No that is not a Phoenix, archangel Michael's wings or St. Germain's mustache in the sky

That is artificial, man-made sky pollution from airplanes. There is nothing beautiful, or spiritually enlightening about it. I love my friends dearly but I wish they wouldn't glorify such things. Let's say hypothetically it was a spiritual entity working through aircraft exhaust fumes to depict messages, it seems more likely that it would be of a manipulative nature. If that is the case then maybe it was one of those characters I mentioned. There are plenty of deceivers and false idols out there. This is also why channeling also concerns me.  Discernment is essential but it's not a trait that everyone possesses. Also in this age of AI I wouldn't recommend involving yourself in light code downloads either. It sounds like a ploy to con you into downloading a virus which in turn can be contagious.