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7 April 2020
Researchers have just published a theory of what powers the celestial phenomenon known as STEVE, the aurora-like glow amateur sky-watchers brought to scientists’ attention in 2016. Scientists first thought STEVE was a new kind of aurora, but previous research shows its light is not produced the same way. Researchers are still unsure of what generates STEVE’s light, but a group of space physicists now suspect STEVE lights up when fast-flowing rivers of plasma jumpstart certain chemical reactions high in the atmosphere.