SUMMARY: NASA/ESA's SOHO spacecraft spotted the third largest coronal mass ejection (CME) ever seen, which exploded from a sunspot early Tuesday. The CME was an X17.2 category flare, and hurled material directly towards the Earth; it's expected to reach us in about a day; the aurorae should be spectacular and visible even from middle latitudes. High energy particles from the Sun could disrupt satellite communications, and astronauts on the space station will take extra precautions to stay safe.
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