| 单词 | 角距离 |
| 释义 | 〔longitude〕Angular distance on the earth's surface, measured east or west from the prime meridian at Greenwich, England, to the meridian passing through a position, expressed in degrees (or hours), minutes, and seconds.经线：地球表面的成角距离，从英国格林尼治的本初子午线向东或向西至经过某一点的子午线计量，以度（或小时）、分和秒表示〔azimuth〕The horizontal angular distance from a reference direction, usually the northern point of the horizon, to the point where a vertical circle through a celestial body intersects the horizon, usually measured clockwise. Sometimes the southern point is used as the reference direction, and the measurement is made clockwise through 360°.方位角，方位：从某一参考方向测量的地平线的角距离，通常指从地平线北端到通过天体和地平线相交的垂直的圆周上的某一点，一般顺时针测量。有时南部的点作为参考方向，以360°为标准做顺时针测量〔elongation〕The angular distance between two celestial bodies as seen from Earth.距角：从地球上看的两个天体之间的角距离〔depression〕The angular distance below the horizontal plane through the point of observation.俯角：从观察点看，在水平平面下的角距离〔heliometer〕A telescope equipped to measure small angular distances between celestial bodies.量日仪：一种望远镜，用以测量天体之间微小的角距离 |
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