Glossary term: 银河系
Description: 星系是一个由恒星和其他物质成分（如暗物质、气体和尘埃）受到引力约束组成的系统，通常与邻近星系相隔数十万光年。星系有各种不同的形状和大小。最小的星系可能只有几千颗恒星，而最大的星系可能有几十万亿颗恒星。“The Galaxy“ 或首字母大写 ”Galaxy" 通常是指我们的银河系，它大约有 1000-4000亿颗恒星。
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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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