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单词 Dwarf spheroidal galaxies
释义

Dwarf spheroidal galaxies

中文百科

矮椭球星系 Dwarf spheroidal galaxy

(重定向自Dwarf spheroidal galaxies)

矮椭球星系dSph)是天文学的术语,原本是用在9个属于银河系和仙女座星系的卫星星系的低光度矮椭圆星系。

近年来,越来越多的证据显示大多数矮椭球星系的特性不同于椭圆星系,反而和不规则星系和晚期的螺旋星系较为相似,这个名词已经用于有这些性质的所有星系。

根据最佳的证据,这一类型的星系在宇宙中是最普遍的。(虽然它们的光度不足以占有优势。)

英语百科

Dwarf spheroidal galaxy 矮椭球星系

(重定向自Dwarf spheroidal galaxies)
NGC 147, a dwarf spheroidal galaxy of the Local Group

A dwarf spheroidal galaxy (dSph) is a term in astronomy applied to low luminosity galaxies that are companions to the Milky Way and to the similar systems that are companions to the Andromeda Galaxy (M31). While similar to dwarf elliptical galaxies in appearance and properties such as little to no gas or dust or recent star formation, they are approximately spheroidal in shape, generally lower luminosity, and are recognized only as satellite galaxies in the Local Group.

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更新时间:2025/6/17 0:41:06