Glossary term: 天极
Description: 南北两天极被定义为地球自转轴与天球的交点。
在地球的北极,北天极总是在正上方;而在地球的南极,南天极总是在正上方。由于地球自转,北半球的天空似乎围绕着北天极旋转,而南半球的天空似乎围绕着南天极旋转。北天极的赤纬为+90度,而南天极的赤纬为-90度。
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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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