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July 22, 2021
Uncategorized

NASA探測器成功降落小行星貝努 將採塵土樣本

美國太空總署(NASA)的太空探測器奧西里斯-REx號(OSIRIS-REx),在美東時間週二傍晚6時,成功登陸小行星貝努(Bennu)表面,完成採集樣本任務,並離開小行星表面。

NASA在6時11分在社交網站Twitter發文,宣布奧西里斯-REx已成功着陸,隔1分鐘左右,再貼文表示探測器已飛離小行星表面。7分鐘後的貼文則稱,探測器已按計劃成功採集樣本,預定在2023年9月24日返抵地球。

按計劃,奧西里斯-REx是在貝努北半球的岩石區域登陸,伸出機械臂接觸地面並噴出氣流吹起塵土,然後收集大約60克塵土樣本,整個過程只需5至10秒。NASA正建設用於研究貝努樣本的實驗室,未來將與日本交換小行星「龍宮」的樣本。

貝努位於火星和地球之間,距離地球3.34億公里,是一顆呈陀螺狀的含碳小行星,平均直徑是492米,大小如同美國帝國大廈。科學家一直希望取得其樣本,進一步了解太陽系的形成與演化,包含行星形成初期階段,以及導致地球上生命形成有機化合物的來源,亦希望可以研究出如何避免小行星撞擊地球。

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