Can you guess the subject of this photograph?
Here’s a hint: it’s big, gassy, and rhymes with pattern. It’s Saturn! Kind of. Technically, it’s of Saturn’s D-ring, the innermost (and faintest) ring encircling our solar system’s second-largest planet. Via the Cassini mission’s image page: Saturn’s D ring may be faint and difficult to observe, but it rewards our patience. In this image, the…