Origin of celestial horizon
Definition for celestial horizon (2 of 2)
- the small circle of the celestial sphere whose plane is tangent to the earth at the position of a given observer, or the plane of such a circle (sensible horizon).
- Also called rational horizon. the great circle of the celestial sphere whose plane passes through the center of the earth and is parallel to the sensible horizon of a given position, or the plane of such a circle (celestial horizon).
Origin of horizon
British Dictionary definitions for celestial horizon (1 of 2)
British Dictionary definitions for celestial horizon (2 of 2)
- Also called: sensible horizon the circular intersection with the celestial sphere of the plane tangential to the earth at the position of the observer
- Also called: celestial horizon the great circle on the celestial sphere, the plane of which passes through the centre of the earth and is parallel to the sensible horizon
Word Origin for horizon
Word Origin and History for celestial horizon
late 14c., orisoun, from Old French orizon (14c., Modern French horizon), earlier orizonte (13c.), from Latin horizontem (nominative horizon), from Greek horizon kyklos "bounding circle," from horizein "bound, limit, divide, separate," from horos "boundary." The h- was restored 17c. in imitation of Latin.
Science definitions for celestial horizon (1 of 2)
Science definitions for celestial horizon (2 of 2)
- The apparent intersection of the Earth and sky as seen by an observer. Also called apparent horizon
- See celestial horizon.
- See sensible horizon.
- A specific position in a stratigraphic column, such as the location of one or more fossils, that serves to identify the stratum with a particular period.
- A specific layer of soil or subsoil in a vertical cross-section of land.
Idioms and Phrases with celestial horizon
see on the horizon.