1 00:00:00,000 --> 00:00:02,060 you 2 00:00:30,000 --> 00:00:32,060 you 3 00:01:00,000 --> 00:01:02,060 you 4 00:01:05,920 --> 00:01:11,400 five miles above the moon Dave Scott and Jim Irwin looked out the window of 5 00:01:11,400 --> 00:01:15,960 their lunar module down toward Al Worden in the command module which had 6 00:01:15,960 --> 00:01:21,680 completed its separation maneuver beneath them the 15,000 foot peaks of the 7 00:01:21,680 --> 00:01:26,840 lunar aponine mountain soon they would fly low over those peaks on their way to 8 00:01:26,840 --> 00:01:31,840 a landing in a little valley in the mountains of the moon 9 00:01:35,000 --> 00:01:45,920 coming up on pitch over he 64 then LPD LPD coming right out their window they 10 00:01:45,920 --> 00:01:50,520 could see the sinuous meanderings of the lunar canyon known as Hadley Rill as 11 00:01:50,520 --> 00:01:55,960 they brought their lunar module calls sign Falcon toward its landing and the 12 00:01:55,959 --> 00:01:59,439 beginning of what would be one of the most significant chapters in the 13 00:01:59,439 --> 00:02:02,439 history of scientific exploration 14 00:02:04,239 --> 00:02:12,959 200 minus 1150 minus 7 minus 6 15 00:02:12,960 --> 00:02:25,719 120 feet minus 6 minus 5 80 at 5 minus 3 16 00:02:25,719 --> 00:02:28,719 60 at 3 17 00:02:28,919 --> 00:02:35,680 if you three cross pointers look good 40 at 3 18 00:02:36,759 --> 00:02:39,759 30 3 19 00:02:40,400 --> 00:02:44,400 25 2 20 00:02:44,560 --> 00:02:58,159 they have got less 7% fuel 20 at 1 15 at 1 minus 1 minus 1 6 percent fuel 10 21 00:02:58,159 --> 00:03:01,159 feet minus 1 22 00:03:02,360 --> 00:03:07,920 8 feet minus 1 contact man 23 00:03:08,119 --> 00:03:14,919 okay the balcony is on the plane at Hadley Roger Roger Falcon 24 00:03:14,919 --> 00:03:18,919 no denying that we had contact 25 00:03:18,919 --> 00:03:22,679 Houston the Hadley base here tell those geologists in the back room to get ready 26 00:03:22,679 --> 00:03:26,399 because we've really got something for him 27 00:03:26,719 --> 00:03:31,639 Scott and Irwin were located on an undulating plane situated between the 28 00:03:31,639 --> 00:03:36,679 aponines and Hadley Rill an area selected by the scientists as being one 29 00:03:36,680 --> 00:03:39,879 of the most geologically significant sites on the moon 30 00:03:41,879 --> 00:03:47,319 okay over here that's just open and latch two hours after touchdown Dave 31 00:03:47,319 --> 00:03:53,640 Scott stood up in Falcons upper hatch to survey their landing area oh boy what 32 00:03:53,640 --> 00:04:00,560 have you I can see Bruton and Icarus as Scott stood describing the craters and 33 00:04:00,560 --> 00:04:04,879 mountains we on earth perhaps did not yet realize the scope and extent of the 34 00:04:04,879 --> 00:04:10,359 coming mission aboard the lunar module was a small doombuggy like car called 35 00:04:10,359 --> 00:04:16,159 the lunar roving vehicle or just plain rover the astronauts would travel miles 36 00:04:16,159 --> 00:04:21,079 in collecting samples and placing and conducting experiments there are no 37 00:04:21,079 --> 00:04:26,159 sharp jagged piece or no large boulders apparent anywhere they would observe the 38 00:04:26,159 --> 00:04:30,800 layering of the lunar terrain most clearly seen in the formation 14 miles 39 00:04:30,800 --> 00:04:36,680 to the south called silver spur this layering later to be observed in the 40 00:04:36,680 --> 00:04:41,040 mountains and the real give scientists a direct look at the structure of the 41 00:04:41,040 --> 00:04:45,520 moon and the deeper insight as to the significance of the collected sample 42 00:04:52,519 --> 00:05:00,759 the journey of Apollo 15 had begun four days earlier July 26 1971 the crew 43 00:05:00,759 --> 00:05:07,599 Dave Scott spacecraft commander and veteran of Gemini 8 and Apollo 9 Jim 44 00:05:07,599 --> 00:05:11,879 Irwin lunar module pilot who would explore