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Jupiter's magnetic field and magnetosphereAmong the planets of the solar system, Jupiter is unique in connection with its size and its large magnetic moment, second only to the sun's. The Jovian magnetic field was first detected indirectly by radio astronomers who postulated its existence to explain observations of nonthermal radio emissions from Jupiter at decimetric and decametric wavelengths. Since the early radio astronomical studies of the Jovian magnetosphere, four spacecraft have flown by the planet at close distances and have provided in situ information about the geometry of the magnetic field and its strength. The Jovian magnetosphere is described in terms of three principal regions. The inner magnetosphere is the region where the magnetic field created by sources internal to the planet dominates. The region in which the equatorial currents flow is denoted as the middle magnetosphere. In the outer magnetosphere, the field has a large southward component and exhibits large temporal and/or spatial variations in magnitude and direction in response to changes in solar wind pressure.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Acuna, M. H.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Behannon, K. W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Connerney, J. E. P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Lunar And Planetary Exploration
Accession Number
Distribution Limits

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