Crescents of Triton and Neptune
When Voyager 2 took this image, it "was plunging southward at an angle of 48 degrees to the plane of the ecliptic," according to NASA. Besides its 11 satellites, Neptune also boasts a planetary ring system. The three main rings are named for Neptune's first researchers, the Adams ring, the La Verrier ring and the Galle ring. But recent evidence shows that the rings are unstable and may be deteriorating in spots.