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.