What does "transient luminous event" mean?

Any of a variety of upper atmospheric optical phenomena associated with thunderstorms.

What is a synonym for "transient luminous event"?

Common synonyms include: supernovas.

noun

noun ·Rare ·Advanced level

Noun

1
Any of a variety of upper atmospheric optical phenomena associated with thunderstorms.
"Transient luminous events can be another source of ionization in the upper atmosphere."

"Transient luminous events can be another source of ionization in the upper atmosphere."