Hadley rill and the Apennine 45 00:05:11,879 --> 00:05:17,599 front with Scott Al Worden command module pilot who would remain in lunar 46 00:05:17,599 --> 00:05:22,319 orbit operating an extensive array of cameras and experiments and making 47 00:05:22,319 --> 00:05:27,039 observations which when coupled with the surface work of Scott and Irwin would 48 00:05:27,040 --> 00:05:31,080 give the most comprehensive picture of the moon's structure and history ever 49 00:05:31,080 --> 00:05:33,080 achieved 50 00:05:57,040 --> 00:06:12,120 precisely on schedule 934 a.m. Apollo 15 lifted from the pad on its way to the 51 00:06:12,120 --> 00:06:21,439 moon with the exception of a few minor problems the trip out would be 52 00:06:21,439 --> 00:06:27,120 uneven the command module Endeavour carrying the lunar module Falcon would 53 00:06:27,120 --> 00:06:31,240 arrive in lunar orbit with Scott's announcement 54 00:06:31,240 --> 00:06:39,279 with cargo and what a fantastic sight this is really profound I'll tell you 55 00:06:39,279 --> 00:06:44,040 this is absolutely mind-boggling gentlemen I can well imagine that a 56 00:06:44,040 --> 00:06:48,480 foreign planet must be a weird thing to see 57 00:06:51,439 --> 00:06:59,199 July 31st after a night's rest Dave Scott descended into the lunar morning 58 00:07:01,600 --> 00:07:04,600 okay 59 00:07:04,600 --> 00:07:11,800 stand out here the wonders of the unknown at Hadley I realize there's a 60 00:07:11,800 --> 00:07:19,360 fundamental truth to our nature man must explore and this is exploration 61 00:07:19,360 --> 00:07:25,879 Scott was then joined by Jim Irwin 62 00:07:36,400 --> 00:07:42,800 their first job was to get the lunar roving vehicle out of its storage bay 63 00:07:50,360 --> 00:07:57,080 they can't pull it out a little bit Jim that looks good 64 00:07:57,080 --> 00:08:04,040 boy is this dirt rock like soft powder snow 65 00:08:05,280 --> 00:08:12,080 next the astronauts tried out the rover during this test drive one failure 66 00:08:12,080 --> 00:08:16,720 showed up the rover was designed to steer through both its front and rear 67 00:08:16,720 --> 00:08:19,720 wheels 68 00:08:20,720 --> 00:08:24,440 I don't have any front steering Jill 69 00:08:24,440 --> 00:08:27,440 like this rear steering Dave yeah 70 00:08:30,880 --> 00:08:37,080 in youth the absence of front wheel steering would hardly be noticed then 71 00:08:37,080 --> 00:08:41,960 they loaded the equipment they would need for their geological survey and 72 00:08:41,960 --> 00:08:45,960 boarded the rover for their first exploration 73 00:08:50,960 --> 00:08:55,600 they were headed towards st. George crater located on a mountain slope above 74 00:08:55,600 --> 00:08:58,600 Hadley rill to the south of the landing site 75 00:08:58,600 --> 00:09:01,600 yeah 76 00:09:06,600 --> 00:09:09,600 yeah 77 00:09:09,600 --> 00:09:14,159 yeah this is really a rock and roll right in it there would be a stop to 78 00:09:14,159 --> 00:09:19,040 collect samples of a smaller crater called Elbow then arrival at the base of 79 00:09:19,040 --> 00:09:22,040 st. George and a look into Hadley rill 80 00:09:23,039 --> 00:09:28,039 oh look at that oh look back there look at that 81 00:09:28,039 --> 00:09:31,039 that's beautiful that is spectacular 82 00:09:31,039 --> 00:09:36,039 this is unreal the most beautiful thing I've ever seen 83 00:09:37,039 --> 00:09:41,879 Scott then adjusted the television antenna on the rover a quarter of a 84 00:09:41,879 --> 00:09:46,799 million miles away in Houston's mission control a flight controller operated 85 00:09:46,799 --> 00:09:51,399 the television camera mounted on the rover scientists and engineers on earth 86 00:09:51,399 --> 00:09:55,720 could directly monitor the lunar exploration and those of us at home 87 00:09:55,720 --> 00:09:59,399 watching on television felt like the third astronaut on the moon 88 00:10:00,399 --> 00:10:02,399 it