While most lightning is white, and strikes downwards, from the clouds to the ground, red sprites are flashes of coloured ...
NASA's Don Pettit impersonated fellow astronaut Matthew Dominick to show what it's like when two astronauts get to nerd out ...
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Sprites are akin to gigantic red lightning bursts. Steve Cummer, a Duke University engineer who's studied sprites for years, summed up how they form quite nicely in a National Geographic News ...