Saturn's Phoebe Ring is much farther from the planet than Saturn's other rings. Though large in volume, the Phoebe ring is very tenuous and is therefore too dim to be seen with normal light. It was detected at infrared wavelengths by the Spitzer space telescope. This image is an artist's depiction. Note that Saturn and its other, closer rings, shown in an inset, are just a small dot at the size scale of the Phoebe ring.
Image courtesy NASA/JPL-Caltech/Keck.