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the earth's axis

См. также в других словарях:

  • Earth-fixed axis system — this system is a right hand orthogonal axis system fixed on the earth. The trajectory of the vehicle is described with respect to this earth fixed axis system. The x and y axes are in a horizontal plane and the z axis is directed downward …   Mechanics glossary

  • Poles of the earth — Pole Pole, n. [L. polus, Gr. ? a pivot or hinge on which anything turns, an axis, a pole; akin to ? to move: cf. F. p[^o]le.] 1. Either extremity of an axis of a sphere; especially, one of the extremities of the earth s axis; as, the north pole.… …   The Collaborative International Dictionary of English

  • Figure of the Earth — An oblate spheroid Geodesy …   Wikipedia

  • Earth's rotation — is the rotation of the solid Earth around its own axis. The Earth rotates towards the east, which can be observed by orientation with a magnetic compass at sunrise. As viewed from the star Polaris, the Earth turns counter clockwise. Rotation… …   Wikipedia

  • History of the Earth — For the history of modern humans, see History of the world. Geological time put in a diagram called a geological clock, showing the relative lengths of the eons of the Earth s history The history of the Earth describes the most important events… …   Wikipedia

  • Diurnal motion of the earth — Diurnal Di*ur nal, a. [L. diurnalis, fr. dies day. See {Deity}, and cf. {Journal}.] 1. Relating to the daytime; belonging to the period of daylight, distinguished from the night; opposed to {nocturnal}; as, diurnal heat; diurnal hours. [1913… …   The Collaborative International Dictionary of English

  • Earth's gravity — Earth s gravity, denoted by g , refers to the gravitational attraction that the Earth exerts on objects on or near its surface. Its strength is usually quoted in terms of the acceleration it gives to falling bodies (acceleration due to gravity),… …   Wikipedia

  • Dipole model of the Earth's magnetic field — Plot showing field lines (which, in three dimensions would describe shells ) for L values 1.5, 2, 3, 4 and 5 using a dipole model of the Earth s magnetic field The dipole model of the Earth s magnetic field is a first order approximation of the… …   Wikipedia

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

  • Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

  • Earth's orbit — In astronomy, The Earth s Orbit involves the Earth orbiting the Sun at an average distance of about 150 million kilometers every 365.2564 mean solar days (1 sidereal year). From Earth, this gives an apparent movement of the Sun with respect to… …   Wikipedia

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