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Glossary term: 木衛一，音譯為艾奧

Description: 木衛一是圍繞木星運行的一顆衛星，由伽利略·伽利萊於1610年發現。它是木星四顆最大的衛星中距離木星最近的一個。木衛一每42.5小時繞木星運行一週，距離木星約422,000公里。由於在繞木星運行時受到強烈的潮汐力作用，木衛一表面有許多活躍的火山。

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Term 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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License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons


有著彩色水平雲帶的木星。木衛一的陰影在左上方顯示為一個黑色圓圈。

木星、木衛一及其陰影，作者：Ralf Burkart，德國

Caption: 2021 年國際天文學聯合會 OAE 天體攝影比賽伽利略衛星類第一名。 這幅木星的延時攝影是於2017 年從德國拍攝的，作品精美地展示了伽利略衛星之一木衛一在木星前的凌星現象。由於這只是衛星在行星上投下影子，因此相當於從更遠的地方觀測地球上的月食。雖然衛星的影子從一開始就清晰可見，但在木星美麗的大氣帶背景下，第一次觀看視頻時可能很難發現衛星本身。反復觀看可以欣賞到這一奇妙的快速運動和旋轉過程。
Credit: Ralf Burkart/IAU OAE

License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons


木衛一大致呈球形。它的表面主要由淡黃色的硫化物和較小的暗色火山組成。

伊奧衛星

Caption: 美國國家航空航天局的伽利略號航天器於1999年7月3日獲得了木星衛星木衛一的最高分辨率圖像。木衛一是伽利略-伽利雷 1610 年發現的四顆衛星之一。木衛一的顏色源於硫化物，是大量火山活動存在的證據。木星和鄰近衛星的潮汐力是木衛一火山活動的原因。
Credit: 美國宇航局/JPL/亞利桑那大學 credit link

License: PD Public Domain icons

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License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons

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The Office of Astronomy for Education is hosted by the Haus der Astronomie on the campus of the Max Planck Institute for Astronomy in Heidelberg. The Office of Astronomy for Education is an office of the International Astronomical Union, with substantial funding from the Klaus Tschira Foundation and the Carl Zeiss Foundation. The Shaw-IAU Workshops on Astronomy for Education
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