Contrails

Sometimes all the planes together create a nice drawing in the sky.

[cheryl green]

It's always fascinating to me to see this happen...nice photo...!

[Saxa van Eijnsbergen]

Je kunt nu boter kaas en eieren in de lucht spelen.

[John E]

Nice capture! Condensation trails dissipate within a few moments and do not linger in the sky for long periods of time. What you're referring to is chemtrails.