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Glossary term: 小行星带

Also known as Main Asteroid Belt

Description: 小行星带位于火星和木星之间的区域;围绕该区域运行的是矮行星谷神星和大量主要由岩石和一些矿物组成的小型小行星。小行星带被称为主小行星带,以便将其与太阳系中发现的其他小天体(即近地天体和特洛伊群)区分开来。

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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

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Related Media


小行星谷神星大致呈球形,表面呈灰色,布满陨石坑,其中一些陨石坑暴露出白色的地下水冰。

谷神星

Caption: 这是一张由“黎明号”探测器在2015年5月在13641公里的距离拍摄的小行星谷神星的真彩色图像。右侧醒目的明亮陨石坑是豪拉尼(Haulani)陨石坑,其左侧较小的亮点位于奥克索(Oxo)陨石坑的底部。来自这些撞击的喷出物似乎暴露出明亮的物质,可能是水冰。
Credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA / Justin Cowart

License: CC-BY-2.0 Creative Commons Attribution 2.0 Generic icons


小行星艾达是灰色的,形状像一个土豆,有很多浅坑。它的卫星达克提尔比它小 40 倍。

伊达和达克提尔

Caption: 这张伊达小行星及其卫星达克提尔的照片是伽利略太空探测器于 1993 年 8 月在距其 10,870 公里(6,755 英里)的距离上拍摄的。艾达小行星是火星和木星之间的主小行星带中一颗陨石坑严重、形状不规则的小行星。这张图片证明,像伊达这样大 56 千米的小行星也可以拥有自己的卫星。
Credit: NASA/JPL credit link

License: PD Public Domain icons