碰触贝努小行星：影片
2020年11月3日 Tagging Bennu: The Movie Video Credit: OSIRIS-REx, NASA’s GSFC, U. Arizona, Lockheed Martin Explanation: This is what it looks like to punch an asteroid. Last month, NASA’s robotic spacecraft OSIRIS-REx descended toward, thumped into, and then quickly moved away from the small near-Earth asteroid 101955 Bennu. The featured video depicts the Touch-And-Go (TAG) sampling event over a three-hour period. As the movie begins, the automated probe approaches the 500-meter, diamond-shaped, space rock as it rotates noticeably below. About 20 seconds into the video, Nightingale comes into view — a touchdown area chosen to be relatively flat and devoid of large boulders that could damage the spaceship. At 34 seconds, the shadow of OSIRIS-REx’s sampling arm suddenly comes into view, while very soon thereafter rocks…