英语词汇“barred spiral galaxy, SB galaxy”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	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。
随便看	reform of the economic system reform of the educational system Reform of the Education Department reform of the entrance exam reform of the equity division reform of the examination Reform of the experiment teaching reform of the financial sector/system reform of the financial system reform of the government reform of the headman system reform of the higher education reform of the household registration system reform of the house system reform of the housing system reform of the international monetary payment reform of the international monetary system reform of the investment and financing systems reform of the journals reform of the judicature reform of the judicial system reform of the labour system reform of the library reform of the match system reform of the medical and healthcare system