from one to another but the energy is 214 00:10:04,320 --> 00:10:06,480 still conserved 215 00:10:06,480 --> 00:10:08,240 what you're left behind with is warped 216 00:10:08,240 --> 00:10:10,160 space-time that has a huge amount of 217 00:10:10,160 --> 00:10:12,880 energy in it 218 00:10:14,880 --> 00:10:17,680 with that energy a black hole can affect 219 00:10:17,680 --> 00:10:18,800 its environment 220 00:10:18,800 --> 00:10:22,160 in profound ways 221 00:10:22,160 --> 00:10:25,770 [Music] 222 00:10:26,160 --> 00:10:28,959 on our planet earth we know gravity is 223 00:10:28,959 --> 00:10:32,320 the force that brings everything down 224 00:10:32,320 --> 00:10:37,200 the impact releases energy a crash 225 00:10:41,760 --> 00:10:47,839 a thud 226 00:10:48,160 --> 00:10:50,880 a shatter 227 00:10:51,590 --> 00:10:59,030 [Music] 228 00:10:59,680 --> 00:11:02,240 when matter falls toward a black hole 229 00:11:02,240 --> 00:11:04,000 the energy released can reach 230 00:11:04,000 --> 00:11:07,760 astronomical proportions 231 00:11:08,880 --> 00:11:11,120 when we look at how they affect the rest 232 00:11:11,120 --> 00:11:12,880 of the universe we look at what happens 233 00:11:12,880 --> 00:11:15,040 around them what happens when 234 00:11:15,040 --> 00:11:18,720 stuff exploits this huge gravitational 235 00:11:18,720 --> 00:11:19,680 potential this 236 00:11:19,680 --> 00:11:22,160 huge gravitational hole that they form 237 00:11:22,160 --> 00:11:22,720 and 238 00:11:22,720 --> 00:11:28,399 how that is exploited to make energy 239 00:11:28,399 --> 00:11:30,720 such energy emissions are part of a 240 00:11:30,720 --> 00:11:32,720 growing body of evidence 241 00:11:32,720 --> 00:11:35,440 that black holes famous for hiding in 242 00:11:35,440 --> 00:11:36,480 the dark 243 00:11:36,480 --> 00:11:38,399 have a history of outbursts that have 244 00:11:38,399 --> 00:11:40,399 reached across the cosmos 245 00:11:40,399 --> 00:11:44,240 and shaped the universe we know 246 00:11:48,320 --> 00:11:50,880 scientists are following this energy 247 00:11:50,880 --> 00:11:53,040 like a trail of clues 248 00:11:53,040 --> 00:11:55,839 leading ever closer to the black hole's 249 00:11:55,839 --> 00:11:58,639 dark heart 250 00:12:09,760 --> 00:12:13,040 astronomers once saw black holes as rare 251 00:12:13,040 --> 00:12:14,240 and exotic 252 00:12:14,240 --> 00:12:16,560 in a universe seemingly dominated by 253 00:12:16,560 --> 00:12:17,360 stars 254 00:12:17,360 --> 00:12:20,320 and galaxies 255 00:12:22,399 --> 00:12:25,279 a radically new view has emerged from 256 00:12:25,279 --> 00:12:26,800 surveys of galaxies 257 00:12:26,800 --> 00:12:29,360 and black holes stretching deep into the 258 00:12:29,360 --> 00:12:31,920 universe 259 00:12:35,680 --> 00:12:38,720 giant black holes lurk in the dust lanes 260 00:12:38,720 --> 00:12:40,639 and swirling gas clouds 261 00:12:40,639 --> 00:12:42,639 at the centers of nearly every large 262 00:12:42,639 --> 00:12:44,800 galaxy 263 00:12:44,800 --> 00:12:47,760 what's more the larger the galaxy the 264 00:12:47,760 --> 00:12:49,839 larger the black hole 265 00:12:49,839 --> 00:12:51,519 that's a clue that they must have 266 00:12:51,519 --> 00:12:53,519 evolved hand in hand 267 00:12:53,519 --> 00:12:58,000 each shaping the life story of the other 268 00:13:01,120 --> 00:13:03,600 to find out the role black holes played 269 00:13:03,600 --> 00:13:05,760 in the evolution of the universe 270 00:13:05,760 --> 00:13:08,079 astronomers are trying to recreate this 271 00:13:08,079 --> 00:13:09,440 shared history 272 00:13:09,440 --> 00:13:11,680 with what amounts to a whole new branch 273 00:13:11,680 --> 00:13:13,650 of science 274 00:13:13,650 --> 00:13:14,880 [Music] 275 00:13:14,880 --> 00:13:17,040 they are using supercomputers to 276 00:13:17,040 --> 00:13:18,560 simulate the sweep of 277 00:13:18,560 --> 00:13:21,200 cosmic history including that of 278 00:13:21,200 --> 00:13:22,160 galaxies 279 00:13:22,160 --> 00:13:24,010 like our own 280 00:13:24,010 --> 00:13:28,079 [Music] 281 00:13:28,079 --> 00:13:30,720 this simulation takes us back to just a 282 00:13:30,720 --> 00:13:32,800 few hundred million years 283 00:13:32,800 --> 00:13:36,800 after the beginning of the universe 284 00:13:37,920 --> 00:13:41,040 gravity drew vast pockets of gas 285 00:13:41,040 --> 00:13:44,240 into dense centers 286 00:13:45,279 --> 00:13:48,240 they grew hotter and hotter igniting to 287 00:13:48,240 --> 00:13:52,560 become the first generation of stars 288 00:13:53,680 --> 00:13:56,800 these stars lived hot and fast and in 289 00:13:56,800 --> 00:13:58,720 only a few million years 290 00:13:58,720 --> 00:14:03,839 some blew up in powerful supernovae 291 00:14:05,600 --> 00:14:08,000 from these stars likely came the first 292 00:14:08,000 --> 00:14:08,959 generation 293 00:14:08,959 --> 00:14:12,079 of black holes 294 00:14:14,880 --> 00:14:18,240 cosmologists tiziana di mateo is part of 295 00:14:18,240 --> 00:14:20,720 a wider effort to see what mark these 296 00:14:20,720 --> 00:14:22,240 early black holes 297 00:14:22,240 --> 00:14:25,360 left on the universe 298 00:14:25,519 --> 00:14:27,760 her computer program simulates the 299 00:14:27,760 --> 00:14:30,160 action of gravity on gas 300 00:14:30,160 --> 00:14:33,120 the formation of stars galaxies and 301 00:14:33,120 --> 00:14:35,920 black holes 302 00:14:37,279 --> 00:14:40,320 her goal is to create a virtual universe 303 00:14:40,320 --> 00:14:43,120 that evolves like the real one did with 304 00:14:43,120 --> 00:14:45,519 black holes and galaxies emerging 305 00:14:45,519 --> 00:14:48,880 and growing together 306 00:14:52,160 --> 00:14:54,800 our milky way galaxy is located in a 307 00:14:54,800 --> 00:14:56,720 quiet part of the universe 308 00:14:56,720 --> 00:14:58,800 with relatively few other galaxies 309 00:14:58,800 --> 00:15:00,800 around it 310 00:15:00,800 --> 00:15:03,760 move out across the cosmic void 50 311 00:15:03,760 --> 00:15:05,680 million light years away 312 00:15:05,680 --> 00:15:07,600 and you encounter the great virgo 313 00:15:07,600 --> 00:15:10,839 cluster filled with thousands of 314 00:15:10,839 --> 00:15:12,560 galaxies 315 00:15:12,560 --> 00:15:14,959 recent telescope surveys show that this 316 00:15:14,959 --> 00:15:15,760 region 317 00:15:15,760 --> 00:15:18,560 is part of a larger pattern of galaxies 318 00:15:18,560 --> 00:15:19,920 resembling a vast 319 00:15:19,920 --> 00:15:22,800 spider's web 320 00:15:23,199 --> 00:15:25,839 to get her virtual universe to look like 321 00:15:25,839 --> 00:15:26,720 this 322 00:15:26,720 --> 00:15:29,040 tiziana needs to know what cosmic 323 00:15:29,040 --> 00:15:30,800 conditions gave rise 324 00:15:30,800 --> 00:15:33,759 to black holes and galaxies in the first 325 00:15:33,759 --> 00:15:35,199 place 326 00:15:35,199 --> 00:15:36,880 so it's a beautiful problem