Glossary term: 米粒組織
Description: 在太陽的外層區域，炙熱的氣體流體上升、膨脹並冷卻，隨後下沉。這種對流過程發生在每個大約1500公里寬的獨立單元內。每個單元中央升起的熱物質比邊緣下沉的冷物質更亮，因此形成了中心明亮、邊緣較暗的圖案，稱為米粒。這些米粒是暫時的現象，每個米粒僅持續幾分鐘，隨後便被太陽內部沸騰的對流氣流所擾亂。
See this term in other languagesTerm and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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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In Other Languages
- 阿拉伯語: حبيبات الشمس
- 德語: Granulation
- 英語: Granulation
- 法語: Granulation
- 義大利語: Granulazione
- 日語: 粒状斑 (external link)
- 尼泊爾語: कणिकीकरण
- 巴西葡萄牙語: Granulação
- 簡體中文: 米粒组织
Related Media
太陽表面的高分辨率圖像
Caption: 這張高分辨率圖像展現了太陽最外層可見"表面"（光球層）的一小片區域，覆蓋面積達36,500×36,500公里。它是丹尼爾·井上建太陽望遠鏡在科學驗證階段拍攝的首批圖像之一。圖中每個網狀結構的尺寸約相當於美國得克薩斯州、法國、阿富汗或索馬裡的國土面積。在較亮的網狀中心區域，來自太陽內部深處的等離子體上升至表面，冷卻後沿著劃分網狀結構的暗色縫隙下沉。這些暗色條紋中還能觀察到微小而明亮的磁標記點。
Credit: NSO/NSF/AURA
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License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons
Close-up view of a sunspot
Caption: 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.
Credit: NSO/NSF/AURA
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License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons
