sunset contrail

  1. Mick West

    Sunset Contrail "UFO" over Denver, Nov 23 2018

    In videos posted on Facebook (now removed, #1, #2) we see a plane leaving a contrail across a good portion of the sky. The contrail is below a cloud layer, but because the sun has set it is illuminating the clouds from below and the contrail is casting a shadow upwards onto the clouds! The...