because we 327 00:15:36,880 --> 00:15:38,480 start from extremely well specified 328 00:15:38,480 --> 00:15:39,680 initial conditions 329 00:15:39,680 --> 00:15:41,199 we know the initial condition of the 330 00:15:41,199 --> 00:15:42,560 universe and that's very rare in 331 00:15:42,560 --> 00:15:44,480 astrophysics in cosmology in 332 00:15:44,480 --> 00:15:48,800 you know in any branch of physics 333 00:15:48,880 --> 00:15:51,360 details of what the universe was like in 334 00:15:51,360 --> 00:15:53,120 its earliest times 335 00:15:53,120 --> 00:15:55,040 have come courtesy of a breakthrough 336 00:15:55,040 --> 00:15:56,160 observatory 337 00:15:56,160 --> 00:16:00,399 called wmap it found a blotchy pattern 338 00:16:00,399 --> 00:16:02,240 in a kind of radiation 339 00:16:02,240 --> 00:16:04,910 generated soon after the big bang 340 00:16:04,910 --> 00:16:06,399 [Music] 341 00:16:06,399 --> 00:16:08,720 astronomers believe this pattern is the 342 00:16:08,720 --> 00:16:11,120 origin of the spider's web structure 343 00:16:11,120 --> 00:16:14,399 they see in their telescopes 344 00:16:14,399 --> 00:16:16,639 it defines the beginning point of 345 00:16:16,639 --> 00:16:18,959 tisiana's simulation 346 00:16:18,959 --> 00:16:20,560 on top of that now we need to put the 347 00:16:20,560 --> 00:16:22,639 right physics in order to 348 00:16:22,639 --> 00:16:24,399 take these initial conditions evolve 349 00:16:24,399 --> 00:16:26,800 them and make the universe the way it 350 00:16:26,800 --> 00:16:27,440 looks like 351 00:16:27,440 --> 00:16:32,320 today she sets her virtual universe in 352 00:16:32,320 --> 00:16:34,720 motion 353 00:16:34,720 --> 00:16:36,800 it covers a region in the shape of a 354 00:16:36,800 --> 00:16:39,759 cube over a hundred million light years 355 00:16:39,759 --> 00:16:42,880 on a side the result an 356 00:16:42,880 --> 00:16:45,519 intricate cosmic web with gravity 357 00:16:45,519 --> 00:16:48,320 drawing matter into filaments and knots 358 00:16:48,320 --> 00:16:51,839 on the largest of scales 359 00:16:52,000 --> 00:16:54,639 in places where filaments come together 360 00:16:54,639 --> 00:16:55,440 galaxies 361 00:16:55,440 --> 00:16:59,360 and black holes first begin to appear 362 00:16:59,360 --> 00:17:01,279 all the matter that is coming in from 363 00:17:01,279 --> 00:17:03,199 the large scale will also allow 364 00:17:03,199 --> 00:17:06,400 the black hole to to grow 365 00:17:06,400 --> 00:17:08,160 because of this gas is being transported 366 00:17:08,160 --> 00:17:09,599 from large scale all the way into the 367 00:17:09,599 --> 00:17:11,520 galaxy and the galaxy all the way into 368 00:17:11,520 --> 00:17:12,559 the center 369 00:17:12,559 --> 00:17:15,119 and therefore feeding and growing these 370 00:17:15,119 --> 00:17:19,839 central black holes at a very high rate 371 00:17:22,240 --> 00:17:24,000 in this sequence drawn from her 372 00:17:24,000 --> 00:17:26,000 simulation the circles 373 00:17:26,000 --> 00:17:28,319 indicate the appearance of black holes 374 00:17:28,319 --> 00:17:32,559 within the data 375 00:17:32,559 --> 00:17:35,280 what she finds is that as these black 376 00:17:35,280 --> 00:17:36,240 holes gain 377 00:17:36,240 --> 00:17:38,640 mass gravity pulls them toward the 378 00:17:38,640 --> 00:17:40,160 densest regions 379 00:17:40,160 --> 00:17:42,160 where a few grow larger than all the 380 00:17:42,160 --> 00:17:44,559 rest 381 00:17:45,120 --> 00:17:48,160 how did these chosen few black holes 382 00:17:48,160 --> 00:17:51,360 grow so rapidly 383 00:17:51,840 --> 00:17:54,720 the orbiting chandra x-ray observatory 384 00:17:54,720 --> 00:17:56,559 recently turned up evidence at the 385 00:17:56,559 --> 00:17:58,320 centers of galaxies 386 00:17:58,320 --> 00:18:02,559 back in the time of the early universe 387 00:18:03,440 --> 00:18:06,960 these images show its remarkable find 388 00:18:06,960 --> 00:18:10,240 actual supermassive black hole pairs 389 00:18:10,240 --> 00:18:12,720 beginning what astronomers believe is a 390 00:18:12,720 --> 00:18:15,840 dance of death 391 00:18:21,039 --> 00:18:23,840 in most cases their forward momentum 392 00:18:23,840 --> 00:18:25,919 simply causes them to go into orbit 393 00:18:25,919 --> 00:18:27,360 around each other 394 00:18:27,360 --> 00:18:30,240 like a planet around a sun this orbit 395 00:18:30,240 --> 00:18:34,320 can go on for billions of years 396 00:18:34,320 --> 00:18:37,280 to grow large one black hole must draw 397 00:18:37,280 --> 00:18:37,840 the other 398 00:18:37,840 --> 00:18:43,840 in close enough to swallow it 399 00:18:44,720 --> 00:18:47,760 albert einstein showed how they do it 400 00:18:47,760 --> 00:18:49,760 he predicted that when massive bodies 401 00:18:49,760 --> 00:18:52,480 accelerate or whip around each other 402 00:18:52,480 --> 00:18:54,480 they can stir up the normally smooth 403 00:18:54,480 --> 00:18:57,840 fabric of space-time 404 00:18:59,120 --> 00:19:01,120 [Music] 405 00:19:01,120 --> 00:19:04,160 it's like a rock hitting a pond 406 00:19:04,160 --> 00:19:06,400 some of the energy of the impact is 407 00:19:06,400 --> 00:19:08,000 transferred to waves 408 00:19:08,000 --> 00:19:10,550 that move outward along the surface 409 00:19:10,550 --> 00:19:13,609 [Music] 410 00:19:15,120 --> 00:19:17,760 likewise a titanic collision of black 411 00:19:17,760 --> 00:19:18,720 holes 412 00:19:18,720 --> 00:19:22,000 would send waves gravity waves racing 413 00:19:22,000 --> 00:19:24,559 across the universe so you have two 414 00:19:24,559 --> 00:19:26,960 tornadoes embedded in a third larger 415 00:19:26,960 --> 00:19:28,080 tornado 416 00:19:28,080 --> 00:19:29,360 and they're going to come crashing 417 00:19:29,360 --> 00:19:30,960 together and you want to know what 418 00:19:30,960 --> 00:19:31,919 happens 419 00:19:31,919 --> 00:19:33,919 when these tornadoes are not made from 420 00:19:33,919 --> 00:19:36,400 whirling air but made from whirling warp 421 00:19:36,400 --> 00:19:39,760 space and time 422 00:19:39,760 --> 00:19:42,640 this simulation shows what happens as 423 00:19:42,640 --> 00:19:44,799 two black holes get close 424 00:19:44,799 --> 00:19:47,200 they turn space into a turbulent sea of 425 00:19:47,200 --> 00:19:49,600 gravity waves 426 00:19:49,600 --> 00:19:51,600 these waves have the effect of carrying 427 00:19:51,600 --> 00:19:54,799 energy away from the orbit itself 428 00:19:54,799 --> 00:19:57,039 that allows the pair to draw each other 429 00:19:57,039 --> 00:19:58,000 in and 430 00:19:58,000 --> 00:20:01,280 merge into one 431 00:20:01,280 --> 00:20:03,440 we go back to half the age of the 432 00:20:03,440 --> 00:20:04,320 universe and 433 00:20:04,320 --> 00:20:05,760 all these black holes are swallowing 434 00:20:05,760 --> 00:20:07,600 large amounts of gas so 435 00:20:07,600 --> 00:20:09,360 it's a fun time and sort of the golden 436 00:20:09,360 --> 