looks fairly recent doesn't it? 89 00:10:02,399 --> 00:10:04,399 it sure does 90 00:10:04,399 --> 00:10:09,399 okay now we got the fillet, we got the soil, now we need to sample the rock 91 00:10:09,399 --> 00:10:15,199 the astronauts began to collect samples and photograph the area the samples would 92 00:10:15,199 --> 00:10:20,399 consist of rocks picked up with a rake like device soil samples selected rocks 93 00:10:20,399 --> 00:10:23,399 and chips taken from boulders 94 00:10:23,399 --> 00:10:27,399 can you imagine that Joe? Here sits this rock and it's been here since before 95 00:10:27,399 --> 00:10:30,399 creatures roamed the sea on all the earth 96 00:10:30,399 --> 00:10:34,399 they would also drive core tubes into the lunar soil to collect contiguous 97 00:10:34,399 --> 00:10:37,399 specimens from beneath the surface 98 00:10:39,399 --> 00:10:43,399 but now it was time to return to the lunar module not to end this first work 99 00:10:43,399 --> 00:10:47,399 period on the lunar surface but to begin another phase 100 00:10:48,399 --> 00:10:51,399 I can't believe we came over those mountains 101 00:10:55,399 --> 00:10:58,399 we did, they're just a beautiful little valley 102 00:11:00,399 --> 00:11:03,399 yeah those are pretty big mountains to fly over aren't they? 103 00:11:09,399 --> 00:11:13,399 after returning to the lem to load equipment they moved to a nearby 104 00:11:13,399 --> 00:11:17,399 location to set up a science station similar to those left on previous 105 00:11:17,399 --> 00:11:22,399 missions with the establishment of these experiments a network of scientific 106 00:11:22,399 --> 00:11:27,399 stations was achieved which would allow triangulation of events and give us the 107 00:11:27,399 --> 00:11:31,399 ability to locate precisely the origin of lunar events 108 00:11:32,399 --> 00:11:36,399 as they worked one of their instructions was to throw the packings as far as 109 00:11:36,399 --> 00:11:38,399 possible from the site 110 00:11:38,399 --> 00:11:40,399 Dave Scott 111 00:11:40,399 --> 00:11:42,399 I'll give you a demonstration here Joe 112 00:11:43,399 --> 00:11:45,399 Roger, right on 113 00:11:49,399 --> 00:11:51,399 Spectacular demonstration 114 00:11:52,399 --> 00:11:54,399 I will, nothing to add 115 00:11:54,399 --> 00:11:55,399 Lovely 116 00:11:55,399 --> 00:11:57,399 What was that a demonstration of by the way? 117 00:11:58,399 --> 00:12:03,399 It started out to be of gravity and it wound up being of a centrifugal force I think 118 00:12:04,399 --> 00:12:10,399 Using an electric drill Scott sank a tube into the lunar soil into which a 119 00:12:10,399 --> 00:12:14,399 probe would be placed to measure heat flow in the lunar material 120 00:12:14,399 --> 00:12:18,399 the difficulty in drilling would delay placement of the second probe until the 121 00:12:18,399 --> 00:12:20,399 next day 122 00:12:26,399 --> 00:12:29,399 the science station was then activated 123 00:12:29,399 --> 00:12:34,399 and Scott and Erwin closed Falcon's hatch on EVA number one 124 00:12:51,399 --> 00:12:56,399 60 miles above the moon Al Worden orbited in the command module Endeavour 125 00:12:56,399 --> 00:13:00,399 operating experiments his observations adding to the wealth of scientific data 126 00:13:00,399 --> 00:13:02,399 already accumulated 127 00:13:02,399 --> 00:13:06,399 Okay I'm looking right down on letro now and a very interesting thing 128 00:13:06,399 --> 00:13:10,399 looks like a whole field of small cinder cones down there 129 00:13:10,399 --> 00:13:15,399 the detection of cinder cones clearly of volcanic origin helped solve another 130 00:13:15,399 --> 00:13:20,399 element of the controversy about how much of the moon was formed by volcanoes 131 00:13:20,399 --> 00:13:23,399 and how much by meteoroid impact 132 00:13:24,399 --> 00:13:29,399 Warden was operating a series of experiments in the scientific instrument module 133 00:13:29,399 --> 