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星系盘

玉夫座星系(NGC 253)是星系盘的一个例子

星系盘圆盘星系,例如螺旋星系透镜星系的一部分。

星系盘是存在于包含螺旋、棒状等圆盘星系盘状物的平面部分。星系盘倾向于比核球和晕有着更多的气体、尘埃和年轻的恒星。

星系盘的主要成分是气体、尘埃和恒星。星系盘的气体和尘埃元件称为气体盘,恒星为元件组成的星系盘称为恒星盘

星星不一致的轨道速度

没人注意到多数星系盘中恒星的轨道速度与依据星系发光物质质量计算的结果不一致。针对这个问题的一个可能解释是不发光的暗物质

相关条目

进阶读物


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星系盘
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