Ionizing radiation

A hole in the sun's corona, as photographed yesterday (27/11/2011) by the SDO spacecraft. NASA monitors space 'weather' events

"Prediction of solar storms and their impact on Earth is improving: a two-day warning instead of an hour, but there is still room for improvement in the models"

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This is what Dr. Ofer Cohen of the Harvard-Smithsonian Observatory says, during the "Solar Cycle No. 24 and its Impact on Ground and Space Infrastructures" seminar that took place yesterday at the Open University