aurora
Refers to the natural light display in the sky, especially in high-latitude regions. The native Japanese term is 極光 (きょっこう), but オーロラ is more common in everyday use.
See also: 極光 (きょっこう)
I traveled to Northern Europe to see the aurora.
An aurora might appear tonight.
The aurora is clearly visible from this spot.
I saw the aurora in Iceland.