A few days after Earth's light show, another series of eruptions screamed out of the sun. This time, on May 20, Mars was blitzed by a beast of a storm. Observed from Mars, this was the strongest solar energetic particle event we've seen to date, said Shannon Curry, the principal investigator of NASA's MAVEN.
When the barrage arrived, it set off an aurora that enveloped Mars from pole to pole in a shimmering glow. If they were standing on the Martian surface, astronauts could see these auroras, Dr. Curry said.
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