Photographs
Contrail Convergence Prediction Contrail Convergence Prediction Contrail Convergence Prediction Contrail Convergence Prediction Contrail Convergence Prediction Contrail Convergence Prediction

Contrail Convergence Prediction
1975

In 1975 "Contrail Convergence" predicted the convergence of six contrails over the Denver Art Museum over a period of time. In 2012 a convergence of five contrails occurred at one time in one place and I happened to be there to photograph it.