西佛星系

西佛星系（Seyfert galaxies）是一类旋涡星系或者不规则星系，拥有非常亮的星系核。名字来自20世纪40年代深入研究这类星系的天文学家卡尔·基南·西佛（Carl Keenan Seyfert）。西佛星系属于活跃星系核的一类。

单词	Seyfert galaxy
释义	Seyfert galaxy 中文百科西佛星系西佛星系（Seyfert galaxies）是一类旋涡星系或者不规则星系，拥有非常亮的星系核。名字来自20世纪40年代深入研究这类星系的天文学家卡尔·基南·西佛（Carl Keenan Seyfert）。西佛星系属于活跃星系核的一类。英语百科 Seyfert galaxy 西佛星系 Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.
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Seyfert galaxy