Tonight, NASA will attempt again to launch a small rocket from the coast of Virginia — one aimed at creating multicolored clouds high in the sky. Just a few minutes after launch, the rocket will release canisters filled with various chemicals, forming green and red artificial clouds that may be seen along the US East Coast. It’s all part of a plan to study how particles move in the upper atmosphere, which could help us better study the aurorae and the parts of our atmosphere that are electrically charged by solar and cosmic radiation.
Don’t worry, the chemicals the rocket is releasing are in no way toxic to your health. They’re vapor tracers — gases that create visible clouds high in the sky. They’re made of barium, lithium, and...
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