1 00:00:00,020 --> 00:00:04,030 [slate] 2 00:00:04,050 --> 00:00:08,100 A supermoon is quite easily the 3 00:00:08,120 --> 00:00:12,170 closest full moon of the year. As we know, the moon's orbit around the 4 00:00:12,190 --> 00:00:16,300 Earth is not a perfect circle. And so sometimes it's closer 5 00:00:16,320 --> 00:00:20,490 to the Earth and sometimes it's further away. And when we get both a full moon and the closest 6 00:00:20,510 --> 00:00:24,560 approach of the moon to the Earth, we get a supermoon. 7 00:00:24,580 --> 00:00:28,660 This is going to be a particularly important supermoon because it'll be the closest the moon has been to the Earth since January 8 00:00:28,680 --> 00:00:32,770 of 1948. And so it should be a spectacular show. 9 00:00:32,790 --> 00:00:36,810 [slate] 10 00:00:36,830 --> 00:00:40,960 You don't have to be out in any particular instant in time to see 11 00:00:40,980 --> 00:00:45,030 this. So any clear night over the weekend and into early next 12 00:00:45,050 --> 00:00:49,150 week you'll be able to see a full moon that's going to be brighter and larger 13 00:00:49,170 --> 00:00:53,320 than the average full moon. The supermoon which itself happens on Monday 14 00:00:53,340 --> 00:00:57,370 will appear to be about 14 percent larger and 30 percent 15 00:00:57,390 --> 00:01:01,410 brighter than the smallest full moon that we get. So really anytime at night 16 00:01:01,430 --> 00:01:05,490 if it's clear, you'll get a spectacular show and you'll get to see our beautiful moon 17 00:01:05,510 --> 00:01:09,520 in the sky. 18 00:01:09,540 --> 00:01:13,700 [slate] Over the seven 19 00:01:13,720 --> 00:01:17,740 years of the life of the LRO mission we've learned a lot about the moon. And I think for me 20 00:01:17,760 --> 00:01:21,800 one of the biggest surprises is how dynamic the moon is. 21 00:01:21,820 --> 00:01:25,890 That we're able to measure the changes that have occurred on the lunar surface 22 00:01:25,910 --> 00:01:30,040 as a result of impact craters that have formed. And that constant bombardment of 23 00:01:30,060 --> 00:01:34,230 the lunar surface actually erodes the surfaces quite faster than we expected 24 00:01:34,250 --> 00:01:38,250 before. Before LRO we thought that the boot prints that the astronauts left 25 00:01:38,270 --> 00:01:42,340 on the moon during the Apollo program would be around for millions of years. 26 00:01:42,360 --> 00:01:46,480 And recent results from LRO show that those boot prints may be erased 27 00:01:46,500 --> 00:01:50,630 much faster, over several tens of thousands of years. So we're learning the moon 28 00:01:50,650 --> 00:01:54,700 is a much more changing place, much more dynamic place than we ever imaged 29 00:01:54,720 --> 00:01:58,730 before. [slate] 30 00:01:58,750 --> 00:02:02,830 [slate] One of the great things about 31 00:02:02,850 --> 00:02:06,970 the moon is that we use it, our understanding of the moon as a cornerstone 32 00:02:06,990 --> 00:02:11,150 for understanding all of the other objects in the solar system. So for instance when we got the 33 00:02:11,170 --> 00:02:15,220 beautiful images of Pluto, we learned that the surface of Pluto has areas that are 34 00:02:15,240 --> 00:02:19,330 very smooth, that have little impact craters on them. Or few impact craters on them. 35 00:02:19,350 --> 00:02:23,470 And so one of the things that we can do is estimate the ages of those surfaces. 36 00:02:23,490 --> 00:02:27,550 It turns out that Pluto has very young surfaces. And the reason that we know that is because of our 37 00:02:27,570 --> 00:02:31,590 studies of the moon. So for any object in the solar system, the basis of 38 00:02:31,610 --> 00:02:35,680 our understanding comes from our knowledge of the moon. And so our continued studying 39 00:02:35,700 --> 00:02:39,800 of the moon tells us more about not only how the moon has evolved, but also how all of the 40 00:02:39,820 --> 00:02:43,820 solar system objects have evolved. 41 00:02:43,840 --> 00:02:48,020 [slate] 42 00:02:48,040 --> 00:02:52,070 To learn more about the LRO mission, you can go to NASA.gov/LRO. 43 00:02:52,090 --> 00:02:56,140 Follow us on Twitter @LRO_NASA. 44 00:02:56,160 --> 00:03:00,230 And of course you can also post pictures of the supermoon using the hashtag 45 00:03:00,250 --> 00:03:02,562 #NASASupermoon.