1 00:00:02,687 --> 00:00:08,237 We saw the movie, a huge asteroid headed towards the ground 2 00:00:08,437 --> 00:00:13,294 Collides with the atmosphere and hits the surface 3 00:00:14,373 --> 00:00:20,618 To send a huge fireball, and a lethal shock wave 4 00:00:22,109 --> 00:00:26,075 The earth groaned and grew 5 00:00:26,995 --> 00:00:36,283 But this is not one of those films It's about how to repel the earth and its humans 6 00:00:37,242 --> 00:00:41,366 To end the disaster of the end 7 00:00:49,683 --> 00:00:57,463 Ways of working the universe 8 00:01:01,888 --> 00:01:04,364 Planet Earth 9 00:01:04,564 --> 00:01:09,365 The cradle of life, floating gracefully through space 10 00:01:09,565 --> 00:01:11,278 Or so we believe 11 00:01:11,478 --> 00:01:17,495 Our planet may be the harshest part of the universe 12 00:01:18,392 --> 00:01:22,362 Think about the natural disasters that have happened to mankind 13 00:01:22,562 --> 00:01:26,525 Earthquakes, volcanoes, hurricanes and the like 15th 00:01:26,725 --> 00:01:28,504 We can not stop it 14 00:01:28,704 --> 00:01:36,335 But the asteroid, that's a disaster A huge natural we can prevent 15 00:01:36,535 --> 00:01:42,540 When people hear the word asteroid, the first thing they can think about Those fantasy films about the dangerous asteroids that hit us 16 00:01:42,540 --> 00:01:45,359 The story of the extinction of dinosaurs 17 00:01:45,359 --> 00:01:48,881 Of course there are some dangerous asteroids 18 00:01:48,881 --> 00:01:56,636 When it comes to searching for asteroids And defending the earth, the scientists are the heroes strongly 19 00:01:56,836 --> 00:02:05,094 Across the world, Hama teams are looking Planet on ways to prevent disaster 20 00:02:05,094 --> 00:02:08,576 ... sweep the sky 21 00:02:08,576 --> 00:02:11,574 They do accounts 22 00:02:11,574 --> 00:02:14,780 ... design technology 23 00:02:14,780 --> 00:02:25,820 They make plans to confirm that extinction The planet of space is nothing more than a science fiction 24 00:02:27,151 --> 00:02:31,482 If you want to face a discount You need to know a lot about him to defeat him 25 00:02:31,682 --> 00:02:41,206 Its size, its strength, its composition, and how it moves Know the same about asteroids if we want to defeat them 26 00:02:44,820 --> 00:02:46,964 To better understand this discount 27 00:02:46,964 --> 00:02:52,995 Cathy Plesco of the Los Lab National Alamos travel to Arizona 28 00:02:52,995 --> 00:03:04,583 Fifty thousand years ago, this was a point Collision behind a nozzle at a depth of 550 feet 29 00:03:06,137 --> 00:03:09,530 This meteorite nozzle 30 00:03:12,542 --> 00:03:22,955 It's amazing to stand on the edge of a nozzle Like this, I see the magnitude of something so great 31 00:03:22,955 --> 00:03:35,320 I feel small and try to understand the amount of energy Necessary to cut that huge amount of rock 32 00:03:38,935 --> 00:03:45,975 The meteor that blew the nozzle hit a hydrogen bomb 33 00:03:46,175 --> 00:03:51,884 But the rock was space Only thirty feet wide 34 00:03:53,221 --> 00:04:03,478 The meteor nozzle helps to understand how you do Speed converts a small shell into a killer 35 00:04:03,678 --> 00:04:08,711 The asteroid came at 27,000 miles an hour 36 00:04:08,911 --> 00:04:15,456 It's ten times faster The shot from the gun 37 00:04:15,656 --> 00:04:20,563 Hit the surface and burst 38 00:04:20,563 --> 00:04:26,433 The blast broke the nozzle 39 00:04:28,043 --> 00:04:37,989 The collision transformed the surrounding hard rock To dust, and sent a huge shock wave out 40 00:04:38,189 --> 00:04:43,657 The winds here are stormy but do not compare Shock wave impact 41 00:04:43,857 --> 00:04:52,737 Soon he would see winds approaching thousands Mileage per hour when the shock wave came 42 00:04:54,142 --> 00:05:01,994 Scientists concluded that there A 20% chance of such a crash on Earth every century 43 00:05:01,994 --> 00:05:07,989 If an asteroid had hit us like this today, it would have taken a city 44 00:05:08,189 --> 00:05:13,330 But Keithy's research helps us strengthen our defenses 45 00:05:14,061 --> 00:05:19,829 We believe there are various ways to prevent An asteroid from impact to Earth 46 00:05:19,829 --> 00:05:23,603 My colleagues and I are in "Los Alamos, Livermore and other places 47 00:05:23,603 --> 00:05:29,656 We use computer models on computers Super high precision simulators 48 00:05:29,656 --> 00:05:36,241 To tell us good ideas or not And we can present them to decision-makers 49 00:05:36,241 --> 00:05:42,471 Here's what we might do in comparison With what Bruce Willis could do 50 00:05:45,505 --> 00:05:53,683 The most powerful weapon in our defense arsenal is the nuclear bomb 51 00:05:54,809 --> 00:05:58,332 Exploding an asteroid in that way has its disadvantages 52 00:05:58,532 --> 00:06:04,420 He risks landing the earth with hundreds of smaller meteorites 53 00:06:04,620 --> 00:06:08,967 "But the Kathy