"The mesosphere is a layer of the atmosphere about 30 to 50 miles above Earth's surface. That makes it a tricky place for scientists to study...It's too high for airplanes, and it's too low for satellites, so it's difficult to probe what is going on at that altitude region," he says.
"Sky watchers only discovered the eerie green glow of mesospheric ghosts in 2019. As their full name suggests, these displays lurk above sprites, which are vibrant red lights...caused by differences in electric charge within thunderstorms."
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