00:13:34,399 these included a mapping camera to shoot lunar features and simultaneously the 134 00:13:34,399 --> 00:13:39,399 star field for accurate location of these features a panoramic camera a laser 135 00:13:39,399 --> 00:13:44,399 altimeter for accurate topographical mapping and a series of experiments to 136 00:13:44,399 --> 00:13:48,399 analyze the chemical makeup of the lunar crust 137 00:13:48,399 --> 00:13:52,399 in the estimation of a number of scientists this orbital research station 138 00:13:52,399 --> 00:13:56,399 would provide the most important information collected during the mission 139 00:14:04,399 --> 00:14:10,399 August 1st Scott and Erwin prepared for their second day on the moon and as Scott 140 00:14:10,399 --> 00:14:13,399 checked the inoperative forward steering of the rover 141 00:14:18,399 --> 00:14:24,399 Good work Dave. Yes sir. It's working my friend. Beautiful. 142 00:14:25,399 --> 00:14:30,399 Their destination was the base of the Apennine front. Here they hope to find 143 00:14:30,399 --> 00:14:33,399 some of the basic substance of the lunar highlands. 144 00:14:34,399 --> 00:14:41,399 As we drive up sun here I can see Mount Hadley and the linear patterns in it are 145 00:14:41,399 --> 00:14:43,399 really remarkable. 146 00:14:44,399 --> 00:14:49,399 Then they began the physical sampling of the Apennine front stopping at four 147 00:14:49,399 --> 00:14:51,399 craters in their traverse. 148 00:14:52,399 --> 00:14:56,399 Oh boy. It's a nice little crater isn't it? It sure is. 149 00:14:58,399 --> 00:15:01,399 Okay Dewey let's go to work. Roger. 150 00:15:04,399 --> 00:15:09,399 Look at that. Wow. Almost see twinning in there. Guess what we just found. 151 00:15:09,399 --> 00:15:15,399 I think we found what we came for. Crystals rock huh? Yes sir. You better believe it. 152 00:15:15,399 --> 00:15:20,399 To the untrained eye it looked like just another rock but its large crystals 153 00:15:20,399 --> 00:15:26,399 formed in pairs called twinning showed it to be a section of primal lunar crust 154 00:15:26,399 --> 00:15:30,399 formed during the earliest history of the solar system not obliterated by 155 00:15:30,399 --> 00:15:36,399 billions of years of impacts and lava flows. It was a key to many mysteries. 156 00:15:36,399 --> 00:15:42,399 Was the early lunar crust molten? Why differences in color and density between 157 00:15:42,399 --> 00:15:47,399 the highlands and lowlands? Nicknamed the Genesis rock it stands as a major clue 158 00:15:47,399 --> 00:15:52,399 in unraveling the formative processes of the moon, the earth and the planets. 159 00:15:55,399 --> 00:15:59,399 Let's make this bag number 196 a special bag. Yes sir. 160 00:16:00,399 --> 00:16:06,399 Joe this crater is a gold mine. And there might be diamonds in the next one. 161 00:16:07,399 --> 00:16:13,399 Yeah babe. Then we saw another practical use of television in lunar exploration. 162 00:16:13,399 --> 00:16:19,399 And Dave you're going to want to cinch up Jim's collection bag probably before you g... 163 00:16:19,399 --> 00:16:23,399 It's coming very loose there. Okay. 164 00:16:23,399 --> 00:16:28,399 Okay. Let me do it right now Joe so we don't forget it. 165 00:16:28,399 --> 00:16:33,399 Roger we sure don't want to lose that one. I don't know what we'll do with Roger Joe. 166 00:16:33,399 --> 00:16:38,399 Okay Jim let's get on a rover and get back. 167 00:16:38,399 --> 00:16:43,399 It's nice to sit down in it. Oh it is. 168 00:16:43,399 --> 00:16:48,399 Okay we're on our tracks. Roger. 169 00:16:48,399 --> 00:16:53,399 And follow on home. 170 00:16:53,399 --> 00:16:58,399 We're sure on a neat rocks in the noon too bad we can't spend some more time. 171 00:16:58,399 --> 00:17:03,399 On your next trip. Yeah next trip you're right. 172 00:17:03,399 --> 00:17:08,400 I could be seasick. What do you expect traveling on the moray? 