Kirsten Jorgensen almost didn't get this shot. She was getting ready to leave after taking pictures of the solar eclipse in Lewiston, Idaho, and then a plane approached. It was probably American Airlines flight 9661, as later research indicated. She tells about the moment it happened:
I was about to pack my stuff up and go back inside, but I had my camera set up and in the direction of the sun when I was taking pictures. All of the pictures were ending up looking like the moon pretty much so I gave up. Then I saw the plane fly over and ran over to take a photo. It caught me off guard!
The result is beautiful, and you might see it in many places over the next few days. Or years. -via reddit