English Dictionary

bluejet

noun

(astronomy, meteorology) an upper atmospheric optical phenomenon associated with thunderstorms, rapidly expanding disk-shaped regions of luminosity, lasting less than a thousandth of a second, which occur high above energetic cloud-to-ground lightning of positive or negative polarity

The blue jet is a phenomenon observed in astronomy.

意味（1）

(astronomy, meteorology) an upper atmospheric optical phenomenon associated with thunderstorms, rapidly expanding disk-shaped regions of luminosity, lasting less than a thousandth of a second, which occur high above energetic cloud-to-ground lightning of positive or negative polarity

Mysterious bluejets can be seen with the naked eye from the ground, but they are rare and difficult to spot.