team works On plans to avoid that risk 54 00:06:08,967 --> 00:06:14,927 In return, they use weapons To change the course of the asteroid 55 00:06:15,886 --> 00:06:19,227 One thing I'm studying is nuclear drift 56 00:06:19,227 --> 00:06:29,889 In some cases and in the near future may be There is a possibility that we need to repel a huge body on our way 57 00:06:29,889 --> 00:06:36,906 Those things, if they were huge, were lost We need to use a nuclear weapon to do that 58 00:06:37,106 --> 00:06:46,405 We might launch a nuclear weapon and detonate it Above the surface of the body to change its speed slightly 59 00:06:46,405 --> 00:06:55,387 Exploding a nuclear weapon near an asteroid A part of its surface evaporates and its path changes 60 00:06:58,533 --> 00:07:05,201 But the bombing of a nuclear weapon in space is not the first option 61 00:07:05,201 --> 00:07:07,091 There are some advantages and disadvantages of using nuclear deflection 62 00:07:07,091 --> 00:07:14,119 There are some situations where those are Appropriate technology is the only option at the time 63 00:07:14,319 --> 00:07:26,726 But we hope the future will have other means At our disposal is not difficult diplomatically or politically 64 00:07:26,926 --> 00:07:36,373 Scientists race to find a way to change course Asteroid without the use of nuclear weapons 65 00:07:37,724 --> 00:07:40,949 We discover more and more about asteroids and understand them 66 00:07:40,949 --> 00:07:46,452 We recognize the existence of ways to mitigate the The destructive effects of their impact on the ground 67 00:07:46,652 --> 00:07:53,662 This may be the most important attempt Scientific research carried out by humans 68 00:07:53,862 --> 00:08:04,591 The best way to stop the asteroid disaster To get rid of them before they become a threat 69 00:08:18,103 --> 00:08:22,404 Our solar system is dangerous 70 00:08:23,559 --> 00:08:27,857 Quick asteroids rush through space 71 00:08:29,788 --> 00:08:34,209 And many of those rocks are blocking our way 72 00:08:34,951 --> 00:08:41,949 To resist asteroid threat Scientists plot battle plans 73 00:08:46,286 --> 00:08:53,022 The first step to understanding this danger His prevention is to look for 74 00:08:53,022 --> 00:08:59,029 , Is not the great that may destroy our civilization But small that may destroy your city 75 00:09:05,280 --> 00:09:09,662 At the top of the mountains in "Catalina to clear the sky" in "Arizona" 76 00:09:09,862 --> 00:09:14,969 The asteroid hunter Craig Leonard "led research Games 00:09:15,169 --> 00:09:21,976 We guard the world that night With this telescope at the top of this mountain 77 00:09:22,176 --> 00:09:29,483 Comparing four pictures of the same patch of sky Which were picked up for twenty minutes 78 00:09:29,683 --> 00:09:35,230 Craig can track asteroids Hidden hidden between the stars 79 00:09:35,430 --> 00:09:42,792 Because in those pictures do not The stars move, but the asteroids 80 00:09:42,792 --> 00:09:51,830 If he were a bright asteroid we would see points Shiny light moves through the four images 81 00:09:55,749 --> 00:10:03,133 You should try a lot before finding One of them, this is the night situation as a whole night 82 00:10:04,849 --> 00:10:09,565 Here we are, it is a real object 83 00:10:09,565 --> 00:10:14,766 You can see it moving through the sky Here from the bottom right to the top left 84 00:10:14,766 --> 00:10:24,064 I'm thrilled to discover an asteroid tonight Because it is an object that approaches very much in the vicinity of the earth 85 00:10:24,264 --> 00:10:34,518 Craig's research reveals that this is a 100-percent asteroid A foot may be approaching 630,000 miles from Earth 86 00:10:34,718 --> 00:10:38,775 This is less than three times the distance to the moon 87 00:10:38,975 --> 00:10:48,712 In the future, this orbit may be approaching Asteroid from the ground up to a collision course 88 00:10:48,912 --> 00:10:53,565 If that happens we must prepare for it 89 00:10:54,365 --> 00:11:00,346 Whenever we spotted it earlier in the day We have a better chance of changing course 90 00:11:00,346 --> 00:11:02,672 The space is very roomy and the earth is tiny 91 00:11:02,672 --> 00:11:05,417 Even if we spotted the asteroid from afar 92 00:11:05,417 --> 00:11:16,467 We changed its course slightly and poke slightly and corrected The path is slight when it reaches the position of the land of Vetilavana completely 93 00:11:16,667 --> 00:11:22,433 To do this, we change the asteroids off track 94 00:11:23,997 --> 00:11:33,168 Imagine the game of golf, changing course The ball with one degree completely loses the target 95 00:11:33,368 --> 00:11:36,955 Measure it on asteroids 96 00:11:37,155 --> 00:11:42,202 Over time, you can leave Asteroids are embedded in the asteroid belt 97 00:11:42,202 --> 00:11:49,815 To become dangerous objects near the ground at a distance Thirty million miles may hit our planet one day 98 00:11:51,025 --> 00:11:58,789 But if the planet's protectors could change The path of the body is dangerous by ten degrees 99 00:11:58,789 --> 00:12:01,344 You will completely avoid the earth 100 00:12:02,616 --> 00:12:08,230 Scientists have devised a direct way to do this 101 00:12:09,786 --> 00:12:15,235 In the game of football, if the defenders saw the back The rear is going towards the finish line, so what are they doing? 