Blue Jet
A sporadic optical high-altitude conical emission which occurs between the tops of some thunder clouds and the ionosphere. They were first reported by Wescott et al. (1995), although they had previously been reported by airline pilots.
[5] SPRITES, BLUE JETS, & ELVES: THE DEMONS ABOVE THE CLOUDS
* Late in the 20th century, atmospheric scientists discovered an interesting mystery of science.
A strong radio source. Optically, it is an elliptical galaxy (M87) with a luminous blue jet about 1500 pc long. It is also an X-ray source (3C 274, Virgo X-1, 2U 1228+12). [H76]
Virgo Cluster ...
The bright blue jet shooting from the region of the black hole is created by gas that never made it into the hole itself but was instead funneled into a very energetic jet. Image: Gemini Observatory/AURA illustration by Lynette Cook.
 See also: Light, Jet, Emission, Earth, Gravity
  
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