Green energy
A spectacular display of the aurora borealis over Silkeborg, Denmark.  The flashes of light are caused by superheated gas in the atmosphere  arriving from the sun after a coronal mass ejection, otherwise known as a  solar storm

Green energy

A spectacular display of the aurora borealis over Silkeborg, Denmark. The flashes of light are caused by superheated gas in the atmosphere arriving from the sun after a coronal mass ejection, otherwise known as a solar storm

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