102 00:12:15,435 --> 00:12:19,240 They collide with him and push him off the pitch and drop him 103 00:12:19,440 --> 00:12:22,154 This is what we want to do with asteroids 104 00:12:22,354 --> 00:12:27,756 If we send something moving toward the asteroid quickly , Great for colliding with it, we call it locomotive locomotive 105 00:12:27,756 --> 00:12:34,978 He hits him hard, and does not change speed Asteroid, but also its path 106 00:12:38,758 --> 00:12:45,137 Scientists have already intercepted Earth-like objects resembling asteroids 107 00:12:47,011 --> 00:12:48,810 2005 108 00:12:48,810 --> 00:12:56,434 The Deep Impact vehicle arrived at "Temple-1", guilty of the size of half of "Manhattan" 109 00:12:58,859 --> 00:13:04,376 The vehicle launched a probe Small on the comet like the shell 110 00:13:06,260 --> 00:13:15,607 "I ran into" Temple-1 Like a shell to explode material from the surface 111 00:13:15,640 --> 00:13:20,010 The search continues in the motor crashes 112 00:13:20,210 --> 00:13:30,295 "In 2022, a vehicle called DART will collide The asteroid speeds at about 13,000 miles per hour 113 00:13:30,872 --> 00:13:37,512 Transmission of that driving force It will change the speed of the asteroid slightly 114 00:13:37,712 --> 00:13:41,228 Maybe part of the mile per hour 115 00:13:41,428 --> 00:13:52,337 But over the course of a decade, this change in speed, even though I said it will work To change its position significantly enough to avoid the Earth altogether 116 00:13:56,315 --> 00:14:00,948 Collision with a huge space rock Changing its path may seem unusual 117 00:14:02,842 --> 00:14:08,500 But astronomers have found it very much in space 118 00:14:10,669 --> 00:14:16,372 If there was traffic congestion on a highway and lots more From changing the lanes, collisions will occur sooner or later 119 00:14:16,572 --> 00:14:19,355 This happens in our solar system as well 120 00:14:19,555 --> 00:14:21,928 The asteroid belt is very busy 121 00:14:21,928 --> 00:14:30,796 Asteroids hit each other at relative speeds of several Miles per second, and when that happens sparks fly 122 00:14:33,952 --> 00:14:39,433 If we start with two asteroids and collide Suddenly they produce ten asteroids 123 00:14:39,633 --> 00:14:44,041 The ten will collide again to produce a hundred asteroids 124 00:14:44,041 --> 00:14:52,185 These asteroids will hit each other to produce thousands And millions and billions of potential landslides 125 00:14:52,385 --> 00:15:00,648 But that war is not just a game of numbers Because asteroids do not all consist of the same substance 126 00:15:00,648 --> 00:15:07,575 We will need different weapons for each type 127 00:15:24,077 --> 00:15:33,665 Across the world, the protectors develop the planet arts Battles to protect us from a large asteroid collision 128 00:15:35,243 --> 00:15:41,509 But there are millions of asteroids in the system Each of which represents a danger of some kind 129 00:15:41,709 --> 00:15:49,717 Its speed, size and travel is about Earth helps determine the degree of danger 130 00:15:49,917 --> 00:15:57,128 Our words increased our understanding of the asteroid They prepare us better so we can defeat it 131 00:15:57,328 --> 00:15:59,786 It is the issue of knowing the enemy 132 00:15:59,786 --> 00:16:08,913 We need to know something about those properties So that we can keep the danger away from our course 133 00:16:10,965 --> 00:16:17,596 But scientists realize that the installation The asteroid may be the deadliest factor 134 00:16:19,999 --> 00:16:25,766 Knowing the asteroid's structure helps us Looking for weakness in her armor 135 00:16:28,414 --> 00:16:36,379 Marina Prasovic "from the Center for the Study of Artes near" The Earth uses a technique that evolved during World War II 136 00:16:36,379 --> 00:16:38,067 Radar 137 00:16:40,642 --> 00:16:45,799 Planetary radars are much like radar 138 00:16:45,999 --> 00:16:50,739 The airport radar is also tracking Aircraft we are tracking asteroids 139 00:16:50,739 --> 00:16:55,431 Hundreds of thousands away Perhaps millions of kilometers 140 00:16:55,631 --> 00:17:01,236 Radars also tell us Also how does this asteroid look like 141 00:17:01,436 --> 00:17:06,471 We want to know its size, shape and chemical composition 142 00:17:06,901 --> 00:17:10,698 Considering the details we see On the surface and lack of vehicle transmission 143 00:17:10,698 --> 00:17:15,996 This can not be achieved Our space mission 144 00:17:16,196 --> 00:17:26,712 Radar