Tubular Cloud Craft

Former NASA astronaut Franklin Story Musgrave claimed to had seen an 8 foot-long snake, white in color, floating through space. 

“On two of my missions, (Dec 1993) I have seen, a snake out there, six seven eight feet long. It is rubbery because it has internal waves in it and it follows you for a rather long period of time. The more you fly in space the more you see an incredible amount of things out there and THAT sorta brings to you, really a certainty, that other living creatures are out there. Some incredibly primitive, more primitive, some just ah just proteins coming together, amino acids and some just single-cell organisms and other civilizations that have been around for a million years that are doing unimaginable kinds of things.”

There is even a video (see below - youtube link) where a snake-like creature is floating in the Earth’s stratosphere. Musgrave said: “Some are incredibly primitive – some just proteins coming together, amino acids, and some just single-celled organisms. And other civilizations have been around for millions of years that are doing unimaginable kinds of things.”

Now ... don't mistake black full-ring clouds for the M-craft that Dante showed us.

However, you'll likely encounter more examples of the following black closed rings floating in the sky, with people freaking out about them. However, in this case, it's quite likely there is a plausible and mundane explanation. In most cases. 

I want you to be able to discern!

Possible explanation to pass off the above phenomena ... diesel smoke ejections from a chimney stack.