 | The IMAGE satellite has detected signs of a neutral-particle solar wind that accompanies
the more familiar charged plasma detected by satellites such as ACE. Because interstellar neutral hydrogen flows into the heliosphere from a direction that
places the Earth upstream in the interstellar neutral flow in early June of every year, it
was expected that the neutral solar wind flow discovered by IMAGE would exhibit and annual
variation, peaking in the upstream direction. Although this prediction was confirmed by
IMAGE observations, the location of the peak is shifted from its expected location and the
neutral solar wind flux is significantly higher than expected."
(2001: M.R. Collier, T.E. Moore, K.W. Ogilvie, D. Chornay, J. Keller, S.A. Fuselier,
J.M. Quinn, P. Wurz, M. Wuest, K.C. Hsieh)
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