shows that asteroids may be composed Of rocks or minerals or a combination of them 145 00:17:26,912 --> 00:17:32,573 This is important information to calculate how we deal with it 146 00:17:33,811 --> 00:17:39,195 Metal asteroids are much denser Of the usual rock asteroids 147 00:17:39,195 --> 00:17:47,906 Collisions from a large iron asteroid could generate energy Much more than a rocky asteroid just the same size 148 00:17:48,106 --> 00:17:52,892 It also caused the metal shell More damage than a rock of the same size 149 00:17:53,092 --> 00:17:58,687 The asteroids may be mineral More deadly than the rock asteroids 150 00:17:58,887 --> 00:18:08,938 Scientists have now discovered that most asteroids are less similar With metal shells and much like the cosmic shots 151 00:18:09,999 --> 00:18:15,288 Most asteroids are not bodies One compact but clusters of gravel 152 00:18:15,288 --> 00:18:21,572 It consists of many smaller rocks Blocks and granules and parts of the sand 153 00:18:21,572 --> 00:18:25,961 All of them attach gravity to each other without tightening 154 00:18:25,962 --> 00:18:35,459 Asteroid asteroids such as "Itkawa" in the form of a bead The beans may have originated from violent collisions between asteroids 155 00:18:36,303 --> 00:18:42,849 At first, the rocky relics were scattered Of those collisions such as shrapnel 156 00:18:43,049 --> 00:18:48,969 Then the gravity that controls some The rocks bind them together again without tightening 157 00:18:50,935 --> 00:18:58,670 The composition of asteroid asteroids represents A great challenge for the protectors of our planet 158 00:18:59,558 --> 00:19:04,958 How can the champions of science They save us from a heap of stones? 159 00:19:04,958 --> 00:19:14,373 If the body is a solid block of metal it will respond to the collision or The explosion is quite different from if it were piles of gravel 160 00:19:14,373 --> 00:19:17,012 They are linked to each other without gravity 161 00:19:17,212 --> 00:19:22,902 They are very fragile bodies and need special considerations 162 00:19:23,102 --> 00:19:27,433 We can not necessarily collide with them 163 00:19:28,515 --> 00:19:34,573 Collision with asteroid asteroids It is like smashing a pile of leaves 164 00:19:34,773 --> 00:19:39,977 Thousands of smaller rocks will be pushed in every direction 165 00:19:40,177 --> 00:19:46,463 They can not be monitored or predicted and may continue to rush us 166 00:19:47,520 --> 00:19:51,576 But we have a plan 167 00:19:51,776 --> 00:20:00,394 Instead of using brute force We can use a slight gravity lift 168 00:20:00,594 --> 00:20:08,203 Instead of this obnoxious approach to beating him away Just, we need something more careful and more precise 169 00:20:08,203 --> 00:20:11,886 Here is where the gravity locomotive comes 170 00:20:14,416 --> 00:20:18,678 The piles may be rocks Small but attractive 171 00:20:18,678 --> 00:20:25,571 If we send a probe that has a ton mass, for example, it will be It also has an attraction, not great, but it is present 172 00:20:25,571 --> 00:20:36,539 If we approached the asteroid, we could use gravity Mutual, attraction between them, to pull the asteroid into a safe orbit 173 00:20:37,340 --> 00:20:41,298 All we need to stop is a vehicle Next to the asteroid and hover over there 174 00:20:41,298 --> 00:20:45,286 We do not let the gravity of the asteroid and the vehicle entice each other 175 00:20:45,486 --> 00:20:52,013 And let the gravity of the vehicle work As a rope to pull the asteroid out of orbit 176 00:20:53,640 --> 00:21:01,873 That may sound like a science fiction, though That physics is simple and we can do it 177 00:21:04,339 --> 00:21:11,633 But the gravity locomotive works only if We followed the movement of those asteroids accurately 178 00:21:12,930 --> 00:21:20,686 The problem is a giant agent Complex in the middle of our solar system 179 00:21:20,686 --> 00:21:23,229 the sun 180 00:21:40,461 --> 00:21:46,265 Planet protectors want to stop the disaster of the end 181 00:21:48,282 --> 00:21:55,666 Their mission is to protect the land from collisions Asteroids that seem inevitable 182 00:21:57,064 --> 00:22:02,089 But to do so they have to predict all their steps 183 00:22:03,654 --> 00:22:07,952 In a constantly changing solar system, this is not easy 184 00:22:07,999 --> 00:22:14,091 We measure their orbits and we can draw Maps of their orbits as we see them today 185 00:22:14,291 --> 00:22:21,508 , But we know that it is not a fixed group, but a moving one Things change constantly in the asteroid belt 186 00:22:21,999 --> 00:22:32,120 The order of asteroids is not just about size, it is necessary Understand the density, orbit and speed so we deal with it 187 00:22:32,320 --> 00:22:37,206 The collisions may work Asteroid reducts in new orbits 188 00:22:38,965 --> 00:22:47,217 But there is another influential factor, gravity The giant gushing buyer 189 00:22:47,417 --> 00:22:49,804 Jupiter is the largest object in the solar system 190 00:22:50,004 --> 00:22:51,553 And sits outside the asteroid belt 191 00:22:51,753 --> 00:22:56,656 His attractiveness can attract those asteroids And make their orbits more oval 192 00:22:56,856 --> 00:23:00,750 To send them towards the sun passing through the Earth's orbit 193 00:23:00,950 --> 00:23:06,277 Simulate buyer effect on millions Asteroids are very difficult 194 00:23:06,477 --> 00:23:13,362 Now add some effect The biggest crash in the asteroid belt 195 00:23:13,362 --> 00:23:21,126 Three hundred miles of rocks "Such as" Vista "and" Palace 196 00:23:21,326 --> 00:23:26,017 The difficult task becomes almost impossible 197 00:23:30,060 --> 00:23:35,423 But gravity is not by force The only ones that make chaos orbits 198 00:23:35,999 --> 00:23:46,705 This asteroid "Pino", there is a chance In 2700 the earth was shocked 199 00:23:46,905 --> 00:23:50,374 But the Pino orbit is constantly changing 200 00:23:50,574 --> 00:23:56,384 In the last 18 years, sharp He traversed more than a hundred miles 201 00:23:56,584 --> 00:24:00,901 The sun may be the culprit 202 00:24:01,101 --> 00:24:03,478 What can change the orbit of an asteroid? 203 00:24:03,678 --> 00:24:08,605 It's easy to imagine that those huge rocks Some of which are adjacent to some of them attractively 204 00:24:08,805 --> 00:24:13,319 But it has the strongest effect Because of something as slight as sunlight? 205 00:24:13,319 --> 00:24:14,582 Their impact may be very slight 206 00:24:14,782 --> 00:24:18,168 But the sunlight on our bodies makes a slight pressure 207 00:24:18,368 --> 00:24:27,728 The fact that one of your sides is warmer From the other is like a push you may move 208 00:24:27,928 --> 00:24:32,926 Sunlight consists of bundles A small energy called photons 209 00:24:33,126 --> 00:24:40,750 When the photons collide with the asteroid, they are transported Very little driving force and heat 210 00:24:40,950 --> 00:24:44,562 Imagine this situation here 211 00:24:44,762 --> 00:24:45,523 Here is our asteroid 212 00:24:45,723 --> 00:24:49,810 It may actually be offered Ten miles or miles or the like 213 00:24:50,010 --> 00:24:52,010 Here is our asteroid, and here is the sun 214 00:24:52,210 --> 00:24:55,568 The asteroid rotates around the sun that way 215 00:24:55,768 --> 00:24:59,213 This face is heated by Asteroid by heat from the sun 216 00:24:59,413 --> 00:25:04,095 Here is the rear facing face The emptiness of cold space is cooler 217 00:25:04,295 --> 00:25:06,233 I really feel it with my own hands 218 00:25:06,433 --> 00:25:14,366 The warm face that draws the light from the sun restores Distribute that temperature in the infrared spectral segment 219 00:25:14,366 --> 00:25:19,721 All this radiated infrared radiation from The side of the asteroid acts as a rocket engine in some way 220 00:25:19,721 --> 00:25:22,544 He drives the asteroid 221 00:25:23,396 --> 00:25:26,566 This is known for the influence of Yarkovski 222 00:25:26,766 --> 00:25:28,959 It is a slow process 223 00:25:29,159 --> 00:25:36,964 The asteroid pays with equal force Weight a few grapes on the ground 224 00:25:37,825 --> 00:25:43,393 "But when it turns" Pino Around the sun it warms one of its sides 225 00:25:43,393 --> 00:25:47,735 What he pays for a different orbit 226 00:25:50,055 --> 00:25:52,747 Effect of Yarkovski problem 227 00:25:52,947 --> 00:25:58,384 If gravity alone affects those asteroids To predict the location of all asteroids and planets 228 00:25:58,584 --> 00:26:02,745 We were able to figure out the path of those Asteroids for many years to come 229 00:26:02,945 --> 00:26:07,522 But this is changing with the influence of Yarkovski In a way that makes it difficult to predict 230 00:26:07,722 --> 00:26:12,418 It depends on how opaque The asteroid, though it revolves and its shape 231 00:26:12,418 --> 00:26:19,031 It makes the orbit of the asteroid difficult Predicting the distant future 232 00:26:20,028 --> 00:26:27,230 The effect of Yarkovski makes anticipation movement Asteroids like Pino are more difficult 233 00:26:27,430 --> 00:26:32,084 But the protectors of our planet are adept 234 00:26:32,084 --> 00:26:37,735 They try to use the effect of Yarkovski To make a new weapon in their arsenal 235 00:26:37,935 --> 00:26:43,539 We know that the effect of Yarkovski The orbits of asteroids change a lot 236 00:26:43,739 --> 00:26:48,763 It is an effect we can use To move the asteroid ourselves 237 00:26:48,963 --> 00:26:57,707 If we could change the way the sun warms up to the asteroid Change its color or change its shape to heat in a specific way 238 00:26:57,707 --> 00:27:00,779 We can change its orbit in that way 239 00:27:01,679 --> 00:27:05,740 If scientists could send Satellite to asteroid 240 00:27:05,740 --> 00:27:12,132 It can use black or paint White to increase or reduce the heating effect 241 00:27:12,332 --> 00:27:15,667 "But at the University of Southern California 242 00:27:15,667 --> 00:27:19,958 A team of scientists is working on a high-tech solution 243 00:27:20,158 --> 00:27:27,526 They want superiority On Effect Yarkovski " Using Laser Space he claims " De - Star 244 00:27:28,186 --> 00:27:31,610 Imagine Our vision For the asteroid Heading Toward Earth 245 00:27:31,810 --> 00:27:35,741 We can Use Laser Space Let's beat asteroid 246 00:27:35,941 --> 00:27:40,842 We do By steaming Subject Surface Which Turn over For gas Which Stretching Quickly 247 00:27:41,042 --> 00:27:48,811 and this is Works As a sniper We can Use it A girl asteroid to me a path More Secure Also 248 00:27:50,075 --> 00:27:57,606 Laser Space station a weapon strong else For protection Our planet Whose They fight Asteroids 249 00:27:57,806 --> 00:28:01,103 It Join For locomotives gravity 250 00:28:01,303 --> 00:28:02,949 And smashes Kinetics 251 00:28:03,549 --> 00:28:07,261 And weapons Nuclear weapons in a Arsenal 252 00:28:07,461 --> 00:28:12,237 But There is Problem big 253 00:28:12,437 --> 00:28:17,155 all means Defense Before Asteroids Which We mentioned it Enabled Technically 254 00:28:17,355 --> 00:28:23,931 the problem Scary It Non Ready to me right Now 255 00:28:23,999 --> 00:28:26,246 did not It is Time To stop Disaster End to me right Now 256 00:28:26,446 --> 00:28:31,560 We achieved Lots From Progress Particularly in a the years Few Past But did not We do it distance 257 00:28:31,560 --> 00:28:37,291 But may blade For those Stage Probably distance ten or five ten Year 258 00:28:39,954 --> 00:28:42,560 But No You are afraid 259 00:28:42,760 --> 00:28:52,825 I have Earth defense Built-in Can burn Asteroids Before that Hit Until Surface 260 00:29:09,045 --> 00:29:10,199 " Arizona " 261 00:29:10,199 --> 00:29:13,608 The second From June Public 2016 262 00:29:13,808 --> 00:29:19,203 a rock View five Feet Hurry up Toward Earth 263 00:29:19,403 --> 00:29:24,195 Moving Quickly Similar Forty a thousand Mile in a the clock 264 00:29:24,395 --> 00:29:29,794 While Hurry up above Headers They Illuminates The sky 265 00:29:32,242 --> 00:29:39,199 in a the morning Early, burst Asteroid With a cover Earth Quickly Override shot Venice Much 266 00:29:39,399 --> 00:29:44,098 she was There a ball Fireworks Lit up Rocks Red From Around us night 267 00:29:44,098 --> 00:29:50,135 she was Shiny Including Enough To burn Machines " NASA " for photography On Earth Which We were We use it to observe Balls Firework 268 00:29:50,135 --> 00:29:57,140 It was asteroid On distance Seconds From Collision It seemed Harm Great Inevitably 269 00:29:59,877 --> 00:30:04,911 But did not Succeed asteroid in a Access For surface, Why? 270 00:30:06,278 --> 00:30:11,307 we've got Mind natural against Shock Asteroids Small On the least 271 00:30:11,507 --> 00:30:13,616 And let me Indicate it to you 272 00:30:19,029 --> 00:30:23,163 sound Air From Around us Thin On that Repel Risk From The space 273 00:30:23,163 --> 00:30:28,508 But Cover Air in a Reality he is else Line defense Before Asteroids 274 00:30:29,617 --> 00:30:35,388 Will be able to Hama Our planet in a day What From Save us From Blows Asteroids 275 00:30:35,588 --> 00:30:41,581 But Thus, We need Accreditation ... on System defense Earth Built-in 276 00:30:42,547 --> 00:30:43,999 Atmosphere 277 00:30:44,955 --> 00:30:48,475 We know Reality that Our cover Air Works As a shield Protective 278 00:30:48,475 --> 00:30:52,301 Because Asteroids Come to me Earth Each day 279 00:30:52,501 --> 00:30:55,229 Some of them Small, Some of them Larger Little 280 00:30:55,429 --> 00:31:02,117 But What Happen or occur It when intervention Cover Air Quickly High He shall Friction Burn them 281 00:31:02,317 --> 00:31:11,141 despite that Layers Cover High Thin Except It Extreme Density In comparison with With a smell The space 282 00:31:12,607 --> 00:31:15,432 When Hurry up Asteroids Rocky Through Cover Air 283 00:31:15,632 --> 00:31:21,469 The Friction And pressure Air Heated For more From 3000 degrees F 284 00:31:22,344 --> 00:31:25,624 whenever It was asteroid Great It took Burn it Time Longer 285 00:31:25,824 --> 00:31:31,831 For For those Rocks Huge may Be Effects big 286 00:31:32,031 --> 00:31:35,589 If I was there a rock big Including Enough No Burning Soon 287 00:31:35,789 --> 00:31:43,142 We call it By ghosts Explosive, And when Drops Chehab Through Cover It is Make Offer Cool We call it The ball Firework 288 00:31:43,999 --> 00:31:46,594 in a February 2013 289 00:31:46,594 --> 00:31:50,643 town " Chelyabinsk " in the " Russia " was exposed The ball Fireworks 290 00:31:50,643 --> 00:31:55,018 When Launched a rock Space View Steen ahead Through The sky 291 00:31:58,505 --> 00:32:02,234 It was This asteroid Greatest From bus School 292 00:32:03,715 --> 00:32:07,713 He went Quickly One ten Miles in a the second 293 00:32:07,913 --> 00:32:10,564 Done Heat