Spaceship or what?

We have been working long hours on the farm over the past week, harvesting one cutting of hay.

After last years drought, we are very thankful for the grass growing and the opportunity to bale hay to feed the cows this winter.

I was stopped on my rake tractor, waiting on the hay baler to catch up with me, when I took this picture. This pic was taken with my iPod, no fancy smancy settings, nothing. Simply point and shoot then framed with an app.

So my question to you is... Can you explain the spaceship-like ring in the picture? What's your guess?

I'll share what's really going on in the picture later this week.