00:20:11,919 age for the growth of most black holes 437 00:20:11,919 --> 00:20:14,000 the reason why this because most of the 438 00:20:14,000 --> 00:20:16,480 large major mergers are occurring 439 00:20:16,480 --> 00:20:21,520 in the universe around this time 440 00:20:21,520 --> 00:20:24,240 this simulation shows how a galaxy like 441 00:20:24,240 --> 00:20:25,120 our own 442 00:20:25,120 --> 00:20:27,200 might have taken shape in a flurry of 443 00:20:27,200 --> 00:20:35,440 mergers and collisions 444 00:20:35,440 --> 00:20:38,000 in the beginning gravity drew patches of 445 00:20:38,000 --> 00:20:39,120 stars and gas 446 00:20:39,120 --> 00:20:44,639 together a new larger patch drew still 447 00:20:46,840 --> 00:20:48,000 others 448 00:20:48,000 --> 00:20:50,400 in fact the universe is littered with 449 00:20:50,400 --> 00:20:52,159 galaxies in the process 450 00:20:52,159 --> 00:20:54,799 of ripping each other apart and crashing 451 00:20:54,799 --> 00:20:56,960 together 452 00:20:56,960 --> 00:20:59,600 in the turmoil of each new merger 453 00:20:59,600 --> 00:21:02,240 another victim is thrust into the jaws 454 00:21:02,240 --> 00:21:04,190 of a growing black hole 455 00:21:04,190 --> 00:21:08,240 [Music] 456 00:21:08,240 --> 00:21:10,159 and in the densest regions of the 457 00:21:10,159 --> 00:21:12,960 universe a small percentage of these 458 00:21:12,960 --> 00:21:15,360 monsters have been able to grow to a 459 00:21:15,360 --> 00:21:16,000 level of 460 00:21:16,000 --> 00:21:18,799 size and ferocity we can scarcely 461 00:21:18,799 --> 00:21:20,559 imagine 462 00:21:20,559 --> 00:21:23,919 and yet amid all the violence are clues 463 00:21:23,919 --> 00:21:25,360 to how the universe 464 00:21:25,360 --> 00:21:28,640 and even places like earth came to be 465 00:21:28,640 --> 00:21:31,840 what they are 466 00:21:39,390 --> 00:21:41,679 [Music] 467 00:21:41,679 --> 00:21:44,000 astronomers have long puzzled over a 468 00:21:44,000 --> 00:21:46,559 class of ultra bright beacons of light 469 00:21:46,559 --> 00:21:49,360 from the distant universe called quasars 470 00:21:49,360 --> 00:21:52,159 [Music] 471 00:21:52,159 --> 00:21:54,799 in time they link them to the outpouring 472 00:21:54,799 --> 00:21:57,360 of energy from the centers of galaxies 473 00:21:57,360 --> 00:22:01,039 and to growing black holes but how can 474 00:22:01,039 --> 00:22:03,200 something that emits no light 475 00:22:03,200 --> 00:22:06,480 shines so brightly 476 00:22:07,520 --> 00:22:10,080 two minutes 477 00:22:10,559 --> 00:22:12,960 the chance to solve this mystery has 478 00:22:12,960 --> 00:22:15,360 drawn a crowd near nasa's kennedy space 479 00:22:15,360 --> 00:22:16,000 center 480 00:22:16,000 --> 00:22:19,760 in florida 80 seconds 481 00:22:19,760 --> 00:22:23,919 ranges go mounted in the nose of a 482 00:22:23,919 --> 00:22:25,760 rocket just up the beach 483 00:22:25,760 --> 00:22:29,200 is the next generation cosmic explorer 484 00:22:29,200 --> 00:22:32,320 ten nine eight 485 00:22:32,320 --> 00:22:36,240 seven six five four 486 00:22:36,240 --> 00:22:40,000 three two one go 487 00:22:40,000 --> 00:22:43,919 zero lift off the delta rocket carrying 488 00:22:43,919 --> 00:22:46,799 blast gamma-ray telescope circuit the 489 00:22:46,799 --> 00:22:49,280 fermi gamma-ray space telescope 490 00:22:49,280 --> 00:22:51,440 is part of a larger effort to explore 491 00:22:51,440 --> 00:22:53,440 the role black holes play 492 00:22:53,440 --> 00:23:09,840 in shaping the universe 493 00:23:16,640 --> 00:23:19,520 to me the idea that we're standing here 494 00:23:19,520 --> 00:23:20,159 on this 495 00:23:20,159 --> 00:23:23,440 planet in our own little area of our 496 00:23:23,440 --> 00:23:24,320 galaxy 497 00:23:24,320 --> 00:23:26,559 we're able to look around and make 498 00:23:26,559 --> 00:23:27,840 meaningful measurements 499 00:23:27,840 --> 00:23:30,000 have a theoretical understanding of the 500 00:23:30,000 --> 00:23:32,080 entire universe in which we live 501 00:23:32,080 --> 00:23:35,280 to me is something that all of humankind 502 00:23:35,280 --> 00:23:39,520 can justifiably take pride in 503 00:23:42,000 --> 00:23:44,559 the black holes that interest steve ritz 504 00:23:44,559 --> 00:23:45,919 a project scientist 505 00:23:45,919 --> 00:23:48,640 and his team are among the largest ones 506 00:23:48,640 --> 00:23:51,840 out there 507 00:23:52,880 --> 00:23:55,279 the energy they emit is thought to stem 508 00:23:55,279 --> 00:23:57,600 from periods of rapid growth 509 00:23:57,600 --> 00:24:00,780 at the center of galactic feeding 510 00:24:00,780 --> 00:24:02,840 [Music] 511 00:24:02,840 --> 00:24:04,799 frenzies 512 00:24:04,799 --> 00:24:07,279 billions of years ago in places where 513 00:24:07,279 --> 00:24:09,840 the universe was dense with matter 514 00:24:09,840 --> 00:24:12,799 gravity drew swarms of young galaxies 515 00:24:12,799 --> 00:24:14,570 hurtling toward each other 516 00:24:14,570 --> 00:24:17,200 [Music] 517 00:24:17,200 --> 00:24:19,919 a large galaxy grew in the center and 518 00:24:19,919 --> 00:24:21,440 when another galaxy fell 519 00:24:21,440 --> 00:24:24,080 toward it it hurled matter at a central 520 00:24:24,080 --> 00:24:26,559 black hole 521 00:24:26,559 --> 00:24:29,200 force-fed like this the black hole could 522 00:24:29,200 --> 00:24:30,400 grow up to several 523 00:24:30,400 --> 00:24:34,480 billion times the size of our own sun 524 00:24:34,480 --> 00:24:36,480 this crazy growth that black holes will 525 00:24:36,480 --> 00:24:38,159 go through particularly early on 526 00:24:38,159 --> 00:24:40,880 this would be a rare event not 527 00:24:40,880 --> 00:24:42,480 everywhere in a universe particularly 528 00:24:42,480 --> 00:24:43,760 when the universe is 529 00:24:43,760 --> 00:24:46,720 still young we'll have this huge gas 530 00:24:46,720 --> 00:24:48,240 inflows that will allow 531 00:24:48,240 --> 00:24:52,640 the black hole to grow so fast 532 00:24:54,000 --> 00:24:57,360 and when a supermassive black hole grows 533 00:24:57,360 --> 00:24:59,360 it bends its rage on the surrounding 534 00:24:59,360 --> 00:25:01,840 universe 535 00:25:03,039 --> 00:25:04,960 you can see the evidence in these 536 00:25:04,960 --> 00:25:06,720 telescope images 537 00:25:06,720 --> 00:25:09,440 they show powerful beams of energy or 538 00:25:09,440 --> 00:25:10,240 jets 539 00:25:10,240 --> 00:25:12,799 coming from the centers of galaxies and 540 00:25:12,799 --> 00:25:13,760 often extending 541 00:25:13,760 --> 00:25:16,240 tens of thousands of light years into 542 00:25:16,240 --> 00:25:18,720 space 543 00:25:23,120 --> 00:25:25,279 such outbursts can have a profound 544 00:25:25,279 --> 00:25:26,880 impact on their host 545 00:25:26,880 --> 00:25:30,559 galaxies and beyond 546 00:25:32,159 --> 00:25:34,960 probing the perseus galaxy cluster the 547 00:25:34,960 --> 00:25:36,880 chandra