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Apparent horizon

apparent horizon
apparent horizon
See horizon.
Historical Examples

No land points visible from the summit, except those bounding the apparent horizon, reach equal or greater altitude.
Appletons’ Popular Science Monthly, May, 1900 Various

The tops of the clouds must not be more than five or ten degrees above the apparent horizon.
Notes and Queries, Number 206, October 8, 1853 Various

The introduction of a descending plane lowers the apparent horizon; that of an ascending plane elevates it.
Harvard Psychological Studies, Volume 1 Various


Read Also:

  • Apparent magnitude

    the magnitude of a star as it appears to an observer on the earth. Historical Examples Thus he looks down, as it were, upon the heaviest seas, and this greatly diminishes their apparent magnitude and elevation. Rollo on the Atlantic Jacob Abbott The comet of 1652, so carefully observed by Hevelius, almost equaled the moon […]

  • Apparent movement

    noun (psychol) the sensation of seeing movement when nothing actually moves in the environment, as when two neighbouring lights are switched on and off in rapid succession Historical Examples The observer sits with his eye to the telescope, watching the apparent movement of the star. Marvels of Scientific Invention Thomas W. Corbin However, is it […]

  • Apparent solar day

    the period of time between two successive passages of the sun’s center across the same meridian.

  • Apparent temperature

    . apparent temperature See heat index.

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