单词	plasmasphere
释义	plasmasphere /ˈplazməsfiːə / noun Astronomy The roughly toroidal region surrounding and thought to rotate with the earth (or another planet) at latitudes away from the poles, containing a relatively dense plasma of low-energy electrons and protons.This region is normally shielded by the Earth's plasmasphere, but during the particularly intense solar storms last year, this was eroded somewhat and the ‘safe-zone’ was flooded with ions.... The arm of the plasmasphere pointing toward the Sun, on the lower right, was hypothesized but never before seen directly. The story of the plasmasphere discovery started out as anecdotal.
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