Glossary term: 卫星
Description: 卫星是围绕行星、矮行星或小行星等较小天体运行的天体。地球有一颗卫星，叫做月球。太阳系的大多数行星都有卫星，但水星和金星没有。矮行星冥王星有几颗卫星，少数其他矮行星和小行星也有卫星。这里的卫星是指天然卫星，用于通信或科学目的的人造卫星不属于此类。
许多卫星是在围绕行星、矮行星或其他天体的轨道上形成的。人们认为，月球是在太阳系形成的早期阶段，由地球和一颗行星发生大碰撞后，由抛射出的物质形成并围绕地球运行的。其他许多卫星（大多较小）都是小行星，它们被所环绕天体的引力俘获。
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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
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
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License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons
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License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons
Tags:
Art
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Age Ranges:
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Education Level:
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Costs:
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