x-ray observatory 548 00:25:36,880 --> 00:25:40,000 found immense hot cavities hollowed out 549 00:25:40,000 --> 00:25:43,840 of the surrounding gas 550 00:25:46,240 --> 00:25:48,799 the culprit they believe is a jet of 551 00:25:48,799 --> 00:25:49,760 radiation 552 00:25:49,760 --> 00:25:56,559 coming from a large central galaxy 553 00:25:56,559 --> 00:25:59,520 as it roared out this jet created shock 554 00:25:59,520 --> 00:26:01,120 waves so powerful 555 00:26:01,120 --> 00:26:03,840 it pushed huge volumes of gas beyond the 556 00:26:03,840 --> 00:26:05,130 central region 557 00:26:05,130 --> 00:26:07,279 [Music] 558 00:26:07,279 --> 00:26:10,320 and without this gas new stars can't 559 00:26:10,320 --> 00:26:11,590 form 560 00:26:11,590 --> 00:26:13,360 [Music] 561 00:26:13,360 --> 00:26:15,520 that explains why some of the largest 562 00:26:15,520 --> 00:26:16,559 galaxies 563 00:26:16,559 --> 00:26:19,679 are filled with old stars most likely 564 00:26:19,679 --> 00:26:22,840 born before their black holes began 565 00:26:22,840 --> 00:26:24,240 erupting 566 00:26:24,240 --> 00:26:27,120 at the same time a black hole jet can 567 00:26:27,120 --> 00:26:27,600 seed 568 00:26:27,600 --> 00:26:30,080 the surrounding regions with the heavy 569 00:26:30,080 --> 00:26:31,440 elements needed to form 570 00:26:31,440 --> 00:26:35,760 solar systems and planets like ours 571 00:26:35,760 --> 00:26:37,520 we see these jets of particles being 572 00:26:37,520 --> 00:26:39,600 blown clear out of the galaxy 573 00:26:39,600 --> 00:26:41,279 and they're mysterious because we know 574 00:26:41,279 --> 00:26:42,640 when they're pointed 575 00:26:42,640 --> 00:26:44,960 roughly in our direction they're very 576 00:26:44,960 --> 00:26:46,559 strong emitters of very high energy 577 00:26:46,559 --> 00:26:49,039 gamma rays 578 00:26:50,159 --> 00:26:52,320 the fermi telescope joins a growing 579 00:26:52,320 --> 00:26:54,720 fleet of observatories in space 580 00:26:54,720 --> 00:26:56,559 capable of reading the high-energy 581 00:26:56,559 --> 00:26:58,720 x-rays and gamma rays 582 00:26:58,720 --> 00:27:01,520 associated with these jets it's rather 583 00:27:01,520 --> 00:27:02,000 like 584 00:27:02,000 --> 00:27:05,039 seeing a track of bullets and 585 00:27:05,039 --> 00:27:07,679 trying to follow the forensics down to 586 00:27:07,679 --> 00:27:09,760 what gun could have fired the bullet 587 00:27:09,760 --> 00:27:11,360 where was the gun what were the 588 00:27:11,360 --> 00:27:13,039 properties of the gunpowder 589 00:27:13,039 --> 00:27:15,760 and so on 590 00:27:17,120 --> 00:27:20,159 the gun in this case is a mysterious 591 00:27:20,159 --> 00:27:22,320 whirling region of space-time 592 00:27:22,320 --> 00:27:26,000 the black hole but what allows the gun 593 00:27:26,000 --> 00:27:27,039 to fire 594 00:27:27,039 --> 00:27:30,320 and produce a jet black hole also has 595 00:27:30,320 --> 00:27:32,640 the property that as it spins on its 596 00:27:32,640 --> 00:27:34,640 axis as the earth spins 597 00:27:34,640 --> 00:27:37,440 it drags space into a whirling motion 598 00:27:37,440 --> 00:27:39,279 like the air in a tornado 599 00:27:39,279 --> 00:27:41,760 faster near the horizon slower farther 600 00:27:41,760 --> 00:27:43,120 away just as the air in the 601 00:27:43,120 --> 00:27:46,000 tornado is swirling faster near the core 602 00:27:46,000 --> 00:27:49,840 than it is farther away 603 00:27:50,640 --> 00:27:53,840 in the eye of this cosmic tornado gas 604 00:27:53,840 --> 00:27:56,240 and stars flow into the hole along a 605 00:27:56,240 --> 00:28:03,279 rapidly spinning disk 606 00:28:03,279 --> 00:28:05,600 the spinning motion generates magnetic 607 00:28:05,600 --> 00:28:06,399 fields 608 00:28:06,399 --> 00:28:10,799 that twist around as matter swirls in 609 00:28:11,120 --> 00:28:12,799 these fields channel some of the 610 00:28:12,799 --> 00:28:14,159 inflowing matter 611 00:28:14,159 --> 00:28:18,480 out into a pair of high-energy jets 612 00:28:19,039 --> 00:28:22,480 so we can extract then the 613 00:28:22,480 --> 00:28:25,200 rotational energy of a black hole nature 614 00:28:25,200 --> 00:28:26,720 can extract it 615 00:28:26,720 --> 00:28:28,960 and the amount of energy you get out is 616 00:28:28,960 --> 00:28:31,039 enormously larger 617 00:28:31,039 --> 00:28:33,600 than all the energy you can get from 618 00:28:33,600 --> 00:28:35,520 burning all the nuclear fuel inside the 619 00:28:35,520 --> 00:28:38,000 stars 620 00:28:39,360 --> 00:28:42,240 it's the equations of albert einstein 621 00:28:42,240 --> 00:28:43,919 that describe the source of this 622 00:28:43,919 --> 00:28:45,679 incredible power 623 00:28:45,679 --> 00:28:48,159 the extreme warping of space just 624 00:28:48,159 --> 00:28:51,679 outside the black hole 625 00:28:51,919 --> 00:28:54,559 what we can learn from these equations 626 00:28:54,559 --> 00:28:57,279 doesn't stop at the event horizon 627 00:28:57,279 --> 00:28:59,520 they can also let us enter with our 628 00:28:59,520 --> 00:29:00,480 minds 629 00:29:00,480 --> 00:29:04,399 the realm within a black hole 630 00:29:05,039 --> 00:29:07,440 most likely we'll never directly see how 631 00:29:07,440 --> 00:29:09,760 those equations play out 632 00:29:09,760 --> 00:29:12,880 and live to tell 633 00:29:12,880 --> 00:29:16,159 a future explorer prospecting for data 634 00:29:16,159 --> 00:29:20,559 would tempt fate by traveling too close 635 00:29:20,559 --> 00:29:23,200 if the monster is a collapsed star 636 00:29:23,200 --> 00:29:26,240 weighing a few times the mass of the sun 637 00:29:26,240 --> 00:29:29,520 its gravity rises sharply 638 00:29:29,520 --> 00:29:31,840 the pull on the starship's nose is so 639 00:29:31,840 --> 00:29:32,799 much greater 640 00:29:32,799 --> 00:29:38,320 than on its tail the gravity rips it to 641 00:29:38,840 --> 00:29:41,840 shreds 642 00:29:45,200 --> 00:29:48,000 ironically you'd find a gentler ride 643 00:29:48,000 --> 00:29:50,880 into a supermassive black hole 644 00:29:50,880 --> 00:29:53,360 its larger size means its gravity is 645 00:29:53,360 --> 00:29:54,080 more spread 646 00:29:54,080 --> 00:29:55,600 out 647 00:29:55,600 --> 00:29:58,820 [Music] 648 00:29:59,279 --> 00:30:02,320 what you'd find if you made it inside 649 00:30:02,320 --> 00:30:05,520 is the most extreme destination in all 650 00:30:05,520 --> 00:30:09,840 the universe 651 00:30:10,460 --> 00:30:18,880 [Music] 652 00:30:18,880 --> 00:30:21,440 andrew hamilton an astrophysics 653 00:30:21,440 --> 00:30:22,320 professor 654 00:30:22,320 --> 00:30:24,480 has been investigating what happens when 655 00:30:24,480 --> 00:30:25,440 matter falls 656 00:30:25,440 --> 00:30:37,840 inside a black hole 657 00:30:38,640 --> 00:30:41,679 using einstein's equations he and 658 00:30:41,679 --> 00:30:43,520 other scientists believe that falling 659 00:30:43,520 --> 00:30:45,200 