Glossary term: 方位角
Description: 在水平坐标系中，方位角指的是物体所在的方向（沿地平线的角度）。方位角以度为单位，从正北向正东方向测量。方位角的数值范围覆盖完整的圆周，从0度到360度。换句话说，如果在天球上画一条从天体到地平线并垂直于地平线的假想弧线，方位角会告诉你这条弧线与地平线相交的位置。一个位于正北的天体，其方位角为0度；位于正东的天体，其方位角为90度，依此类推。在一些国家使用的较早的教科书中，方位角的测量方式是从正南开始，向西测量。因此，在这些教科书中的方位角数值会比现代标准的方位角值偏移180度。
Related Terms:
See this term in other languages
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".