it up Strongly, And disintegration to me parts Small 294 00:32:10,564 --> 00:32:13,703 Then Broken That Parts Cover Air 295 00:32:13,903 --> 00:32:21,289 When Turned Each That energy Kinetics For those the rock to me Light And heat They It exploded 296 00:32:23,814 --> 00:32:31,742 shooting star " Chelyabinsk " is Greatest Body natural Done See it Enters Cover Air For more From A hundred Public 297 00:32:33,713 --> 00:32:41,440 burst above Surface Earth I commend ten Miles Strongly Thirty bomb Nuclear weapons 298 00:32:44,257 --> 00:32:50,720 Latest The explosion alpha And five hundred infection, And damage Seven Thousands Building 299 00:32:51,593 --> 00:32:59,152 If did not Exists Shield Protective For our cover Air for you Results More Worse 300 00:33:01,485 --> 00:33:07,352 Lie the problem that Cover will not Protect us but From Asteroids Rocky And pile The ruins 301 00:33:07,352 --> 00:33:10,293 Until Show A hundred Foot Approximately 302 00:33:10,493 --> 00:33:15,584 There Thing The most dangerous Must be Put it down In mind 303 00:33:15,584 --> 00:33:18,166 Asteroids Metal 304 00:33:18,166 --> 00:33:24,539 If We were shocked Asteroid rocky or Cumulative You will not Reach to me Earth 305 00:33:24,739 --> 00:33:29,676 asteroid View A hundred Foot Approximately Explodes in a The sky 306 00:33:30,951 --> 00:33:33,257 If bumped into Us Asteroid metallic View A hundred Foot 307 00:33:33,257 --> 00:33:34,937 You will not He warns us in a Place the first 308 00:33:34,937 --> 00:33:40,187 I will crash With a layer Cover High Then Hit Land distance a second 309 00:33:40,187 --> 00:33:46,812 To happen An explosion Great It is manufactured nozzle View Mile Approximately 310 00:33:46,812 --> 00:33:58,445 Will settle Buildings Land And die Millions By Wave Shock Which Spread 311 00:33:58,445 --> 00:34:05,055 And fall down layer From the dust again On Orbit Minutes Watches next 312 00:34:05,255 --> 00:34:08,753 Penetrates asteroid Metal Cover Air 313 00:34:08,753 --> 00:34:13,541 For difficulty that The Friction And pressure Air Shredded Fully 314 00:34:14,142 --> 00:34:19,328 He hits Land in a Explosion disastrous 315 00:34:20,325 --> 00:34:26,145 may Be Asteroids Metal Old Enemies Hama The Planet 316 00:34:28,953 --> 00:34:34,505 But It is clear to have Earth For a defense Built-in else 317 00:34:35,539 --> 00:34:41,238 We know that Quickie Hacked Cover Air And destroyed Dinosaurs 318 00:34:42,028 --> 00:34:46,753 But Shows Search that Our planet Probably Save it 319 00:34:46,953 --> 00:34:49,713 she was Dinosaurs Non Lucky Absolutely 320 00:34:49,713 --> 00:34:55,034 Until If Hacked asteroid Our cover Air No Still we've got Line defense 321 00:34:55,864 --> 00:35:01,563 Not Installation asteroid Always What Make Difference 322 00:35:02,655 --> 00:35:08,390 But Regards Command Sometimes Location His shock Your 323 00:35:26,027 --> 00:35:35,478 The Hama Our planet Making Techniques To change a path Asteroid disastrous 324 00:35:37,117 --> 00:35:44,405 But Until Completed Their arsenal I have Earth Methods in a Defense 325 00:35:45,887 --> 00:35:50,735 one The things Sure that Quickie or Meteor It will shock us 326 00:35:50,935 --> 00:35:53,554 Probably will not Happen or occur that Before Millions the years But Will happen 327 00:35:53,754 --> 00:35:59,765 In This Today, What I will differentiate between that is being Days Thrilling or Disaster International 328 00:35:59,765 --> 00:36:03,005 Signed, Site, Site 329 00:36:05,355 --> 00:36:12,846 Could you Some Areas Earth that Reduce From Destruction The resulting About asteroid the killer 330 00:36:13,046 --> 00:36:15,530 How do We know that? 331 00:36:15,542 --> 00:36:16,959 Dinosaurs 332 00:36:17,159 --> 00:36:18,490 Before 65 million Years 333 00:36:18,490 --> 00:36:28,773 It was luck Dinosaurs Bad, It was Their luck Thrilling Exterminate them Collision Asteroid 334 00:36:29,636 --> 00:36:31,846 We thought With our knowledge Of the story complete 335 00:36:33,012 --> 00:36:37,567 But show up Researchers An order Amazing 336 00:36:37,767 --> 00:36:47,638 If Shocked asteroid Earth Then In minutes Just I stayed Scouring Dinosaurs Earth Today 337 00:36:49,244 --> 00:36:50,896 but how? 338 00:36:51,096 --> 00:36:53,245 He did This the body By collision " At Semi Island " Yucatan 339 00:36:53,445 --> 00:36:56,477 Latest Waves Tsunami Giant Drowned USA North 340 00:36:56,677 --> 00:37:00,256 But cast down Also Much From Sulfur in a Air 341 00:37:03,184 --> 00:37:06,732 Down asteroid ZO Show The six Miles in a The seas Shallow 342 00:37:06,732 --> 00:37:09,454 Which She became bay Mexico Currently 343 00:37:12,518 --> 00:37:16,872 He did By steaming Rocks Bekaa Sea Shelf Continental 344 00:37:17,451 --> 00:37:22,699 dawn Collision Trillions Tons From Gases to me Cover Air 345 00:37:23,769 --> 00:37:26,952 To raise Change Climatically Karthia 346 00:37:27,152 --> 00:37:35,307 Extinct seventy percent From all