Scientists finally solve mystery of weird aurora-like lights in the sky. - NBCNewsMACH
by citizen scientists in western Canada. A 2018 study showed that its glow, unlike one leading hypothesis had proposed, does not result from charged particles falling into the atmosphere. The authors also pointed out that STEVE can show up at the same time as an aurora does, which makes it even harder to figure out which is which.
When STEVE was on display, the study authors realized, energetic electrons were pouring into Earth's ionosphere, the layer of the planet's atmosphere where atoms lose electrons due to solar and cosmic radiation. The friction that flood creates heats particles, which creates the pinkish glow, almost like an incandescent light bulb.
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