Titlebook: Handbook of Cosmic Hazards and Planetary Defense; Joseph N. Pelton,Firooz Allahdadi Reference work 2015 Springer International Publishing

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Solar and Heliospheric Observatory (SOHO) (1995)tivity in the Sun’s corona and white-light imaging of coronal mass ejections in the extended corona, magnetometry in the Sun’s atmosphere, imaging of far-side activity, measurements to predict solar proton storms, and monitoring solar wind plasma at the L1 Lagrangian point, 1.5 million kilometers upstream of Earth.