词条 暗星云
描述: 暗星云是太空中由气体和尘埃组成的冷云，它阻挡了来自其后面的恒星和明亮星云的大部分光线，因此看起来很暗。尽管尘埃仅占星云中物质的1%，但正是尘埃阻挡了来自后面的光线。暗星云会阻挡可见光和紫外线，但通过红外线还是可以看到它们。最著名的例子就是猎户座的马头星云。
相关词条
用其他语言查看该词条
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: السديم المظلم
- 德语: Dunkelnebel
- 英语: Dark Nebula
- 法语: Nébuleuse sombre
- 意大利语: Nebulosa Oscura
- 日语: 暗黒星雲 (外部链接)
- 韩语: 암흑성운
- 繁体中文: 暗星雲
相关媒体
Dust Clouds and Nebulae near R Coronae Australis
图注： The image shows a dark and dusty cloud and some bright reflection nebulae near the binary star R Coronae Australis. The dark cloud spans several light-years and is located in the constellation Corona Australis near the constellation Sagittarius, in the direction of the Milky Way's center. The cloud appears to swallow the light of distant stars behind it as the dust particles in it scatter light passing through in all directions. This gives it the appearance of a void in the sky. This dark nebula is part of the broader Corona Australis Molecular Clouds. R Coronae Australis forms part of the Coronet Cluster, a collection of young stars which formed at some point in the last two million years.
Around R Coronae Australis in the center of the image is the small reflection nebula NGC 6729 with two blueish reflection nebulae NGC 6726 and NGC 6727 lying to the upper right of it. In these nebulae the dust scatters light from bright stars near the nebula towards an observer on Earth, making it glow in this image.
来源： ESO
来源链接
