Glossary term: 周日运动
Description: “周日”指的是每日的现象。在地球上，它指的是由于地球自转，天空中的恒星和其他天体看起来从东向西移动。这种表观运动的轴与地球的自转轴重合。周日圈是恒星随着天球在天空中移动所形成的路径。在夜空的长时间曝光照片中，这些路径会呈现出以南北天极为中心的弧形或圆形轨迹，称为恒星轨迹。对于其他行星上的观察者，由于该行星的自转轴和自转周期不同，恒星和其他天体在天空中描绘的路径也会有所不同。
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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".
