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It was the breathtaking solar event that sparked spectacular displays of Northern Lights across much of the northern hemisphere. In August the sun's surface suddenly erupted and blasted tons of plasma - ionised atoms - into interplanetary space. It took two days for the atoms to travel the 93million miles to Earth.
NASA captured images of the event, called a coronal mass ejection, from the Solar Dynamics Observatory (SDO). Now scientists believe the startling images may have fundamentally changed how we think about the sun’s surface.
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