词条 星系棒
描述: 许多螺旋星系的中心区域都存在一个棒状结构。星系中心的大部分恒星、气体和尘埃都沿着这条笔直的棒状结构分布。星系的旋臂从这条棒状结构的外边缘开始。带有棒状结构的螺旋星系被称为棒旋星系。银河系被认为是一个棒旋星系。
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其他语言版本
- 阿拉伯语: الشريط المجري
- 德语: Galaktischer Balken
- 英语: Galactic Bar
- 法语: Barre galactique
- 意大利语: Barra galattica
- 韩语: 은하막대부
- 繁体中文: 星系棒
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A visible light image of the Andromeda Galaxy
图注： The Andromeda Galaxy viewed in visible light. Like our Milky Way, Andromeda is a barred spiral galaxy. Here we can see its bright core and spiral disk. The glow from the stars in the disk is interrupted by lanes of dust that form part of its spiral structure.
Andromeda is the largest galaxy in the Local Group of galaxies that includes the Milky Way.
To the left of the core and just above the disk we see the dwarf galaxy M32 and to the right and below the disk we see the dwarf galaxy M110. These are both satellite galaxies of the Andromeda Galaxy.
来源： Torben Hansen
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