An apparent dark gap in Saturn's rings. The Cassini division falls between Saturn's A-ring and B-ring. Data from the Voyager I and Voyager II missions revealed that the Cassini division is not a void but a zone where the population of dust particles is much lower than either the A-ring or B-ring. The Cassini division was discovered by Giovanni Cassini in 1675.

The main division between Saturn's largest rings (A and B rings).

A 5000-km gap in Saturn's ring system observable through small telescopes and clear skies. G.D. Cassini discovered this dark gap in Saturn's rings in 1675.

The principal division in Saturn's ring system, separating ring A from ring B.