Noctilucent clouds are so high in the atmosphere that they are still illuminated by the sun even after it has set below the horizon for ground observers.elaborate
Crepuscular rays, those dramatic sunbeams that appear to radiate from the sun, are actually caused by shadows cast by clouds or other atmospheric particles.
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Numerical models, while powerful, are only as good as the data and assumptions they're built upon. Garbage in, garbage out, applies very strongly.
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