WEBVTT FILE 1 00:00:00.020 --> 00:00:04.010 [slate] 2 00:00:04.030 --> 00:00:08.030 [slate] 3 00:00:08.050 --> 00:00:12.110 So a supermoon 4 00:00:12.130 --> 00:00:16.240 is the closest full moon of the year. Now what makes this particular supermoon 5 00:00:16.260 --> 00:00:20.300 coming up this weekend so special is that it's going to be the closest full moon 6 00:00:20.320 --> 00:00:24.470 we've that had since 1948. So it's an opportunity to go out and see a 7 00:00:24.490 --> 00:00:28.490 beautiful show in the night sky. 8 00:00:28.510 --> 00:00:32.620 [slate] 9 00:00:32.640 --> 00:00:36.690 The best time to see the supermoon is really anytime over the weekend and early into next 10 00:00:36.710 --> 00:00:40.860 week. As long as it's clear out, you're away from 11 00:00:40.880 --> 00:00:44.910 tall buildings, trees and the sun has gone down 12 00:00:44.930 --> 00:00:49.000 the moon will be up in the sky. You can go out and see the supermoon. 13 00:00:49.020 --> 00:00:53.120 There's no one moment in time that you have to be outside. So if it's cloudy Saturday night 14 00:00:53.140 --> 00:00:57.270 definitely try to go out Sunday night and see it. Or even into Monday night. What will make this 15 00:00:57.290 --> 00:01:01.330 supermoon so special is that because it's going to be close, we'll have, it'll be a 16 00:01:01.350 --> 00:01:05.380 14 percent larger than the smallest full moon. but also 30 percent 17 00:01:05.400 --> 00:01:09.470 brighter than the smallest full moon. So you'll see this bright, beautiful show in the show. 18 00:01:09.490 --> 00:01:13.500 [slate] 19 00:01:13.520 --> 00:01:17.670 One of the biggest surprises 20 00:01:17.690 --> 00:01:21.890 coming back from the Lunar Reconnaissance Orbiter mission - LRO - is that 21 00:01:21.910 --> 00:01:25.970 we're able to detect the changes that are occurring on the lunar surface that are occurring essentially 22 00:01:25.990 --> 00:01:30.070 today, or over the last seven years. We're seeing new impact craters that are 23 00:01:30.090 --> 00:01:34.250 forming across the lunar surface. Now the effect of these new impact craters is to 24 00:01:34.270 --> 00:01:38.280 erase surface features. And so the boot prints that were left by the Apollo astronauts 25 00:01:38.300 --> 00:01:42.370 over 45 years ago are being erased at a rate much faster than we 26 00:01:42.390 --> 00:01:46.430 expected before. Before LRO we thought they'd be around for millions of years. And it turns out 27 00:01:46.450 --> 00:01:50.580 they're be erased after several tens of thousands of years. And so one of the things 28 00:01:50.600 --> 00:01:54.770 that we're learning is the moon is a much more dynamic place than we knew before. And for that 29 00:01:54.790 --> 00:01:58.810 reason it's a fascinating place. 30 00:01:58.830 --> 00:02:02.840 [slate] 31 00:02:02.860 --> 00:02:07.000 One of the amazing things that we've learned recently especially for 32 00:02:07.020 --> 00:02:11.040 places like Pluto is that surfaces of planets are very dynamic. 33 00:02:11.060 --> 00:02:15.080 We never expected that Pluto would have smooth surfaces that appear to be very young. 34 00:02:15.100 --> 00:02:19.190 And the reason that we think those surfaces are so young is because we've been to the moon. 35 00:02:19.210 --> 00:02:23.340 We use our understanding the moon to apply that knowledge across the solar system. So whether you're looking at 36 00:02:23.360 --> 00:02:27.410 Pluto or Mercury, our knowledge of the moon informs how we understand how planets 37 00:02:27.430 --> 00:02:31.450 work. 38 00:02:31.470 --> 00:02:35.560 [slate] To learn more 39 00:02:35.580 --> 00:02:39.710 about LRO you can go to NASA.gov/LRO. Of course you can also follow us 40 00:02:39.730 --> 00:02:43.750 on Twitter @LRO_NASA. And please post your pictures 41 00:02:43.770 --> 00:02:47.381 of the supermoon using hashtag #NASAsupermoon.