WEBVTT FILE 1 00:00:00.367 --> 00:00:04.838 OSIRIS-REx is NASA's mission to explore asteroid Bennu. 2 00:00:04.838 --> 00:00:09.376 Its goal is to collect a sample of Bennu and return it to Earth. 3 00:00:09.376 --> 00:00:13.046 [ music ] 4 00:00:13.046 --> 00:00:16.016 To get to Bennu, OSIRIS-REx must first match the asteroid's 5 00:00:16.016 --> 00:00:17.851 orbital tilt. 6 00:00:19.186 --> 00:00:21.855 In September 2017, it will approach Earth 7 00:00:21.855 --> 00:00:23.957 for a gravity assist, 8 00:00:23.957 --> 00:00:27.928 bringing the spacecraft within 11,000 miles of home. 9 00:00:27.928 --> 00:00:39.306 [ music ] 10 00:00:39.306 --> 00:00:43.744 Following the flyby, OSIRIS-REx will look back at Earth. 11 00:00:43.744 --> 00:00:46.947 [ music ] 12 00:00:46.947 --> 00:00:50.784 It will take images and spectra of our world, 13 00:00:50.784 --> 00:00:53.553 calibrating its instruments so that they are ready 14 00:00:53.553 --> 00:00:55.322 to study Bennu. 15 00:00:55.322 --> 00:01:04.364 [ music ] 16 00:01:04.364 --> 00:01:07.501 The gravity assist will change OSIRIS-REx's orbital tilt 17 00:01:07.501 --> 00:01:08.835 by six degrees, 18 00:01:09.336 --> 00:01:13.807 sending it on a path to catch asteroid Bennu in 2018. 19 00:01:13.807 --> 00:01:17.010 [ music ] 20 00:01:17.010 --> 00:01:26.820 [ satellite beeping ] 21 00:01:28.121 --> 00:01:34.061 [ music ]