This panel of images shows the nearly spherical shape of Saturn’s moon Phoebe, as derived from imaging obtained from NASA’s Cassini spacecraft. Each image represents a 90-degree turn.

Phoebe's physical properties, as well as its odd orbital characteristics, led the authors to conclude that the moon formed in the Kuiper Belt region, making it a cousin to Pluto.

Saturn’s moon Phoebe was the first thing Cassini visited on its way to the Lord of the Rings. Click to encronosenate. Photo by NASA/JPL-Caltech/SSI ...

Mosaic of two images of Saturn’s moon Phoebe, taken during the June 11 flyby of the Cassini spacecraft. Space Science Institute, NASA/JPL.

Saturn’s moon Phoebe seems to be the system’s oddball; it likely didn’t form in place, but was captured after forming much farther out in the solar system. NASA/JPL. One oddball.

When it comes to Saturn’s moons, Phoebe tends to be overshadowed by its siblings. Titan‘s size earns her the title of Saturn’s biggest moon (and the second-biggest moon in our solar system ...