On September 26, 2022, NASA’s Double Asteroid Redirection Test (DART) spacecraft crashed into a binary asteroid system. By intentionally ramming a probe into the 160-meter-wide moonlet named Dimorphos, the smaller of the two asteroids, humanity demonstrated that the kinetic impact method of planetary defense actually works. The immediate result was that Dimorphos’ orbital period around Didymos, its larger parent body, was slashed by 33 minutes.
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据伊朗媒体3月4日报道，原定于4日晚在伊玛目霍梅尼清真寺开始举行的已故最高领袖哈梅内伊告别仪式被推迟，新的安排将随后通知。（新华社）。关于这个话题，PDF资料提供了深入分析
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