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abstraction > mathematical concept > geometrical object > point > coordinate > local coordinate |
local coordinate comparison table |
Subject | has definition | is opposite of | has synonym | has azimuth | has antonym | has elevation |
---|---|---|---|---|---|---|
east point | The point on the celestial horizon 90° clockwise from the north point. At the equinoxes the Sun rises in the east point. | 90 | 0 | |||
nadir | The point on the celestial sphere diametrically opposite to the zenith in the direction of gravity. | zenith | downward | 0 | zenith | -90 |
north point | The point at which the meridian intersects the horizon below the north celestial pole. | 0 | 0 | |||
zenith | The point on the celestial sphere directly above the observer's head - i.e., opposite to the direction of gravity (nadir). | nadir | 0 | nadir | 90 |
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