173 00:17:08,400 --> 00:17:13,400 They returned to the science station where Scott once more manned the drill to place ... 174 00:17:13,400 --> 00:17:18,400 The difficulty in drilling was shown by Scott's hand which would carry bruised... 175 00:17:18,400 --> 00:17:23,400 Okay Dave take heart you've got just one minute of drilling left. 176 00:17:23,400 --> 00:17:28,400 Okay we made a little bit you didn't make it. Hand over fifth. 177 00:17:28,400 --> 00:17:33,400 Okay. 178 00:17:33,400 --> 00:17:38,400 Okay we made a little bit you didn't make it. Hand over fifth. 179 00:17:38,400 --> 00:17:43,400 It was time to get back into the lem and end EVA 2. 180 00:17:43,400 --> 00:17:48,400 The drill and attached sections were left in the ground for removal during the next day... 181 00:17:48,400 --> 00:17:53,400 On earth scientists poured over data from the television, from the astronauts descriptio... 182 00:17:53,400 --> 00:17:58,400 On earth scientists poured over data from the television, from the astronauts descriptio... 183 00:17:58,400 --> 00:18:03,400 The 1400 photographs the crew would return would themselves constitute a major... 184 00:18:03,400 --> 00:18:08,400 The 1400 photographs the crew would return would themselves constitute a major... 185 00:18:08,400 --> 00:18:13,400 Lunar exploration was achieving a new maturity. 186 00:18:13,400 --> 00:18:18,400 We are now exploring to test new hypotheses and the pieces were fitting together. 187 00:18:18,400 --> 00:18:23,400 One scientist when asked why he didn't sit down and rest after an around the clock... 188 00:18:23,400 --> 00:18:28,400 I can't I'm too excited. 189 00:18:28,400 --> 00:18:33,400 Oh it's nice to be outside where you can stretch a little bit. 190 00:18:33,400 --> 00:18:38,400 Okay. 191 00:18:38,400 --> 00:18:43,400 It's the same. Hey I'll meet you up there. 192 00:18:43,400 --> 00:18:48,400 After the drill we last left our friend. 193 00:18:48,400 --> 00:18:53,400 If we could just get our shoulder under that. 194 00:18:53,400 --> 00:18:58,400 Their first stop was at the drill they had left during the second EVA. 195 00:18:58,400 --> 00:19:03,400 This core tube was the deepest sample ever collected from the moon. 196 00:19:03,400 --> 00:19:08,400 Perhaps the deepest we would ever get. Eight and a half feet beneath the surface cuttin... 197 00:19:08,400 --> 00:19:13,400 This would not only tell us more about the lunar structure, 198 00:19:13,400 --> 00:19:18,400 but the traces of particles emitted by the sun billions of years ago. 199 00:19:18,400 --> 00:19:23,400 Which would give us a clue to the early years of the solar system. 200 00:19:23,400 --> 00:19:28,400 But now it was time to leave the core tubes to be picked up later and head west northw... 201 00:19:28,400 --> 00:19:33,400 But now it was time to leave the core tubes to be picked up later and head west northw... 202 00:19:33,400 --> 00:19:38,400 Look at that grill. 203 00:19:38,400 --> 00:19:43,400 How about that? 204 00:19:43,400 --> 00:19:48,400 I can see maybe 10 very well defined layers within that unit. 205 00:19:48,400 --> 00:19:53,400 Hang on. 206 00:19:53,400 --> 00:19:58,400 Yeah. 207 00:19:58,400 --> 00:20:03,400 Alright. 208 00:20:03,400 --> 00:20:08,400 Very soft, but... 209 00:20:08,400 --> 00:20:13,400 Stuffed over that rock. 210 00:20:13,400 --> 00:20:18,400 Then Scott and Irwin descended a short distance over the rim of Hadley Rill 211 00:20:18,400 --> 00:20:23,400 to get a piece of one of the large blocks thought to be lunar bedrock. 212 00:20:23,400 --> 00:20:28,400 A big rock there. 213 00:20:28,400 --> 00:20:33,400 Yeah, chuck of the bedrock here. 214 00:20:33,400 --> 00:20:38,400 Get a little closer so you can get that big chip out of there. 215 00:20:38,400 --> 00:20:43,400 Right, where rock? 216 00:20:43,400 --> 00:20:48,400 Getting ready to move out Dave? Yep. 217 00:20:48,400 --> 00:20:53,400 And set up here for the next guy. 218 00:20:53,400 --> 00:20:58,400 Okay, I'm on it. 219 00:20:58,400 --> 00:21:03,400 They buckled their seatbelts for the ride back to the lunar module. 