For other uses, see Aurora.

The Aurora borealis is a bright glow in a planet's atmosphere caused by charged particles colliding with the magnetic field. It can often be seen at night.

During the USS Enterprise's encounter with the galactic barrier in 2265, the barrier was described as being a monstrous version of the Terran borealis. (TOS novelization: Where No Man Has Gone Before)

Green polar lights were visible in the night sky above the Winter Wonderland in 2410. (STO missions: "Fastest Game on Ice", "Tide of Ice")

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