astroengine writes "On Friday, the sun hurled a coronal mass ejection (CME) at our planet that sparked a strong geomagnetic storm and beautiful aurorae at high latitudes. Late on Sunday (EST), the sun unleashed yet another Earth-bound CME after an M9 flare erupted over a particularly active sunspot region — the CME is expected to hit Earth on Tuesday and Mars on Wednesday. This series of flares and CMEs have ignited the strongest period of solar storms since 2005, according to an NOAA space weather advisory."
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