WEBVTT FILE 1 00:00:00.020 --> 00:00:04.030 A total solar eclipse lets NASA researchers try out technology that could one day aid in the development of future missions. 2 00:00:04.050 --> 00:00:08.130 However, they must flawlessly complete the experiment in a few short minutes. 3 00:00:08.150 --> 00:00:12.140 Nat: The corona can be studied from 4 00:00:12.160 --> 00:00:16.290 ground based telescopes only during an eclipse. 5 00:00:16.310 --> 00:00:20.340 Whenever an eclipse happens, we make use of it and try to test some of our ideas. 6 00:00:20.360 --> 00:00:24.360 We have only 2 minutes to do the experiment 7 00:00:24.380 --> 00:00:28.370 and we have been preparing for maybe more 8 00:00:28.390 --> 00:00:32.390 than a year. Nelson: Nothing can go wrong. Your camera can't shut down. 9 00:00:32.410 --> 00:00:36.420 You can't press the wrong button. Because there is no time to change your mind 10 00:00:36.440 --> 00:00:40.510 or make an alternate decision. 11 00:00:40.530 --> 00:00:44.520 Nat: We are going to set up the telescope and observe the total solar eclipse 12 00:00:44.540 --> 00:00:48.560 at 4 different wavelengths. The images taken 13 00:00:48.580 --> 00:00:52.690 in these 4 different wavelengths will be used to 14 00:00:52.710 --> 00:00:56.710 determine the temperature and flow speed of the corona 15 00:00:56.730 --> 00:01:00.730 Nelson: We are taking these images using a polarization camera. Which will be a first for us 16 00:01:00.750 --> 00:01:04.760 I think it is the first for the solar physics community. 17 00:01:04.780 --> 00:01:08.780 Once the moon completely covers the sun, the experiment begins. 18 00:01:08.800 --> 00:01:12.880 It's my job to make sure the image is in the field of view. 19 00:01:12.900 --> 00:01:16.920 At the correct time, one 20 00:01:16.940 --> 00:01:20.950 person has to give the command to turn the filter wheel, 21 00:01:20.970 --> 00:01:25.120 and for each filter there is a different exposure time. 22 00:01:25.140 --> 00:01:29.140 Another person has to enter the exposure time. 23 00:01:29.160 --> 00:01:33.150 It's a combined effort of 6 different hands. No one 24 00:01:33.170 --> 00:01:37.170 person can make any errors. 25 00:01:37.190 --> 00:01:41.210 Nat: We do feel the pressure and also the excitement of the eclipse, but still we have 26 00:01:41.230 --> 00:01:45.230 to focus on our experiment. 27 00:01:45.250 --> 00:01:49.270 Nelson: It's a tense feeling, but I believe we will succeed. 28 00:01:49.290 --> 00:01:53.280 music 29 00:01:53.300 --> 00:01:57.330 tone 30 00:01:57.350 --> 00:02:01.370 beeping 31 00:02:01.390 --> 00:02:03.570 beeping