Definition:North Point of Horizon
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Definition
The point on the celestial horizon through which the principal vertical circle passes is called the north point of the horizon.
In the above diagram, the north point of the horizon is indicated by $N$.
Also known as
The north point of the horizon is also known as the north point.
Also see
Sources
- 1976: W.M. Smart: Textbook on Spherical Astronomy (6th ed.) ... (previous) ... (next): Chapter $\text {II}$. The Celestial Sphere: $18$. Altitude and azimuth.
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): cardinal points: 2.
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): cardinal points: 2.