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earth-period orbit

См. также в других словарях:

  • 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

  • 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 impact hazard — ▪ astronomy Introduction  the danger of collision posed by astronomical small bodies whose orbits (orbit) around the Sun carry them near Earth. These objects include the rocky asteroids and their larger fragments and the icy nuclei of comets.… …   Universalium

  • Earth observation satellite — An Earth observation satellite, ERS 2 Earth observation satellites are satellites specifically designed to observe Earth from orbit, similar to reconnaissance satellites but intended for non military uses such as environmental monitoring,… …   Wikipedia

  • Earth Changes — The term Earth Changes describes a belief prevalent in certain segments of the New Age movement. Believers in the Earth Changes theory believe that the world will soon enter on a series of catastrophic changes that will begin a major alteration… …   Wikipedia

  • Earth-crossing asteroid — Asteroid whose path around the Sun crosses Earth s orbit. Three groups of such asteroids Aten, Apollo, and Amor asteroids are distinguished by the size of their orbits and how closely they approach the Sun. The Atens and Apollos cross Earth s… …   Universalium

  • Earth in science fiction — Earth An overwhelming majority of fiction is set on or features the Earth. However, authors of speculative fiction novels and writers and directors of science fiction film deal with Earth quite differently from authors of conventional fiction.… …   Wikipedia

  • Orbit insertion — is the spaceflight operation of adjusting a spacecraft’s momentum to allow for entry into a stable orbit around a planet, moon, or other celestial body.[1] This maneuver involves either deceleration from a speed in excess of the respective body’s …   Wikipedia

  • Earth Alliance (The History of the Galaxy) — Earth Alliance is a fictional political entity in The History of the Galaxy series of novels by Russian writer Andrey Livadny. It was formed through the joining of the Earth nation states sometime between the 21st and the early 23rd centuries.… …   Wikipedia

  • Orbit — This article is about orbits in celestial mechanics, due to gravity. For other uses, see Orbit (disambiguation). A satellite orbiting the Earth has a tangential velocity and an inward acceleration …   Wikipedia

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