WEBVTT FILE 1 00:00:00.000 --> 00:00:02.135 (music throughout) After its discovery in 1999 2 00:00:02.135 --> 00:00:04.471 Our first hints of what asteroid Bennu looked like 3 00:00:04.471 --> 00:00:06.806 came from the Arecibo Observatory. 4 00:00:06.806 --> 00:00:11.111 Then, as the OSIRIS-REx spacecraft made its way to Bennu, the asteroid grew in detail 5 00:00:11.111 --> 00:00:18.718 from a few tiny pixels to a surprisingly rugged world, littered with giant boulders. 6 00:00:18.718 --> 00:00:23.390 OSIRIS-REx arrived at the asteroid on December 3, 2018, and began 7 00:00:23.390 --> 00:00:34.000 surveying the asteroid for the years leading up to the Touch-and-Go sample collection event 8 00:00:34.000 --> 00:00:38.071 The spacecraft discovered boulders the size of buildings, 9 00:00:38.071 --> 00:00:42.142 and imaged the surface down to 5 centimeter per pixel resolution. 10 00:00:42.142 --> 00:00:46.479 While observing Bennu, we made some unexpected discoveries. 11 00:00:46.479 --> 00:00:50.316 OSIRIS-REx spotted pieces of rocky ejecta bursting off Bennu and into space. 12 00:00:50.316 --> 00:00:56.790 The spacecraft was able to observe the entire lifecycle of a natural satellite ejecting off an object, 13 00:00:56.790 --> 00:01:00.660 entering into orbit, and returning back to the surface. 14 00:01:00.660 --> 00:01:04.664 OSIRIS-REx caught a glimpse of a black hole 30,000 light years away. 15 00:01:04.664 --> 00:01:09.736 The discovery was made by an instrument about the size of a shoebox called REXIS 16 00:01:09.736 --> 00:01:12.772 the Regolith X-Ray Imaging Spectrometer. 17 00:01:12.772 --> 00:01:19.646 It detected X-rays radiating from a point off the asteroid’s edge. 18 00:01:19.646 --> 00:01:24.684 OSIRIS-REx has imaged Bennu better than we have Earth and our own Moon. 19 00:01:24.684 --> 00:01:28.121 Using this extremely high-resolution data, we have been able to create 20 00:01:28.121 --> 00:01:30.623 stunning visualizations of the surface of the asteroid. 21 00:01:30.623 --> 00:01:36.362 We used imagery from the Nightingale sample site to created a 360/VR visualization of the rugged terrain. 22 00:01:36.362 --> 00:01:39.499 Using an extensive catalogue of surface imagery, OSIRIS-REx 23 00:01:39.499 --> 00:01:43.570 navigated itself autonomously down to the surface for sample collection. 24 00:01:43.570 --> 00:01:46.773 It used software called Natural Feature Tracking to match up landmarks 25 00:01:46.773 --> 00:01:52.545 with its catalogue to ensure it was on the right track. 26 00:01:52.545 --> 00:01:55.782 Approximately 200 million miles away from Earth, 27 00:01:55.782 --> 00:02:00.520 the spacecraft performed a series of burns to navigate itself to the rocky surface. 28 00:02:00.520 --> 00:02:03.923 At 6:08 pm eastern on October 20, 2020, 29 00:02:03.923 --> 00:02:10.230 OSIRIS-REx successfully tagged sample site Nightingale within one meter of its targeted location 30 00:02:10.230 --> 00:02:19.672 The onboard cameras captured incredible footage of the Touch-and-Go Sample Acquisition Mechanism (TAGSAM) contacting the surface. 31 00:02:19.672 --> 00:02:25.178 Imagery from SamCam showed rocks and dust overflowing from the TAGSAM head. 32 00:02:25.178 --> 00:02:27.680 The team is confident they’ve exceeded the mission requirement 33 00:02:27.680 --> 00:02:36.189 of collecting at least 60 grams of material, and on October 29th, 2020, they stowed the sample for return to Earth. 34 00:02:36.189 --> 00:02:40.727 OSIRIS-REx imaged Bennu for the last time on April 7th, 2021 35 00:02:40.727 --> 00:02:48.902 and departed the asteroid on May 10th on its two-year journey to deliver the sample to Earth.