词条 光球
描述: 光球层（”光球“）是恒星的某一层，我们观测到的光就是从这里发出的。从更深、密度更大的层发出的光在逃离恒星之前就会被吸收。而较高的层密度较小，不会发出明显的光。
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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".
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其他语言版本
- 阿拉伯语: الغلاف الضوئي
- 德语: Photosphäre
- 英语: Photosphere
- 法语: Photosphère
- 意大利语: Fotosfera
- 日语: 光球 (外部链接)
- 韩语: 광구
- 繁体中文: 光球
相关媒体
太阳表面的高分辨率图像
图注： 这张高分辨率图像展现了太阳最外层可见"表面"（光球层）的一小片区域，覆盖面积达36,500×36,500公里。它是丹尼尔·井上建太阳望远镜在科学验证阶段拍摄的首批图像之一。图中每个网状结构的尺寸约相当于美国得克萨斯州、法国、阿富汗或索马里的国土面积。在较亮的网状中心区域，来自太阳内部深处的等离子体上升至表面，冷却后沿着划分网状结构的暗色缝隙下沉。这些暗色条纹中还能观察到微小而明亮的磁标记点。
来源： NSO/NSF/AURA
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Close-up view of a sunspot
图注： This image of a sunspot was taken by the Daniel K Inouye Solar Telescope (DKIST), operated by the U.S. National Science Foundation. It was taken only in light with a wavelength of 530 nanometers, within the greenish-yellow part of the visible spectrum.
The picture reveals the detail of the spot's structure and the Sun’s photosphere. The dark central region, known as the umbra, is surrounded by a lighter area called the penumbra with radially elongated features stretching towards the umbra. Note that the umbra and penumbra here are not the same as the umbra and penumbra that occur during an eclipse.
The sunspot measures approximately 5000 kilometres in diameter, roughly equivalent to the east-west span of China. While the umbra appears black, it is actually hot and bright. It only appears dark because it is a few thousand kelvin cooler than the surrounding solar photosphere. Surrounding the sunspot, granulation patterns of plasma are visible on the photospheric surface of the Sun.
来源： NSO/NSF/AURA
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