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equinoctial system of coordinates

См. также в других словарях:

  • equatorial system — A set of celestial coordinates based on the celestial equator as the primary great circle. It is usually expressed as declination and an hour angle or a sidereal hour angle. Also called an equinoctial system of coordinates or a celestial equator… …   Aviation dictionary

  • celestial coordinates — Two coordinates on the surface of the celestial sphere used to determine the position of a celestial body. Two sets of celestial coordinates are in common use: the equinoctial system, in which the coordinates are a declination and an hour circle …   Aviation dictionary

  • Equinox — This article is about the astronomical event when the sun is at zenith over the Equator. For other uses, see Equinox (disambiguation). For the same event happening on other planets and setting up a celestial coordinate system, see Equinox… …   Wikipedia

  • Hipparchus — (Greek polytonic|Ἵππαρχος; ca. 190 BC ndash; ca. 120 BC) was a Greek astronomer, geographer, and mathematician of the Hellenistic period.Hipparchus was born in Nicaea (now Iznik, Turkey), and probably died on the island of Rhodes. He is known to… …   Wikipedia

  • geomagnetic field — Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth s surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the… …   Universalium

  • Uranus — This article is about the planet. For other uses, see Uranus (disambiguation). Uranus   …   Wikipedia

  • physical science — physical scientist. 1. any of the natural sciences dealing with inanimate matter or with energy, as physics, chemistry, and astronomy. 2. these sciences collectively. [1835 45] * * * Introduction       the systematic study of the inorganic world …   Universalium

  • Dennis Rawlins — Born 1937 (age 73–74) Baltimore, Maryland, United States Nationality American Occupation Astronomer, Historian, Publisher Dennis Rawlins (born 1937 in Baltimore, Maryland) is an American astronomer, historian, and publisher …   Wikipedia

  • Estonia — Infobox Country native name = et. Eesti Vabariik conventional long name = Republic of Estonia common name = Estonia national anthem = Mu isamaa, mu õnn ja rõõm (English: en. My Fatherland, My Happiness and Joy ) map caption = map caption|location …   Wikipedia

  • Anjouan — Autonomous Island of Anjouan[1] Île Autonome d Anjouan[2][3] Ndzuwani …   Wikipedia

  • New Hebrides — Condominium Condominium des Nouvelles Hébrides 1906–1980 …   Wikipedia

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