Biology On Earth Including In which Dinosaurs three hundred fifty 00:37:35,407 --> 00:37:41,081 This Horrible Because he If Dart Earth More Little At This occurs Collision 347 00:37:41,081 --> 00:37:46,933 He would in a Ocean The deeper And why? Resulted all That Rocks Frying And sulfur 348 00:37:50,668 --> 00:37:54,410 Spins Our planet Quickly a thousand Mile in a the clock 349 00:37:54,610 --> 00:38:00,588 Covering Oceans seventy percent From Surface Earth 350 00:38:01,488 --> 00:38:07,769 Some Luckily, To collide destructive Dinosaurs Water The deeper 351 00:38:07,969 --> 00:38:13,854 No exist a place good On Earth Potentially a hit Asteroid View five Miles, No exist a place good 352 00:38:13,854 --> 00:38:15,314 There is Bekaa worst From Other 353 00:38:15,314 --> 00:38:20,813 And semi Island " Yucatan " with this Destiny From Sulfur she was worst a place Maybe 354 00:38:21,013 --> 00:38:23,970 Movie It is Days Well 355 00:38:26,363 --> 00:38:31,940 asteroid Which killing Dinosaurs allowed Our - mammals - Domination On Earth 356 00:38:32,140 --> 00:38:39,295 For good Luckily, Hit That Asteroids Giant Once Each a few Millions Public 357 00:38:39,495 --> 00:38:49,840 But Each 2000 General, get up a rock Size Stadium a ball Foot Impacting Land 358 00:38:50,040 --> 00:38:56,995 What Happen or occur When get up one That Asteroids smaller Common By collision The ocean? 359 00:38:56,995 --> 00:39:00,081 If You imagined Ocean Pacific, There is Line coastal Long 360 00:39:00,081 --> 00:39:03,197 And therefore exist People Many susceptible At risk 361 00:39:03,197 --> 00:39:05,685 most Surface Earth Oceans 362 00:39:05,685 --> 00:39:10,252 Probability Contained that The asteroid Impacting The ocean 363 00:39:10,252 --> 00:39:15,129 The question he is What Bezel gravity Tsunami Resulting? 364 00:39:16,885 --> 00:39:24,181 He did Scientists Simulated What may Happen or occur If hit Asteroid Various Areas in a Ocean 365 00:39:24,994 --> 00:39:32,496 I studied Three Dimensions Various Species Compositions And various Deep Ocean And various Angles Access 366 00:39:32,496 --> 00:39:37,834 And we realized that Shelf Continental He saves us Already . 367 00:39:39,637 --> 00:39:47,101 Shelf Continental Mass floor Under water Stretch Approximate Fifty Miles Off the coast 368 00:39:47,301 --> 00:39:53,971 When Hit Asteroid View favorable Feet Deeply Ocean 369 00:39:53,971 --> 00:40:02,329 The the sea Shallow Which Make it Shelf Continental may Weakens Tsunami Before that Hits Land 370 00:40:02,529 --> 00:40:07,119 sound that Ocean he have Our defense 371 00:40:07,319 --> 00:40:15,437 For For depth Ocean, Believe that asteroid smaller From Show 400 feet, and this is Large, will not it causes Danger Tsunami 372 00:40:15,437 --> 00:40:19,296 No Do not Of concern as such We were We worry About him 373 00:40:20,124 --> 00:40:26,339 This Section Shallow From water Eases Which Wave Tsunami coming 374 00:40:32,733 --> 00:40:36,267 So I have Our planet Mechanisms Defensive 375 00:40:36,267 --> 00:40:42,938 And innovates Our scientists Plans To move confrontation to me Asteroids 376 00:40:43,138 --> 00:40:47,356 No They need but Time 377 00:40:48,522 --> 00:40:55,780 Can Science Astronomy rescue the world Because we are We watch all Asteroids Which may Shocked Earth Days What 378 00:40:55,780 --> 00:41:00,954 Though We found on her We can avoid Event extermination Civilization 379 00:41:00,954 --> 00:41:05,400 If It was we've got Time Warning We have Feature Ability On Thinking Problem 380 00:41:05,600 --> 00:41:09,076 Planning to her Building Technologies 381 00:41:09,076 --> 00:41:12,015 Training On Technologies Required A girl This asteroid About Our way 382 00:41:12,015 --> 00:41:13,979 Time Our ally 383 00:41:15,765 --> 00:41:19,224 We are not Ready To prevent Disaster End distance 384 00:41:20,361 --> 00:41:28,892 But Take care Difference protection The Planet the case We have Chance To fight 385 00:41:29,092 --> 00:41:34,535 If You wanted knowledge worst Nightmares Astronomers Will be Clash asteroid 386 00:41:34,535 --> 00:41:36,583 it's a Command Personal 387 00:41:37,433 --> 00:41:40,190 it's a Happen or occur Here On Earth 388 00:41:40,390 --> 00:41:45,430 it's a challenge Our Therefore We want Prevent it 389 00:41:45,630 --> 00:41:50,782 News Good We did On Cusp that We can From A change Track 390 00:41:50,782 --> 00:41:54,429 We are blade, We Go ahead ahead 391 00:41:56,390 --> 00:41:58,332 The Planet flexible Too 392 00:41:58,532 --> 00:42:07,489 Until If she was There Platoon Poor or Person Weak The land As a whole Strong 393 00:42:07,689 --> 00:42:14,415 Back To us we Humans that Be Our will To discover And exploration And understand the system Solar system 394 00:42:14,415 --> 00:42:17,396 Becomes Command Important when Think Asteroids 395 00:42:17,596 --> 00:42:23,897 We Continuity Survey The sky And that We remain Scientists Until We defend About Earth