antisolar point


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antisolar point

[¦an·tē¦sō·lər ‚pȯint]
(astronomy)
The point on the celestial sphere which lies directly opposite the sun from the observer, that is, on the line from the sun through the observer.

antisolar point

A point on the celestial sphere 180° from the sun. It is a projection to infinity of a line from the sun through the observer.
References in periodicals archive ?
Depending on whether it is day or night, either the antisolar point or the Sun respectively will be beneath the horizon; at sunset or sunrise, both will be on the horizon.
To align the astrolabe to show what the sky would look like at any given hour of the day, the rete should be turned until the solar or antisolar point is in the correct place among the lines of the unequal hours.