Publication Date:
2000-08-26
Description:
On 3 January 2000, the Galileo spacecraft passed close to Europa when it was located far south of Jupiter's magnetic equator in a region where the radial component of the magnetospheric magnetic field points inward toward Jupiter. This pass with a previously unexamined orientation of the external forcing field distinguished between an induced and a permanent magnetic dipole moment model of Europa's internal field. The Galileo magnetometer measured changes in the magnetic field predicted if a current-carrying outer shell, such as a planet-scale liquid ocean, is present beneath the icy surface. The evidence that Europa's field varies temporally strengthens the argument that a liquid ocean exists beneath the present-day surface.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kivelson, M G -- Khurana, K K -- Russell, C T -- Volwerk, M -- Walker, R J -- Zimmer, C -- New York, N.Y. -- Science. 2000 Aug 25;289(5483):1340-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, USA. mkivelson@igpp.ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10958778" target="_blank"〉PubMed〈/a〉
Keywords:
Extraterrestrial Environment
;
Ice
;
*Jupiter
;
Magnetics
;
*Water
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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