Description: 当天体进入另一天体的阴影中或另一天体从观测者和天体之间经过时，天体会暂时被遮挡，这就是“食”现象。月食是指地球位于太阳和月球之间，月球进入地球的阴影中导致的“食”现象；日食是指月球进入地球和太阳之间，遮挡了部分或全部太阳光导致的“食”现象。如果遮挡天体只遮挡了其他天体的一小部分，这种现象被称为“凌”。如果遮挡天体完全遮住了另一个天体，这种现象称为“掩”。

Related Terms:

• 月食
• 日食
• 凌
• 掩星
• 阴影

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".