220 00:21:03,400 --> 00:21:08,400 Oh, what a big mountain that Hadley is. Yeah, it's beautiful. 221 00:21:08,400 --> 00:21:13,400 The sun is really fresh. Oh, look at the mountains today Jim when they're all sunli... 222 00:21:13,400 --> 00:21:18,400 It really is. My golly, that's just super. 223 00:21:18,400 --> 00:21:23,400 Unreal. 224 00:21:23,400 --> 00:21:28,400 Dave, I'm reminded of a favorite biblical passage from Psalms. 225 00:21:28,400 --> 00:21:33,400 I look under the hills from whence come with my help. 226 00:21:33,400 --> 00:21:38,400 But of course we get quite a bit from Houston too. 227 00:21:38,400 --> 00:21:43,400 After a stop to pick up the core samples, they returned to the Lem to close out thei... 228 00:21:43,400 --> 00:21:48,400 And they put the stamp on an interplanetary envelope. 229 00:21:48,400 --> 00:21:53,400 I'm very proud to have the opportunity here to play postman. 230 00:21:53,400 --> 00:21:58,400 What could be a better place to cancel the stamp than right here at Hadley real? 231 00:21:58,400 --> 00:22:03,400 Then a demonstration of a classic experiment. 232 00:22:03,400 --> 00:22:08,400 Well, in my left hand I have a feather. In my right hand a hammer. 233 00:22:08,400 --> 00:22:15,400 And we thought that was because of a gentleman named Galileo a long time ago wh... 234 00:22:15,400 --> 00:22:20,400 And we thought that where would be a better place to confirm his findings than on the... 235 00:22:20,400 --> 00:22:25,400 And so we thought we'd try it here for you. 236 00:22:25,400 --> 00:22:30,400 The feather happens to be appropriately a falcon feather for our falcon. 237 00:22:30,400 --> 00:22:35,400 And I'll drop the two of them here and hopefully they'll hit the ground at the sa... 238 00:22:35,400 --> 00:22:40,400 How about that? 239 00:22:40,400 --> 00:22:45,400 That was a good move that Mr. Galileo was correct in his findings. 240 00:22:45,400 --> 00:22:50,400 Finally, Scott drove the rover away from the Lem so that its TV camera could pick up a... 241 00:22:50,400 --> 00:22:55,400 As the space poet Reisling would say, we're ready for you to come back again to the ho... 242 00:22:55,400 --> 00:23:00,400 Thank you, Joe. We're ready too. 243 00:23:01,400 --> 00:23:06,400 But it's been great. 244 00:23:06,400 --> 00:23:11,400 171 hours and 37 minutes after they had lifted off the planet Earth, Scott and Erw... 245 00:23:11,400 --> 00:23:16,400 Accompanied by a musical salute they themselves would provide from a small tape... 246 00:23:16,400 --> 00:23:21,400 This liftoff is automatic. 247 00:23:22,400 --> 00:23:27,400 This liftoff is automatic. 248 00:23:27,400 --> 00:23:32,400 Wow. 249 00:23:32,400 --> 00:23:37,400 Look at that. 250 00:23:41,400 --> 00:23:46,400 It's like a 3-0 trick. 251 00:23:47,400 --> 00:23:52,400 Hey, good smooth ride, Ed. 252 00:23:52,400 --> 00:23:57,400 Sounds like the wind was right, didn't it? 253 00:23:57,400 --> 00:24:02,400 What a view of the real, huh? 254 00:24:02,400 --> 00:24:07,400 Older track coming down into it. 255 00:24:07,400 --> 00:24:12,400 The rendezvous and docking procedures were flawless, right on the money. 256 00:24:12,400 --> 00:24:17,400 But their jobs were not over yet. 257 00:24:17,400 --> 00:24:22,400 They would spend two more days in lunar orbit gathering data from the experiments and... 258 00:24:22,400 --> 00:24:27,400 One more day around the moon than any preceding mission. 259 00:24:27,400 --> 00:24:32,400 On August 4th, they prepared to come home. 260 00:24:33,400 --> 00:24:38,400 But even on their last orbit of the moon, they had another experiment. 261 00:24:38,400 --> 00:24:43,400 Three, two, one, launch. 262 00:24:43,400 --> 00:24:48,400 A very pretty satellite out there. 263 00:24:48,400 --> 00:24:53,400 They placed in orbit a subsatellite, the first ever launched by a manned spacecraft. 