broken contrails; invisible cloud

While watching the BBC live broadcast of the first UK astronaut heading for the International Space Station this morning (11 AM GMT), I noted a contrail that started forming behind the Soyuz rocket at about one minute after the lift-off and stopped about ten second later: This suggests...

This picture of Roman numeral "figure eight" contrails had been taken at Saint Simons Island, GA on December 26, 2014. Full image: https://www.metabunk.org/data/MetaMirrorCache/fc0f447ae74bcedffc219d054ebafcad.jpg https://www.flickr.com/photos/51265805@N04/15951417019 The number VIII is made...