词条 盘状星系
描述: 盘状星系是一类星系，其特征是拥有一个由恒星、气体和尘埃组成的扁平结构，这些成分都围绕星系中心做共面圆周运动。盘状星系中通常存在螺旋臂及相关的恒星形成活动。在大多数星系分类体系中，盘状星系与椭圆星系、不规则星系和矮星系有所区别。
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词条和定义状态： 该术语的英文原始定义已通过天文研究人员和教师的审核 该术语及其定义的译文仍待审核
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
If you notice a factual or translation error in this glossary term or definition then please get in touch.
其他语言版本
- 阿拉伯语: المجرة القرصية
- 德语: Scheibengalaxie
- 英语: Disk Galaxy
- 法语: Galaxie à disque
- 意大利语: Galassia a disco
- 日语: 円盤銀河 (外部链接)
- 韩语: 원반은하
- 巴西葡萄牙语: Disco Galaxy
- 繁体中文: 盤狀星系
相关媒体
草帽星系
图注： 由于这个著名的星系M104 与墨西哥帽子非常相似，因此经常被称为 "草帽星系"。它之所以看起来是这个样子，是由于我们观测的视角几乎平行于薄盘的平面，薄盘/星系盘 被星系的核球所照亮。星系盘和核球都含有恒星，但核球中的恒星往往比较老。星系盘中蕴含有大量的尘埃和气体，从而形成了阴影。M104 位于室女座，距离我们大约 50 光年。图中可见的小点有些是前景恒星，有些是背景星系，但实际上大部分都是球状星团，它们是与草帽星系相关的致密大质量恒星团。
来源： ESO/P.巴特尔
来源链接
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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The Lenticular Galaxy NGC 2787
图注： The lenticular galaxy NGC 2787. This galaxy is a disk galaxy but lacks the large, dominant spiral arm structure seen in the disks of spiral galaxies. Its core is very bright compared to the core of a spiral galaxy. Thin rings of dust can be seen in the galaxy's disk.
来源： NASA/ESA and The Hubble Heritage Team
来源链接
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