Glossary term: 类星体
Description: 类星体是类恒星射电源的简称，是遥远的河外射电源。类星体看起来像恒星（因此被称为“类星”体），最初是用射电望远镜探测到的。观测发现，类星体与星系中心质量最大的超大质量黑洞周围区域有关。类星体是活动星系核（AGN）的一个子类，后者还包括射电星系、塞弗特星系、耀变体和低电离星系核（LINERs）等。类星体的亮度可能达到其宿主星系的百倍以上。有些类星体还有巨大的喷流，与宿主星系周围和内部的气体相互作用。由于类星体具有高亮度，因此它们可用来研究遥远星系、居间星系和星系际介质。3C 273是第一个被探测到的类星体。
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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
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