Unveiling the Enigmatic Origins of Atmospheric Green Ghosts

The origin of mysterious green "ghosts" in the sky, a type of transient luminous phenomenon, has been discovered by a team of Spanish scientists. These green lights, which occasionally appear above red sprites, are caused by the presence of metals, particularly iron and nickel, from interstellar dust entering the atmosphere. The scientists used a spectrograph to analyze the light and found that while there is some oxygen involved, the majority of the emissions are from iron. The discovery could explain why these green ghosts are so rare.