Sky magazine is published by delta airlines as a service to their customers. I have found no connection between sky online and sky magazine.
Sky Entertainment offers a print magazine and an online magazine. The magazine was originally started by the British in the 1980's.
Sky Magazine was a magazine that was in production in England up until 2001. The magazine had stories related to entertainment. The magazine focused on stories regarding actors, movies, and music.
Gas comes out of airplanes, which causes air pollution, and sometimes changes the sky color.
The sky
A formation
Condensation trails or 'con trails'.
The engines create smoke .
No There Is Not
Some people have drawn things in the sky with airplanes, some gas or smoke but its only temporary.
-- stars -- meteors -- airplanes.
You can buy Sky and Telescope magazine from your local newsagents. They will be able to order it in for you if they don't normally stock it on their shelves and even deliver it to you.
exhaust