The ring system is faint and is made mainly of dust. It has four main parts: a thick inner ring known as the "halo" ring, a bright but very thin "main" ring, and two outer, wide, faint "gossamer" rings. These gossamer rings are made from dust from the moons Amalthea and Thebe and have been name after them. They are known as "gossamer" rings because they are transparent, or "see through".