描述: 星系团是由具有引力束缚的星系组成的天体集合。星系团的大小和集中程度各不相同，包含的星系从数百个到数千个不等。例如，离我们最近的室女座星系团就是一个包含数千个星系的大型星系团。除了星系，星系团还包含等离子体和大量暗物质。

相关词条

• 暗物质
• 银河系
• 等离子体

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该术语及其定义的译文仍待审核

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