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magnetosphere |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.06 sec. |
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magnetosphere: see Van Allen radiation belts Van Allen radiation belts, two belts (sometimes considered as a single belt of varying intensity) of radiation outside the earth's atmosphere, extending from c.400 to c.40,000 mi (c.650–c.65,000 km) above the earth. ..... Click the link for more information. . magnetosphereRegion around a planet (such as Earth) or a natural satellite that possesses a magnetic field (see geomagnetic field) where magnetic phenomena and the high atmospheric conductivity caused by ionization strongly influence the behaviour of charged particles (see electric charge). A planet or moon's magnetic field, like its gravitational field, becomes weaker with distance from the body. The solar wind sweeps a body's magnetosphere out away from the Sun in a “tail” trailing well beyond it. |
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| The unmanned spacecraft--which during its lifespan made the first observation of ammonia clouds in another planet's atmosphere as well as the first finding of a moon with its own magnetosphere and the first discovery of a satellite around an asteroid--compiled evidence of an ocean under the surface of the moon Europa and observed numerous large thunderstorms on Jupiter. His interests range from land/atmosphere interactions right up through solar wind interaction with the earth's magnetosphere. Satellites that had been orbiting just inside the magnetosphere may now lie just outside it, where they are no longer protected from an onslaught of energetic charged particles that can harm their sensitive electronics. |
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magnetosphere
