英语词汇“barred spiral galaxy, SB galaxy”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典-复社网

单词	barred spiral galaxy, SB galaxy
释义	barred spiral galaxy, SB galaxy 棒旋星系; 有棒状结构贯穿核球的旋涡星系，以符号“SB”表示, 以别于正常旋涡星系S 。其旋臂始于棒的两端。按旋臂开展程度和核球相对于盘的大小分为SBa ， SBb和SBc 三个次型。SBa 旋臂缠绕最紧，核球相对最大；SBc 旋臂最舒展，核球相对最小。
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