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This 'Ask an Astronomer' segment attempts to explain what a solar wind is (and is not).

The solar wind is a stream of charged particles (i.e., a plasma) which are ejected from the upper atmosphere of the sun. It consists mostly of high-energy electrons and protons (about 1 keV) that are able to escape the sun's gravity in part because of the high temperature of the corona and the high kinetic energy particles gain through a process that is not well understood at this time. (wikipedia)
Posted in Space | Permalink | Wikipedia