Since then, none of these inner satellites has been further observed, and no detailed observations of the rings have been possible. With this increase in accuracy, astronomers can better probe the unusual dynamics of this complicated system. Though initial data on the positions and motions of the satellite were obtained by Voyager 2, the moons have orbited about the planet nearly 10,000 times since the 1986 fly-by. This may permit a more detailed understanding of the origin or source of the satellites, and how Uranus' satellite system has evolved since the planet's formation 4.5 billion years ago. Details about the rings, including structure and brightness, were not determined until the Voyager 2 fly-by in 1986.
Structure related to the inner rings is also visible.
Accurate photometry on the epsilon ring may indicate the source, or origin, of the particles that compose the rings. At present, there are seasonal illumination changes since the orbital motion has moved the pole about 35o away from the Sun.