It's a plane.

Haven't seen a plane fly over here for weeks.
This is a vertical panorama of 5 horizontal shots on top of each other.

[Carole G]

Looks great on black

[Issi Bannerman]

Yes, we don't see many of those these days! Beautiful capture.

[mittens (Marilyn)]

Gorgeous looking sky.

[Phil]

Cannot imagine how you do a panorama of 5 shots on top of each other! Nothing 'round here worth trying it for but this is sublime :)