Relating to or characteristic of a aurora (the natural light display in Earth's atmosphere); having qualities of the aurora borealis or aurora australis.
From Latin aurora 'dawn' or 'goddess of dawn,' plus -al suffix. Aurora mythology and atmospheric science merged in this term during the 19th century.
The aurora happens because solar wind particles slam into Earth's magnetic field—scientists needed 'auronal' to describe that specific kind of ethereal, glowing atmospheric phenomenon.
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