10 photos of the Northern Lights dazzling in the night sky across the US and Europe caused by massive geomagnetic storm

• On Friday night, the Northern Lights put on a spectacular show for US and European star-gazers.
• The lights, Aurora Borealis, were triggered by a huge geomagnetic storm headed toward Earth.
• High-energy particles from the sun interacting with Earth's magnetic field cause geomagnetic storms.

Skies over the US and Europe were transformed into shades of interstellar pink, purple, blue, and green on Friday night as the Northern Lights produced a dazzling display.