The Clumps Discovered
Cassini has discovered that Saturn's B Ring is made of tightly bound clumps of particles that are constantly colliding. Originally it was thought that the Rings were uniform clouds of small particles. This caused the mass of the system to be underestimated. The Rings may be 2-3 times as massive as previously thought. Particles in the B Ring must spend most of their time in clumps or moving from one clump to another.
Kea has posted yet another excellent picture of the Rings. Below we see Atlas orbiting outside A Ring, with tiny moon Daphnis inside the Keeler Gap. Daphnis is a bigger clump which keeps the Gap open. Since the Rings have many tiny gaps, this blog long ago predicted that the rings were full of massive objects. There is much more here than meets the eye.
H.G Wells' Invisible Man was finally discovered by tracks he left in snow. Saturn's Rings are literally a field of ice in which the tracks of invisible objects can be seen. If our Solar System contains tiny Black Holes, this is a good place to look. Presence of singularities would explain how these clumps form in the first place. The Rings show conditions similiar to our Solar System's formation. Singularities may be the key to how Earth and the planets were created.