| an emanation from the sun's corona consisting of a flow of charged particles, mainly electrons and protons, that interacts with the magnetic field of the earth and other planetary bodies. |
solar wind  (wĭnd)  n. A stream of high-speed, ionized particles ejected primarily from the sun's corona. |
A stream of particles (mostly protons) emitted by the sun and permeating the solar system.
Note: Particularly strong bursts of particles can penetrate the upper atmosphere and disrupt radio communications on Earth.