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.
The sky
In the sky, you can see clouds, the sun, the moon, stars, and sometimes airplanes.
A formation
No There Is Not
The engines create smoke .
Condensation trails or 'con trails'.
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.
Some people have drawn things in the sky with airplanes, some gas or smoke but its only temporary.
The sky appears blue due to Rayleigh scattering, where shorter blue wavelengths of light are scattered more than other colors by molecules in the Earth's atmosphere. This scattering effect is present regardless of whether airplanes are flying or not. Airplane contrails can contribute to haze under certain atmospheric conditions, but they are not the primary reason for the sky's blue color.
-- stars -- meteors -- airplanes.