Encyclopedia

nadir

nadir (nā'dur) [key][Arab.,=opposite], in astronomy, the point on the celestial sphere directly opposite the zenith, i.e., directly beneath the observer.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

More on nadir from Fact Monster:

  • Nadir Shah - Nadir Shah Nadir Shah or Nader Shah, 1688–1747, shah of Iran (1736–47), sometimes ...
  • Nader Shah - Nader Shah: Nader Shah: see Nadir Shah.
  • Tahmasp Kuli Khan - Tahmasp Kuli Khan: Tahmasp Kuli Khan: see Nadir Shah.
  • Ahmad Shah - Ahmad Shah Ahmad Shah , c.1723–1773, Afghan ruler (1747–73), founder of the Durani ...
  • celestial horizon - celestial horizon celestial horizon, one axis of the altazimuth coordinate system. It is the great ...

See more Encyclopedia articles on: Astronomy: General