into a black hole 660 00:30:45,200 --> 00:30:47,679 is equivalent to moving down a river and 661 00:30:47,679 --> 00:30:51,840 tumbling over a waterfall 662 00:30:55,919 --> 00:30:58,640 like a cosmic precipice the outermost 663 00:30:58,640 --> 00:31:00,399 region of the black hole 664 00:31:00,399 --> 00:31:03,840 the event horizon is where space itself 665 00:31:03,840 --> 00:31:05,200 flows relentlessly 666 00:31:05,200 --> 00:31:07,360 in 667 00:31:09,360 --> 00:31:12,559 what does one mean by space falling 668 00:31:12,559 --> 00:31:15,120 or doing anything it's just that if you 669 00:31:15,120 --> 00:31:16,559 put objects 670 00:31:16,559 --> 00:31:20,000 in space then they will move in certain 671 00:31:20,000 --> 00:31:20,880 ways 672 00:31:20,880 --> 00:31:23,600 and if you put objects near a black hole 673 00:31:23,600 --> 00:31:24,240 as they 674 00:31:24,240 --> 00:31:27,360 approach the horizon inevitably they 675 00:31:27,360 --> 00:31:29,600 must approach the speed of light 676 00:31:29,600 --> 00:31:31,440 in order to stay at rest otherwise 677 00:31:31,440 --> 00:31:35,200 they're going to fall inside the horizon 678 00:31:38,159 --> 00:31:40,399 if the black hole is spinning the 679 00:31:40,399 --> 00:31:42,320 central region is bounded by what's 680 00:31:42,320 --> 00:31:47,840 known as the inner horizon 681 00:31:48,000 --> 00:31:50,559 in a case defined only by einstein's 682 00:31:50,559 --> 00:31:51,840 equations 683 00:31:51,840 --> 00:31:54,720 an object may whip around so fast it 684 00:31:54,720 --> 00:31:57,440 gets flung outward 685 00:31:57,440 --> 00:32:00,240 if there's nothing inside the black hole 686 00:32:00,240 --> 00:32:02,720 except the space-time structure itself 687 00:32:02,720 --> 00:32:04,880 there's nothing inconsistent about 688 00:32:04,880 --> 00:32:05,919 having space 689 00:32:05,919 --> 00:32:07,919 fall inside turn back around and come 690 00:32:07,919 --> 00:32:10,159 back out again because space has no 691 00:32:10,159 --> 00:32:11,440 substance so there's no 692 00:32:11,440 --> 00:32:15,840 problem with it moving through itself 693 00:32:17,919 --> 00:32:20,080 it would be like a river racing over the 694 00:32:20,080 --> 00:32:21,039 falls 695 00:32:21,039 --> 00:32:23,600 hitting the rocks below then flowing 696 00:32:23,600 --> 00:32:26,080 back up 697 00:32:27,440 --> 00:32:29,440 in the strange world of general 698 00:32:29,440 --> 00:32:31,279 relativity you've fallen through a 699 00:32:31,279 --> 00:32:31,840 region 700 00:32:31,840 --> 00:32:33,679 a black hole region where space was 701 00:32:33,679 --> 00:32:35,360 falling faster than light 702 00:32:35,360 --> 00:32:37,600 and now space has turned around and is 703 00:32:37,600 --> 00:32:40,840 now pushing you outward faster than 704 00:32:40,840 --> 00:32:42,799 light 705 00:32:42,799 --> 00:32:45,519 imagine charting a starships course into 706 00:32:45,519 --> 00:32:45,840 this 707 00:32:45,840 --> 00:32:49,120 topsy-turvy realm 708 00:32:51,760 --> 00:32:53,760 if you survived the fall down to the 709 00:32:53,760 --> 00:32:55,200 event horizon 710 00:32:55,200 --> 00:32:58,640 you'd accelerate through it 711 00:33:01,200 --> 00:33:03,519 you go with the flow you hit the speed 712 00:33:03,519 --> 00:33:05,519 of light at the horizon 713 00:33:05,519 --> 00:33:07,919 now you can still see stuff from the 714 00:33:07,919 --> 00:33:09,120 outside world 715 00:33:09,120 --> 00:33:12,000 even when you're inside the horizon but 716 00:33:12,000 --> 00:33:14,240 people can't see you because space is 717 00:33:14,240 --> 00:33:17,679 falling faster than light 718 00:33:19,120 --> 00:33:22,080 to understand the chaotic region within 719 00:33:22,080 --> 00:33:23,360 hamilton has enlisted 720 00:33:23,360 --> 00:33:26,080 einstein's equations in a project to 721 00:33:26,080 --> 00:33:28,159 visualize the black hole's 722 00:33:28,159 --> 00:33:31,120 inner anatomy 723 00:33:31,130 --> 00:33:33,279 [Music] 724 00:33:33,279 --> 00:33:35,200 you could only get this close on a 725 00:33:35,200 --> 00:33:36,640 spaceship propelled by 726 00:33:36,640 --> 00:33:39,840 pure mathematics 727 00:33:41,519 --> 00:33:43,840 passing through the event horizon we 728 00:33:43,840 --> 00:33:47,279 approach the central zone 729 00:33:48,399 --> 00:33:51,120 as we whip around we are flung out of a 730 00:33:51,120 --> 00:33:53,039 kind of cosmic tunnel 731 00:33:53,039 --> 00:33:56,320 known as a wormhole 732 00:33:59,679 --> 00:34:02,320 at its end we pass through what's known 733 00:34:02,320 --> 00:34:04,080 as a white hole 734 00:34:04,080 --> 00:34:06,159 like characters in a science fiction 735 00:34:06,159 --> 00:34:09,280 story we exit into another time 736 00:34:09,280 --> 00:34:14,000 or place perhaps another universe 737 00:34:14,960 --> 00:34:17,520 this strange passage is the work of 738 00:34:17,520 --> 00:34:18,560 theory 739 00:34:18,560 --> 00:34:21,359 in reality it couldn't form amid all the 740 00:34:21,359 --> 00:34:23,280 turbulence 741 00:34:23,280 --> 00:34:26,079 the moment you introduce any real matter 742 00:34:26,079 --> 00:34:27,040 then 743 00:34:27,040 --> 00:34:29,040 the stuff that's trying to fall in tends 744 00:34:29,040 --> 00:34:30,639 to collide with the stuff that's coming 745 00:34:30,639 --> 00:34:32,879 back out again 746 00:34:32,879 --> 00:34:36,639 there's a turbulent chaotic milestone 747 00:34:36,639 --> 00:34:40,159 deep down inside the black hole 748 00:34:43,119 --> 00:34:46,399 in a waterfall this collision zone 749 00:34:46,399 --> 00:34:49,040 is where water crashes on the rocks and 750 00:34:49,040 --> 00:34:53,040 ricochets into the downward flow 751 00:34:54,000 --> 00:34:57,200 here turbulence rises all order 752 00:34:57,200 --> 00:35:00,078 disappears 753 00:35:01,119 --> 00:35:03,920 in a black hole the collision zone is 754 00:35:03,920 --> 00:35:05,520 the inner horizon 755 00:35:05,520 --> 00:35:07,680 where swirling matter envelops the 756 00:35:07,680 --> 00:35:09,320 central core 757 00:35:09,320 --> 00:35:13,760 [Music] 758 00:35:15,119 --> 00:35:17,040 that's the end of the line for a 759 00:35:17,040 --> 00:35:18,240 starship 760 00:35:18,240 --> 00:35:22,399 it gets instantly vaporized 761 00:35:23,680 --> 00:35:25,520 the chief characteristic of this region 762 00:35:25,520 --> 00:35:27,119 near the inner horizon 763 00:35:27,119 --> 00:35:29,599 is that streams of energy are passing 764 00:35:29,599 --> 00:35:31,359 through each other 765 00:35:31,359 --> 00:35:32,800 and they're passing through each other 766 00:35:32,800 --> 00:35:35,440 very rapidly 767 00:35:35,440 --> 00:35:38,480 that counter-streaming of material 768 00:35:38,480 --> 00:35:40,720 begins to build up to the point where 769 00:35:40,720 --> 00:35:41,520 itself 770 00:35:41,520 --> 00:35:45,040 gravitates and that gravity 771 00:35:45,040 --> 00:35:47,839 accelerates those