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Message: <blockquote data-quote="davek" data-source="post: 1356988" data-attributes="member: 519">It's a nice clear evening here and I was looking at the contrails on the horizon of an Eastbound aircraft heading my way. The sun is setting in the Southwest, orange light in the sky. The contrails to the West are still white, as to be expected since the sunlight they are getting is not tinged orange by the dust in the atmosphere since the sun is still at a higher angle with respect to the Western part of the contrail.With all due respect to the experts that have declared this to be a contrail.... I call bull*!WWRFS - What would Richard Feynman say?</blockquote>