nadir


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nadir

(nā`dər) [Arab.,=opposite], in astronomy, the point on the celestial spherecelestial sphere,
imaginary sphere of infinite radius with the earth at its center. It is used for describing the positions and motions of stars and other objects. For these purposes, any astronomical object can be thought of as being located at the point where the line of sight
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 directly opposite the zenithzenith,
in astronomy, the point in the sky directly overhead; more precisely, it is the point at which the celestial sphere is intersected by an upward extension of a plumb line from the observer's location.
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, i.e., directly beneath the observer.

nadir

(nay -deer) The point on the celestial sphere that lies directly beneath an observer and is therefore unobservable. It is diametrically opposite the observer's zenith and with the zenith lies on the observer's meridian.

Nadir

(religion, spiritualism, and occult)

The nadir is the point in the heavens directly opposite the zenith, which means that it is the point in the heavens on the other side of Earth directly underneath one’s feet. It should be carefully distinguished from the imum coeli, which is the point directly opposite the midheaven.

nadir

[′nā·dər]
(astronomy)
That point on the celestial sphere vertically below the observer, or 180° from the zenith.
(oceanography)
The point on the sea floor that lies directly below the sonar during a survey.

nadir

nadirclick for a larger image
That point on the celestial sphere directly beneath the observer and directly opposite the zenith (i.e., 180° from the zenith, so that the zenith, nadir, and the center of the earth are in one straight line). Also called a nadir point.

nadir

the point on the celestial sphere directly below an observer and diametrically opposite the zenith
References in periodicals archive ?
Nadir has issued commands about Eid Ghadir that Shiites marked as the guardianship of Ali (peace be upon him).
Iraq won't let her in, and Nadir can't go back without his mother.
Mr Justice Holroyde, sitting at the Old Bailey, rejected his claims of poverty and said he believed Nadir had money stashed away.
The first phase of the Nadir Hill excavation took place in 2011, resulting in the exposure of human bones which were dated at 7,000 years old.
Old Bailey judge Mr Justice Holroyde said Nadir stole the money out of "pure greed" and that his behaviour had contributed to PPI crashing.
46 paid by Nadir, 71, in February 1989 to the former Lambourn trainer.
After the sentencing in the packed courtroom, Nadir said "thank you" to the judge.
Nadir, 71, was convicted this week of 10 counts of theft from PPI between 1987 and 1990.
The sentencing of Nadir, who donated Au440,000 to the Tories during the 1980s, came a day after he was convicted of stealing Au28.
The Conservative Party has no record of having received donations from Asil Nadir," the statement said.