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Glossary term: 月食

Description: 当月球进入地球的阴影时，就会发生月食。只有当地球位于太阳和月球之间，并且太阳、地球和月球几乎排成一列直线时，才会发生。因此，月食只能发生在满月之夜。当月球完全进入地球的阴影之中时，发生的是月全食。当月球仅有一部分被地球阴影覆盖时，发生的是月偏食。月食的类型和持续时间，取决于月食发生时月球在其绕地球公转轨道上的精确位置。

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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

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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两位天文学家正在观测月食。在多云的天空中，在他们之间，一连串明亮的圆圈勾勒出一条弯曲的轨迹。

我们之间的日食，作者穆罕默德·雷汉，印度尼西亚

Caption: 2021年国际天文学联合会教育办公室天文摄影大赛月全食类别的第二名。 月全食是一种相当壮观的天文现象，无论是否使用望远镜都可以轻松观测到。这里展示的是2018年1月31日在印度尼西亚拍摄的月全食各个阶段：从满月进入地球圆形本影的开始，到全食阶段呈现的“血月”，再到月亮开始离开地球本影直至月落。
Credit: 穆罕默德·雷汉/国际天文学联合会教育办公室

License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons


The Moon behind jagged, snowy mountains. The lower two thirds of the Moon are darker and redder than the upper third

The eclipsed Moon sets near the Rochetta di Prendera, Dolomiti Unesco, by Alessandra Masi, Italy

Caption: First place in the 2021 IAU OAE Astrophotography Contest, category Total lunar eclipse. A lunar eclipse occurs when the full moon moves into the Earth`s shadow. This is the case when the Sun, Earth and Moon are exactly or very closely aligned. The reddish light reflected from the lunar surface is caused by sunlight that has been refracted on its way through Earth´s atmosphere in the direction of the Moon. It appears reddish because of the Rayleigh scattering of bluer light. The round shape of the Earth's shadow visible on the lunar surface was a proof for Aristotle that the Earth must be a sphere. This photo shows the eclipsed Moon that sets near the Rochetta di Prendera, Dolomiti Unesco, Italy, on 21 January 2019.
Credit: Alessandra Masi/IAU OAE

License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons

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