Glossary term: 透镜状星系
Description: 透镜状一词用于描述具有透镜形状的天体。透镜状(S0或SB0)星系同时具备螺旋星系和椭圆星系的观测特征。透镜状星系看起来拥有类似于螺旋星系的盘状结构和中央凸起,但没有明显的螺旋臂;同时,它们主要由老年恒星组成,就像椭圆星系中占主导地位的恒星一样。透镜状星系的形成过程仍然是研究的热点,而已有一些证据表明,这些星系可能是由星系相互作用产生的结果。
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