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Elves

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science2 years ago

Rare ELVES Phenomenon Captured as Red Atmospheric Circle.

A rare atmospheric event known as an ELVE, or Emission of Light and Very Low-Frequency perturbations due to Electromagnetic Pulse Sources, was captured on camera in the Italian sky. ELVES are an excitation of nitrogen in the atmosphere caused by electrical discharges, taking the color red like in the lower edges of northern lights. They are flat and can extend for hundreds of kilometers in the ionosphere. These peculiar events were only discovered in 1990 by the crew of Space Shuttle Discovery on the mission that sent the Ulysses probe to study the Sun.