streams even faster 772 00:35:47,839 --> 00:35:50,720 through each other 773 00:35:54,560 --> 00:35:57,440 in the gentle world we know the energy 774 00:35:57,440 --> 00:35:58,800 released by gravity 775 00:35:58,800 --> 00:36:03,040 quickly dissipates whatever crashes down 776 00:36:03,040 --> 00:36:06,720 settles into a state of rest 777 00:36:09,760 --> 00:36:12,880 inside a black hole the energy does not 778 00:36:12,880 --> 00:36:13,920 dissipate 779 00:36:13,920 --> 00:36:17,040 instead it builds on itself rising to an 780 00:36:17,040 --> 00:36:18,400 extreme state 781 00:36:18,400 --> 00:36:20,490 known as the planck density 782 00:36:20,490 --> 00:36:23,119 [Music] 783 00:36:23,119 --> 00:36:26,480 to grasp what that is imagine taking all 784 00:36:26,480 --> 00:36:28,079 the matter we can see with our 785 00:36:28,079 --> 00:36:29,440 telescopes 786 00:36:29,440 --> 00:36:31,520 all the trillions upon trillions of 787 00:36:31,520 --> 00:36:33,040 stars that make up 788 00:36:33,040 --> 00:36:35,920 all the galaxies in the universe and 789 00:36:35,920 --> 00:36:36,960 crush it 790 00:36:36,960 --> 00:36:39,839 down to the size of a marble no don't 791 00:36:39,839 --> 00:36:40,560 stop there 792 00:36:40,560 --> 00:36:43,200 keep going crush it all the way down to 793 00:36:43,200 --> 00:36:45,040 less than the size of an atom 794 00:36:45,040 --> 00:36:48,240 that is a plank density and that's 795 00:36:48,240 --> 00:36:50,720 the kind of density that is produced 796 00:36:50,720 --> 00:36:51,440 inside 797 00:36:51,440 --> 00:36:54,560 a black hole it's the most extreme 798 00:36:54,560 --> 00:36:57,280 place in our universe outside the big 799 00:36:57,280 --> 00:36:59,599 bang 800 00:37:01,920 --> 00:37:04,560 in this state temperatures rise to a 801 00:37:04,560 --> 00:37:06,880 trillion trillion times hotter 802 00:37:06,880 --> 00:37:10,400 than the center of our sun 803 00:37:10,700 --> 00:37:14,000 [Music] 804 00:37:14,000 --> 00:37:16,079 it would be hard to imagine what 805 00:37:16,079 --> 00:37:17,040 destructive 806 00:37:17,040 --> 00:37:19,440 impact the release of this energy would 807 00:37:19,440 --> 00:37:20,720 have 808 00:37:20,720 --> 00:37:23,760 fortunately extreme gravity holds it 809 00:37:23,760 --> 00:37:25,760 tight within the black hole's event 810 00:37:25,760 --> 00:37:28,320 horizon 811 00:37:30,160 --> 00:37:33,200 despite the roiling turmoil within the 812 00:37:33,200 --> 00:37:36,160 supermassive black hole in our galaxy 813 00:37:36,160 --> 00:37:40,078 is thought to be relatively quiet 814 00:37:40,800 --> 00:37:43,359 has it settled into retirement or will 815 00:37:43,359 --> 00:37:45,440 the energy of whirling space 816 00:37:45,440 --> 00:37:48,079 close to its event horizon somehow be 817 00:37:48,079 --> 00:37:49,359 unleashed 818 00:37:49,359 --> 00:37:52,320 astronomers believe that turbulent times 819 00:37:52,320 --> 00:37:53,720 lie ahead 820 00:37:53,720 --> 00:37:55,520 [Music] 821 00:37:55,520 --> 00:37:58,480 the andromeda galaxy is located two and 822 00:37:58,480 --> 00:38:00,160 a half million light years 823 00:38:00,160 --> 00:38:05,440 from our milky way 824 00:38:05,440 --> 00:38:07,440 scientists calculate that it's barreling 825 00:38:07,440 --> 00:38:09,599 toward us at over 200 826 00:38:09,599 --> 00:38:19,200 000 miles per hour 827 00:38:19,200 --> 00:38:21,680 it will take around 5 billion years to 828 00:38:21,680 --> 00:38:23,119 reach us 829 00:38:23,119 --> 00:38:25,440 by that time the sun will have entered 830 00:38:25,440 --> 00:38:27,200 its twilight years 831 00:38:27,200 --> 00:38:29,520 swelling to an enormous size and 832 00:38:29,520 --> 00:38:33,280 scorching the earth 833 00:38:33,280 --> 00:38:36,320 but a much larger galactic catastrophe 834 00:38:36,320 --> 00:38:40,079 is about to unfold a simulation of the 835 00:38:40,079 --> 00:38:42,400 andromeda milky way collision 836 00:38:42,400 --> 00:38:45,599 shows the likely chain of events 837 00:38:45,599 --> 00:38:47,839 at first the two pass in a close 838 00:38:47,839 --> 00:38:49,040 encounter 839 00:38:49,040 --> 00:38:51,200 their mutual gravity tears them both 840 00:38:51,200 --> 00:38:53,598 apart 841 00:38:53,839 --> 00:38:55,920 scientists say the odds are that our 842 00:38:55,920 --> 00:38:56,960 solar system 843 00:38:56,960 --> 00:38:59,200 will get flung out to the far edges of 844 00:38:59,200 --> 00:39:01,839 this maelstrom 845 00:39:04,160 --> 00:39:07,359 [Music] 846 00:39:07,359 --> 00:39:10,480 as the galaxies finally settle together 847 00:39:10,480 --> 00:39:13,200 two hungry supermassive black holes in 848 00:39:13,200 --> 00:39:14,400 their centers 849 00:39:14,400 --> 00:39:17,839 spiral toward each other from all the 850 00:39:17,839 --> 00:39:18,800 turmoil 851 00:39:18,800 --> 00:39:23,760 a new larger black hole will then emerge 852 00:39:25,200 --> 00:39:27,440 who knows whether we will be around to 853 00:39:27,440 --> 00:39:29,599 witness its birth 854 00:39:29,599 --> 00:39:31,839 as astronomers project the continued 855 00:39:31,839 --> 00:39:33,920 evolution of our galaxy 856 00:39:33,920 --> 00:39:36,560 they ask will the matter and energy 857 00:39:36,560 --> 00:39:39,280 impounded within its central black hole 858 00:39:39,280 --> 00:39:42,880 remain there forever 859 00:39:42,880 --> 00:39:45,280 or is the black hole like all other 860 00:39:45,280 --> 00:39:46,800 cosmic bodies 861 00:39:46,800 --> 00:39:57,839 somehow subject to the ravages of time 862 00:40:01,200 --> 00:40:03,520 we live at a time in which most of the 863 00:40:03,520 --> 00:40:05,839 energy of the universe is produced by 864 00:40:05,839 --> 00:40:08,400 stars 865 00:40:08,400 --> 00:40:11,040 trillions of years from now all across 866 00:40:11,040 --> 00:40:12,160 the universe 867 00:40:12,160 --> 00:40:14,880 stars begin to use up their fuel and 868 00:40:14,880 --> 00:40:17,520 fade away 869 00:40:19,100 --> 00:40:21,760 [Music] 870 00:40:21,760 --> 00:40:24,079 the largest stars fall toward the 871 00:40:24,079 --> 00:40:25,680 centers of galaxies 872 00:40:25,680 --> 00:40:27,680 where they're swallowed by supermassive 873 00:40:27,680 --> 00:40:30,480 black holes 874 00:40:34,970 --> 00:40:37,680 [Music] 875 00:40:37,680 --> 00:40:40,800 as the universe decays it gives way to a 876 00:40:40,800 --> 00:40:41,920 long era 877 00:40:41,920 --> 00:40:44,800 dominated by the remnants of dying stars 878 00:40:44,800 --> 00:40:47,200 and black holes 879 00:40:47,200 --> 00:40:49,040 the far future of the universe is one 880 00:40:49,040 --> 00:40:50,640 where the stars have burnt out and 881 00:40:50,640 --> 00:40:51,520 formed 882 00:40:51,520 --> 00:40:53,599 neutron stars or white dwarfs and some 883 00:40:53,599 --> 00:40:55,200 black holes and eventually over long 884 00:40:55,200 --> 00:40:56,880 periods of time the black holes merge 885 00:40:56,880 --> 00:41:00,400 together to form bigger black holes 886 00:41:01,359 --> 00:41:03,359 in time much of the matter within 887 00:41:03,359 --> 00:41:04,400 galaxies 888 00:41:04,400 --> 00:41:07,200 will fall into these black holes and 889 00:41:07,200 --> 00:41:09,440 they will become the last bastions of 890 00:41:09,440 --> 00:41:11,599 our universe 891 00:41:11,599 --> 00:41:15,040 how long will they last the answer may 892 00:41:15,040 --> 00:41:16,880 come from a theory proposed by the 893 00:41:16,880 --> 00:41:18,079 cosmologist 894 00:41:18,079 --> 00:41:21,599 stephen hawking stephen hawking applied 895 00:41:21,599 --> 00:41:22,880 quantum physics to 896 00:41:22,880 --> 00:41:25,599 black holes and predicted that they 897 00:41:25,599 --> 00:41:26,160 wouldn't be 898 00:41:26,160 --> 00:41:28,160 black but would glow with heat radiation 899 00:41:28,160 --> 00:41:29,839 in a very distinctive way 900 00:41:29,839 --> 00:41:32,560 and of course if there's heat coming off 901 00:41:32,560 --> 00:41:34,079 heat energy coming off this energy 902 00:41:34,079 --> 00:41:37,119 has to come from somewhere 903 00:41:38,800 --> 00:41:41,440 the energy hawking said would come from 904 00:41:41,440 --> 00:41:42,880 tiny particles 905 00:41:42,880 --> 00:41:45,520 emerging from the vacuum of space just 906 00:41:45,520 --> 00:41:48,790 outside the event horizon 907 00:41:48,790 --> 00:41:52,730 [Music] 908 00:41:54,560 --> 00:41:57,359 some of those particles radiate away 909 00:41:57,359 --> 00:41:59,440 taking minute amounts of mass 910 00:41:59,440 --> 00:42:01,839 from the black hole like water 911 00:42:01,839 --> 00:42:05,200 evaporating from the ocean 912 00:42:05,440 --> 00:42:08,000 over time the radiation grows stronger 913 00:42:08,000 --> 00:42:09,280 and stronger 914 00:42:09,280 --> 00:42:13,150 as the black hole shrinks and finally 915 00:42:13,150 --> 00:42:14,839 [Music] 916 00:42:14,839 --> 00:42:16,000 explodes 917 00:42:16,000 --> 00:42:19,280 when the last black hole dies that's the 918 00:42:19,280 --> 00:42:22,240 end of the universe as we know it 919 00:42:22,240 --> 00:42:24,640 how can we know if the theory is right 920 00:42:24,640 --> 00:42:26,960 and they actually do decay 921 00:42:26,960 --> 00:42:29,680 if black holes were made in the big bang 922 00:42:29,680 --> 00:42:30,400 with a mass 923 00:42:30,400 --> 00:42:33,119 of about that of mount everest these 924 00:42:33,119 --> 00:42:34,800 black holes ought to be going pop 925 00:42:34,800 --> 00:42:37,040 about now and radio astronomers have 926 00:42:37,040 --> 00:42:38,319 looked to see if they can see 927 00:42:38,319 --> 00:42:40,160 a sort of electromagnetic pulse 928 00:42:40,160 --> 00:42:42,839 associated with that they haven't found 929 00:42:42,839 --> 00:42:45,839 any 930 00:42:46,560 --> 00:42:48,960 there might be other ways to see a black 931 00:42:48,960 --> 00:42:50,560 hole decay 932 00:42:50,560 --> 00:42:53,599 from all across space black hole jets 933 00:42:53,599 --> 00:42:55,280 are blasting particles out 934 00:42:55,280 --> 00:42:59,839 at very near the speed of light 935 00:43:03,680 --> 00:43:06,880 these particles called cosmic rays slam 936 00:43:06,880 --> 00:43:08,880 into our earth's atmosphere with enough 937 00:43:08,880 --> 00:43:09,599 energy 938 00:43:09,599 --> 00:43:13,200 to create miniature black holes 939 00:43:13,200 --> 00:43:15,280 these mini monsters would decay 940 00:43:15,280 --> 00:43:16,240 immediately 941 00:43:16,240 --> 00:43:18,880 in a shower of particles but they are 942 00:43:18,880 --> 00:43:20,960 very difficult to observe 943 00:43:20,960 --> 00:43:23,440 we're almost to store the emittances 944 00:43:23,440 --> 00:43:24,880 look good 945 00:43:24,880 --> 00:43:26,720 what if you could produce collisions 946 00:43:26,720 --> 00:43:27,920 this powerful 947 00:43:27,920 --> 00:43:30,319 in an earth-bound lab and under 948 00:43:30,319 --> 00:43:31,920 controlled conditions 949 00:43:31,920 --> 00:43:35,520 actually create a black hole 950 00:43:35,520 --> 00:43:38,079 if you could then watch a decay it would 951 00:43:38,079 --> 00:43:40,800 provide a unique window onto the future 952 00:43:40,800 --> 00:43:42,400 of black holes 953 00:43:42,400 --> 00:43:44,720 filling glue so we'll start collimating 954 00:43:44,720 --> 00:43:46,400 a blue ring 955 00:43:46,400 --> 00:43:48,160 it's hoped that taking two very high 956 00:43:48,160 --> 00:43:50,079 energy small pieces of a very fast 957 00:43:50,079 --> 00:43:50,960 proton 958 00:43:50,960 --> 00:43:52,560 and colliding with each other you can 959 00:43:52,560 --> 00:43:54,880 put enough energy into a small enough 960 00:43:54,880 --> 00:43:55,599 space 961 00:43:55,599 --> 00:43:56,880 that you can actually create the 962 00:43:56,880 --> 00:43:59,119 conditions by which a black hole would 963 00:43:59,119 --> 00:44:00,079 form 964 00:44:00,079 --> 00:44:01,280 these black holes are supposed to be 965 00:44:01,280 --> 00:44:03,119 very small therefore very hot 966 00:44:03,119 --> 00:44:04,640 and therefore they essentially radiate 967 00:44:04,640 --> 00:44:08,480 themselves away immediately 968 00:44:08,480 --> 00:44:10,160 one point two one point three ten of the 969 00:44:10,160 --> 00:44:12,640 nine bbq is still locked feedback looks 970 00:44:12,640 --> 00:44:13,040 good 971 00:44:13,040 --> 00:44:16,480 all right here we go at brookhaven 972 00:44:16,480 --> 00:44:18,960 national lab in new york state 973 00:44:18,960 --> 00:44:22,079 physicists are using advanced technology 974 00:44:22,079 --> 00:44:24,400 to blast gold atoms in opposite 975 00:44:24,400 --> 00:44:25,359 directions 976 00:44:25,359 --> 00:44:28,240 down giant tunnels almost two and a half 977 00:44:28,240 --> 00:44:29,920 miles long 978 00:44:29,920 --> 00:44:32,000 they accelerate these atoms to within a 979 00:44:32,000 --> 00:44:33,200 tiny fraction 980 00:44:33,200 --> 00:44:37,839 of the speed of light 981 00:44:41,920 --> 00:44:47,040 when the atoms collide a fireball erupts 982 00:44:48,000 --> 00:44:50,640 sophisticated sensors record a splatter 983 00:44:50,640 --> 00:44:52,720 of subatomic particles 984 00:44:52,720 --> 00:44:57,520 a hot soup of gluons and quarks 985 00:44:58,560 --> 00:45:00,319 what we believe we're creating is a 986 00:45:00,319 --> 00:45:02,000 temperatures approaching 2 trillion 987 00:45:02,000 --> 00:45:03,040 degrees centigrade 988 00:45:03,040 --> 00:45:05,119 that's a hundred thousand times hotter 989 00:45:05,119 --> 00:45:08,160 than the interior of the sun 990 00:45:08,160 --> 00:45:10,960 it's hotter than a supernova explosion 991 00:45:10,960 --> 00:45:12,480 it's harder than the surface of a black 992 00:45:12,480 --> 00:45:13,040 hole 993 00:45:13,040 --> 00:45:15,200 it's harder than a neutron star in fact 994 00:45:15,200 --> 00:45:16,880 we believe nowhere in the universe is at 995 00:45:16,880 --> 00:45:18,640 that temperature it was last that 996 00:45:18,640 --> 00:45:19,839 temperature in the universe one 997 00:45:19,839 --> 00:45:21,680 microsecond one millionth of a second 998 00:45:21,680 --> 00:45:24,480 after the big bang 999 00:45:27,119 --> 00:45:29,200 it's as if they are running the universe 1000 00:45:29,200 --> 00:45:30,480 in reverse 1001 00:45:30,480 --> 00:45:32,880 taking us back to an instant when it was 1002 00:45:32,880 --> 00:45:34,079 extremely hot 1003 00:45:34,079 --> 00:45:36,640 and dense 1004 00:45:37,839 --> 00:45:40,560 creating a black hole it seems will take 1005 00:45:40,560 --> 00:45:43,839 even more energy than that 1006 00:45:43,839 --> 00:45:45,839 in fact more than any earthbound 1007 00:45:45,839 --> 00:45:48,960 collider can pack 1008 00:45:51,520 --> 00:45:54,000 that is unless there's more to our 1009 00:45:54,000 --> 00:45:54,800 universe 1010 00:45:54,800 --> 00:45:58,240 and to gravity than we've thought 1011 00:45:58,240 --> 00:46:00,400 our injection efficiency looks good the 1012 00:46:00,400 --> 00:46:02,720 orbit looks good orbit rms is under two 1013 00:46:02,720 --> 00:46:05,280 millimeters in each plane 1014 00:46:05,280 --> 00:46:07,440 einstein's theory of general relativity 1015 00:46:07,440 --> 00:46:09,119 is the one that we find in all the 1016 00:46:09,119 --> 00:46:10,880 textbooks and it's the one that we all 1017 00:46:10,880 --> 00:46:12,480 sort of pledged to defend 1018 00:46:12,480 --> 00:46:14,720 but would be rash to say it's the last 1019 00:46:14,720 --> 00:46:17,119 word on the subject of gravitation 1020 00:46:17,119 --> 00:46:18,640 and there are certainly alternative 1021 00:46:18,640 --> 00:46:20,079 theories around and some of them are 1022 00:46:20,079 --> 00:46:21,119 quite popular 1023 00:46:21,119 --> 00:46:22,800 and some of these theories these are 1024 00:46:22,800 --> 00:46:25,119 non-standard theories of gravitation 1025 00:46:25,119 --> 00:46:28,560 predict that you could make a black hole 1026 00:46:28,560 --> 00:46:29,920 by colliding together 1027 00:46:29,920 --> 00:46:31,200 subatomic particles 1028 00:46:31,200 --> 00:46:33,440 [Music] 1029 00:46:33,440 --> 00:46:35,520 some scientists believe they may be able 1030 00:46:35,520 --> 00:46:36,800 to create one 1031 00:46:36,800 --> 00:46:39,040 at a new and more powerful system in 1032 00:46:39,040 --> 00:46:40,000 europe 1033 00:46:40,000 --> 00:46:42,860 called the large hadron collider 1034 00:46:42,860 --> 00:46:45,959 [Music] 1035 00:46:46,160 --> 00:46:48,480 the key lies in whether the world we 1036 00:46:48,480 --> 00:46:49,280 know 1037 00:46:49,280 --> 00:46:52,800 is part of a more complex cosmic reality 1038 00:46:52,800 --> 00:46:55,599 beyond the three spatial dimensions plus 1039 00:46:55,599 --> 00:46:56,319 time 1040 00:46:56,319 --> 00:47:01,200 that we experience in our everyday lives 1041 00:47:04,000 --> 00:47:06,960 if so we would be like insects living on 1042 00:47:06,960 --> 00:47:09,520 the two-dimensional surface of a pond 1043 00:47:09,520 --> 00:47:12,400 unaware of the deep and complex reality 1044 00:47:12,400 --> 00:47:14,240 below it 1045 00:47:14,240 --> 00:47:16,720 that we can be living on the surface of 1046 00:47:16,720 --> 00:47:17,359 the pond 1047 00:47:17,359 --> 00:47:20,000 happily minding our own business but not 1048 00:47:20,000 --> 00:47:21,119 realizing that under 1049 00:47:21,119 --> 00:47:22,640 underwater something say a fish 1050 00:47:22,640 --> 00:47:24,160 underwater can be swimming swimming 1051 00:47:24,160 --> 00:47:26,400 through the water causing disturbances 1052 00:47:26,400 --> 00:47:28,160 that propagate up to where we are 1053 00:47:28,160 --> 00:47:30,160 we could feel it happening we could 1054 00:47:30,160 --> 00:47:32,000 essentially see our universe around us 1055 00:47:32,000 --> 00:47:32,559 changing 1056 00:47:32,559 --> 00:47:34,000 but we look around for the cause of it 1057 00:47:34,000 --> 00:47:39,839 and we won't know what it is 1058 00:47:43,040 --> 00:47:45,119 the idea is that a number of extra 1059 00:47:45,119 --> 00:47:46,240 dimensions 1060 00:47:46,240 --> 00:47:50,000 actually intersect our world 1061 00:47:50,000 --> 00:47:54,240 10 12 pi okay when particles collide at 1062 00:47:54,240 --> 00:47:55,839 very high energies 1063 00:47:55,839 --> 00:47:57,920 those extra dimensions enhance the 1064 00:47:57,920 --> 00:47:59,520 gravitational force 1065 00:47:59,520 --> 00:48:02,480 between the particles enough to create a 1066 00:48:02,480 --> 00:48:03,040 micro 1067 00:48:03,040 --> 00:48:07,119 black hole 1068 00:48:07,119 --> 00:48:09,280 the scientists will know a black hole is 1069 00:48:09,280 --> 00:48:11,280 there when they see the shower of 1070 00:48:11,280 --> 00:48:12,079 particles 1071 00:48:12,079 --> 00:48:15,440 predicted by hawking's theory 1072 00:48:15,440 --> 00:48:18,000 and for a moment that will open a window 1073 00:48:18,000 --> 00:48:18,880 to a deeper 1074 00:48:18,880 --> 00:48:21,839 cosmic reality 1075 00:48:22,079 --> 00:48:24,240 the very idea that we could tap into 1076 00:48:24,240 --> 00:48:26,079 this underlying realm 1077 00:48:26,079 --> 00:48:28,559 shows how rich black hole research has 1078 00:48:28,559 --> 00:48:30,960 become 1079 00:48:32,960 --> 00:48:35,920 einstein's theory showed how black holes 1080 00:48:35,920 --> 00:48:37,280 can generate extreme 1081 00:48:37,280 --> 00:48:39,920 energies cause the universe to wobble 1082 00:48:39,920 --> 00:48:40,960 and bend 1083 00:48:40,960 --> 00:48:44,400 and twist up into knots 1084 00:48:46,960 --> 00:48:49,839 the recognition that black holes are 1085 00:48:49,839 --> 00:48:51,680 fundamental to the workings of our 1086 00:48:51,680 --> 00:48:52,720 universe 1087 00:48:52,720 --> 00:48:55,520 is a major discovery of science in our 1088 00:48:55,520 --> 00:48:57,839 time 1089 00:49:00,480 --> 00:49:02,640 and if it turns out that they do have a 1090 00:49:02,640 --> 00:49:04,559 finite lifetime 1091 00:49:04,559 --> 00:49:06,800 their death will signal the end of our 1092 00:49:06,800 --> 00:49:08,720 universe 1093 00:49:08,720 --> 00:49:11,520 by some estimates the time horizon of 1094 00:49:11,520 --> 00:49:13,520 the largest black holes 1095 00:49:13,520 --> 00:49:17,119 goes out to a google years take a 1 1096 00:49:17,119 --> 00:49:21,520 and add 100 zeros to it 1097 00:49:22,480 --> 00:49:25,280 that's an unfathomable spread of time 1098 00:49:25,280 --> 00:49:26,160 but it's far 1099 00:49:26,160 --> 00:49:29,920 short of forever the clock may well be 1100 00:49:29,920 --> 00:49:30,480 ticking 1101 00:49:30,480 --> 00:49:35,200 on our universe the alarm will sound 1102 00:49:35,200 --> 00:49:45,839 when the last black hole explodes 1103 00:49:56,510 --> 00:49:59,709 [Music] 1104 00:50:00,000 --> 00:50:02,079 you 73933

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