The nadir (from Arabic: نظير / ALA-LC: naẓīr, meaning "opposite") is the direction pointing directly below a particular location; that is, it is one of two vertical directions at a specified location, orthogonal to a horizontal flat surface there. Since the concept of being below is itself somewhat vague, scientists define the nadir in more rigorous terms. Specifically, in astronomy, geophysics and related sciences (e.g., meteorology), the nadir at a given point is the local vertical direction pointing in the direction of the force of gravity at that location. The direction opposite of the nadir is the zenith.
Nadir also refers to the downward-facing viewing geometry of an orbiting satellite, such as is employed during remote sensing of the atmosphere, as well as when an astronaut faces the Earth while performing a spacewalk.
The word is also used figuratively to mean the lowest point of a person's spirits, or the quality of an activity or profession.
The term nadir can also be used to represent the lowest point reached by a celestial body during its apparent orbit around a given point of observation. This can be used to describe the location of the Sun, but it is only technically accurate for one latitude at a time and only possible at the low latitudes. The sun is said to be at the nadir at a location when it is at the zenith at the location's antipode.
Nadir.org is a German web portal, based in Hamburg. It sees itself as "an information system to leftist politics and social movements in the internet". It is one of the oldest German organisations of left groups and for initiatives-based websites. Since 2006, new entries were largely adjusted and a manifesto against retention was published in October 2008. Gradually, it was replaced by the open information platform indymedia. Topics included were anti-fascism, anti-racism and work against sexism.
In particular, the magazines Radikale Zeiten, the "Rote Hilfe Zeitung", Gegendruck, Zeck and Interim were collected electronically.
The term "nadir" means "a point to which a central perspective in an infinitely long distance converges", in the Arabic language "a vanishing point at infinity".
The Hamburg-based news portal was used, according to the Annual Report of the State Office for the Protection of North Rhine-Westphalia 2004, by left-wing extremists and is referred to as "the oldest left-wing extremist portal".
Nadir is both a surname and a given name. Notable people with the name include:
Decipher is the second album by Dutch symphonic metal band After Forever, released in 2001. In this album, the band make use of live classical instruments and a complete choir to back up the soprano voice of lead singer Floor Jansen. Thrown in the mix are also a duet of soprano and tenor voices in "Imperfect Tenses" and the recording of the late Israeli PM Yizhak Rabin voice during the Peace treaty signing ceremony on October 26, 1994 on "Forlorn Hope". This is the last After Forever album with guitarist and founder Mark Jansen, who left the band soon after its release.
The album has been re-released by Transmission Records in 2003 in a limited edition of 5,000 copies worldwide. The limited edition in digipack had an extended booklet, a sticker with new artwork and two bonus live tracks.
The album was re-released in 2012 as a 2-disc set by the re-financed Transmission Records.
MV Zenith is a cruise ship owned by the Spain-based shipping company Pullmantur Cruises. She was built in 1992 by Meyer Werft, Papenburg, Germany for Celebrity Cruises.
The Zenith was built as a sister ship to Celebrity Cruises' first newbuild MV Horizon. Her interiors were designed by Michael Katsourakis and British designer John McNeece. The Zenith was delivered in February 1992 and set under Liberian flag. She was used for cruises from Florida to the Caribbean and Bermuda islands. In 2002 she was reflagged in the Bahamas. In 2007 she was transferred to Pullmantur Cruises and used for cruises around the Mediterranean.
A 7-Night Cruise from 11 to 18 March 1995 aboard the Zenith is the subject of David Foster Wallace's 1995 essay "A Supposedly Fun Thing I'll Never Do Again" (collected in a collection of the same name and originally published in Harper's as "Shipping Out"). Wallace refers to the Zenith as the Nadir throughout (although he insists "the rechristening's nothing particular against the ship itself").
Zénith is a professional football club based in Cap-Haïtien, Haiti.
Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.