Jupiter


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Jupiter's magnetosphere is very large, extending over a million km in all directions and as far as the orbit of Saturn in the direction away from the Sun.



Magnetosphere
The magnetosphere of a planet is the region of space in which a planet's magnetic field dominates that of the solar wind. The stronger the magnetic field, the larger the magnetosphere. The magnetic field of Jupiter is 20,000 times stronger than Earth's. Thus, Jupiter's magnetic field creates a magnetosphere so large it begins to avert the solar wind almost 3 million kilometers before it reaches Jupiter. The magnetosphere extends so far past Jupiter it sweeps the solar wind as far as the orbit of Saturn.

Resources

 * Physics of the Outer Heliosphere: Proceedings of the 1st COSPAR Colloquium Held in Warsaw, Poland, 19-22 September 1989, S. Grzedzielski, D.E. Page, Elsevier, Oct 22, 2013
 * https://www.dartmouth.edu/~hrm/R/heliosphere.html