Research with the SOHO (Heliospheric and Solar Observatory) has revealed the process by which the Sun reverses its magnetic field every 11 years. This happens due to the cumulative effect of more than a thousand huge eruptions called coronal mass ejections. The investigations of these phenomena have not only been carried out thanks to SOHO, but also the data taken between 1975-1985 by a satellite (P-78-1) of the US Air Force, as well as other telescopes in land (Kitt Peak, USA and Nobeyama, Japan).
Coronal mass ejections emit billions of tons of electrified gas into space, expelling the old solar magnetic field and allowing a new one to be formed with an inverse orientation. The solar magnetic field is reversed every 11 years. During this period the activity of the Sun goes from being calm to very active and then decreases again. These coronal mass ejections affect our daily lives: they cause problems in satellite electronics, radio communications and energy systems.
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