Definition:West Point of Horizon

Definition

Let an observer $O$ be facing the north point of the horizon $N$, facing directly away from the south point of the horizon $S$.

Let the celestial equator meet the celestial horizon at the points $E$ and $W$.

Let $W$ be the point on the left of $O$.

This is called the west point of the horizon.

In the above diagram, the west point of the horizon is indicated by $W$.

Also known as

The west point of the horizon is also known as the west point.

Also see

• Definition:North Point of Horizon
• Definition:South Point of Horizon
• Definition:East Point of Horizon

Sources

• 1976: W.M. Smart: Textbook on Spherical Astronomy (6th ed.) ... (previous) ... (next): Chapter $\text {II}$. The Celestial Sphere: $19$. Declination and hour angle.
• 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.