Glossary term: 天球
Description: 天球是一个假想的空心球壳,其半径无限大,可以地球、太阳或任何便利的地方为中心。在表观上,天体附着在天球内部,而行星、太阳和月球在天球上缓慢移动。天球这一概念被用于球面坐标系。
由于地球的自转,天球在表观上每天转动一周。
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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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