The latest images show much greater detail of the rings than were first acquired by the probe when it arrived in 2004, even though it actually flew closer to the rings back then, but did not get as high quality images, and that was only one pass compared to the 20 it's making now. These new images show some new things in the rings, items scientists call "straw," a feature that is caused by clumping ring particles, and "propellers," which are disturbed ring material around small, embedded moonlets.