Definition:Celestial Horizon/Also known as

Celestial Horizon: Also known as

The celestial horizon is also known just as the horizon, and as such is used in common parlance to mean as far as can be seen, figuratively as well as literally.

However, the word horizon has multiple uses, so on $\mathsf{Pr} \infty \mathsf{fWiki}$ the full name is preferred.

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): celestial sphere $(3)$
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): horizon
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): celestial sphere $(3)$
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): horizon