264 00:24:53,400 --> 00:24:58,400 It was designed to circle the moon for a year, measuring variations in lunar gravity, 265 00:24:58,400 --> 00:25:03,400 the strength and direction of interplanetary and Earth magnetic fields, 266 00:25:03,400 --> 00:25:08,400 and the flow of charged particles in space. 267 00:25:08,400 --> 00:25:13,400 Tracking stations have acquired the satellite. 268 00:25:13,400 --> 00:25:18,400 Then the burn to bring them back to Earth. 269 00:25:18,400 --> 00:25:23,400 But their jobs were far from over. 270 00:25:23,400 --> 00:25:28,400 After the moon was sent miles from Earth, Al Worden left the spacecraft to retrieve the... 271 00:25:28,400 --> 00:25:33,400 contained in the cassettes of the experiment bay cameras. 272 00:25:33,400 --> 00:25:38,400 Later they would turn their X-ray spectrometer toward the newly discovered... 273 00:25:38,400 --> 00:25:43,400 those mysterious black holes in space. 274 00:25:43,400 --> 00:25:48,400 At the same time, in accord with the previous plan, an Earth-based Soviet observatory 275 00:25:48,400 --> 00:25:53,400 was built to help derive a model consistent with both sets of observation. 276 00:25:53,400 --> 00:25:58,400 During the trip home, the X-ray spectrometer would observe seven X-ray sources 277 00:25:58,400 --> 00:26:03,400 and gather 50 hours of galactic data. 278 00:26:03,400 --> 00:26:08,400 Then on August 7th, they looked into the fireball created by the heat of their reen... 279 00:26:08,400 --> 00:26:13,400 at 25,000 miles per hour. 280 00:26:13,400 --> 00:26:18,400 Then there would be a heart-stopping moment as one of the three parachutes collapsed. 281 00:26:18,400 --> 00:26:23,400 However, the landing system was designed to use two parachutes. 282 00:26:23,400 --> 00:26:28,400 The third parachute was an added safety factor. Today, that margin paid off. 283 00:26:33,400 --> 00:26:38,400 The success of Apollo 15 had been spectacular. 284 00:26:38,400 --> 00:26:43,400 The results have been almost unbelievable. In the words of one scientist, a five-for-one... 285 00:26:43,400 --> 00:26:48,400 Yet while we rejoice in our success, we cannot afford to forget the sometimes pain... 286 00:26:48,400 --> 00:26:53,400 that gave us these achievements. 287 00:26:53,400 --> 00:26:58,400 I think many people have contributed to this pinnacle we've reached. 288 00:26:58,400 --> 00:27:03,400 Some have contributed more than others, and we know of 14 individuals who contributed ... 289 00:27:04,400 --> 00:27:09,400 And because of that, while we left a small memorial on the Moon, 290 00:27:09,400 --> 00:27:14,400 about 20 feet north of rover 1, in a small, subtle crater, 291 00:27:14,400 --> 00:27:19,400 there's a simple plaque with 14 names. And those are the names in alphabetical order 292 00:27:19,400 --> 00:27:24,400 of all the astronauts and cosmonauts who have died in the pursuit of exploration of space. 293 00:27:24,400 --> 00:27:29,400 Near it is a small figure representing a fallen astronaut. 294 00:27:30,400 --> 00:27:35,400 We went to the Moon as trained observers in order to gather data 295 00:27:35,400 --> 00:27:40,400 not only with our instruments on board, but with our minds. 296 00:27:40,400 --> 00:27:45,400 And I'd like to quote a statement from Plutarch, 297 00:27:45,400 --> 00:27:50,400 which I think expresses our feelings since we've come back. 298 00:27:50,400 --> 00:27:55,400 The mind is not a vessel to be filled, but a fire to be lighted. 299 00:27:55,400 --> 00:28:00,400 Thank you. 300 00:28:25,400 --> 00:28:30,400 Music 301 00:28:30,400 --> 00:28:35,400 Music 302 00:28:35,400 --> 00:28:40,400 Music 303 00:28:40,400 --> 00:28:42,400 Music 304 00:28:55,400 --> 00:29:00,400 Music 305 00:29:00,400 --> 00:29:05,400 Music 306 00:29:05,400 --> 00:29:10,400 Music 307 00:29:10,400 --> 00:29:15,400 Music 308 00:29:15,400 --> 00:29:20,400 Music