Mar. 8th, 2009
Minor weirdness in the sky
Mar. 8th, 2009 09:26 pmJust out for my evening patrol, prior to locking up, and watched a contrail painting itself across the sky. Blinking UFO at the front of it, of course -- as I've noted before, we're under one of the "great circle" routes to Europe, and often have a plane overhead.
But the weirdness . . .
Moon overhead, and the contrail had a ghost above it. Best I can figure, moonlight reflected off the ice crystals of the contrail and lit up atmospheric moisture above, creating a second image. Probably requires certain exact light and viewing angles to work.
But the weirdness . . .
Moon overhead, and the contrail had a ghost above it. Best I can figure, moonlight reflected off the ice crystals of the contrail and lit up atmospheric moisture above, creating a second image. Probably requires certain exact light and viewing angles to work.