Advertisement
Advertisement
celestial horizon
noun
, Astronomy.
- horizon2b
celestial horizon
celestial horizon
- A great circle on the celestial sphere having a plane that passes through the center of the Earth at a right angle to the line formed by an observer's zenith and nadir. The celestial horizon divides the celestial sphere into two equal hemispheres based on the observer's location, with one hemisphere representing the half of the sky visible to the observer at that location and the other representing the half that is hidden from the observer below the Earth's horizon. The celestial horizon is used as the reference point in determining a celestial body's altitude .
- Also called rational horizon
- Compare sensible horizon
Discover More
Word History and Origins
Origin of celestial horizon1
First recorded in 1895–1900
Discover More
Example Sentences
The plane of the celestial horizon is, of course, different for different positions of the observer on the earth.
From Project Gutenberg
On the celestial horizon are the north, east, south and west points.
From Project Gutenberg
Advertisement
Advertisement
Advertisement
Advertisement
Browse