释义 |
Zenith distance Translationszenith distance
zenith distance[′zē·nəth ‚dis·təns] (astronomy) Angular distance from the zenith; the arc of a vertical circle between the zenith and a point on the celestial sphere, measured from the zenith through 90°, for bodies above the horizon. Also known as co-altitude. zenith distance (ZD) The angular distance through the arc of a vertical circle between the zenith and a point on the celestial sphere, measured from the zenith through 90°, for bodies above the horizon. Also known as co-altitude.See ZD See ZEN DIST |