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nodal period

См. также в других словарях:

  • Nodal precession — is the precession of an orbital plane around the rotation axis of an astronomical body such as the Earth. This precession is due to the non spherical nature of a spinning body which creates a non spherical gravitational field. Around a spherical… …   Wikipedia

  • Lunar node — Dragon s Tail redirects here. For the Dragon s Tail stretch of road in North Carolina, see Deals Gap, North Carolina. The lunar nodes are the points where the moon s path in the sky crosses the ecliptic, the sun s path in the sky The lunar nodes… …   Wikipedia

  • Lunar precession — Unreferenced|date=May 2007There are two important precessional motions in the Orbit of the Moon.The long axis (line of the apsides: perigee and apogee) of the moon s elliptical orbit precesses about once in just under 9 years. It is caused by the …   Wikipedia

  • Year — A year (from Old English gēar) is the orbital period of the Earth moving around the Sun. For an observer on Earth, this corresponds to the period it takes the Sun to complete one course throughout the zodiac along the ecliptic. In astronomy, the… …   Wikipedia

  • Omid — For other uses, see Omid (disambiguation). Omid satellite Omid satellite model Operator ISA …   Wikipedia

  • Registration Convention — The Convention on Registration of Launched Objects into Outer Space was adopted by the United Nations General Assembly in 1974UN document |docid=A RES 3235(XXIX) |type=Resolution |body=General Assembly |session=29 |resolution number=3235… …   Wikipedia

  • chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

  • eye, human — ▪ anatomy Introduction  specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit       The eye is protected from mechanical injury… …   Universalium

  • earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …   Universalium

  • Vibraphone — Infobox instrument name=Vibraphone names=Vibraharp, Vibes image capt=A typical vibraphone color=#FFEC8B classification=Percussion instrument (Idiophone) range= related= musicians= builders= articles=The vibraphone, sometimes called the vibraharp… …   Wikipedia

  • Electricity market — An electricity market is a system for effecting the purchase and sale of electricity using supply and demand to set the price. Wholesale transactions in electricity are typically cleared and settled by the grid operator or a special purpose… …   Wikipedia

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