Glossary term: 哈雷彗星
Description: 哈雷彗星可以說是最著名的彗星，因為它是唯一一個肉眼可見的短週期彗星，且週期足夠短（約75年），使人們在一生中有機會見到它兩次。哈雷彗星上一次造訪是在1986年，預計將於2061年再次回歸。它以英國天文學家埃德蒙·哈雷的名字命名，他是第一個計算出該彗星週期並預測其下次回歸的科學家。哈雷注意到1531年、1607年和1682年出現的彗星軌道非常相似，推斷這些彗星其實是同一顆彗星多次造訪內太陽系。他成功預測了該彗星在1758年的回歸。
哈雷彗星曾被“織女星號”和“喬托號”探測器探訪。這些任務發現，彗星的塵埃主要由硅酸鹽、鐵和鎂組成，此外還含有碳氫氧氮化合物（CHON）。彗星的核心主要由冰構成。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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