The solar wind varies routinely through the 27-day rotation of the Sun, as well as sporadically, in response to violent eruptions in the corona. These eruptions can result in geomagnetic storms on Earth. Read more about space weather... The composition of the solar wind reflects the composition of the solar corona, modified by solar wind processes. The exact mechanism of solar wind formation is not known. Accurately measuring its composition aids in separating the effects of these processes from the original makeup of the corona.
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