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Cassini division

   Also found in: Hutchinson 0.02 sec.
Cassini division
n.
The large gap between the two most prominent of Saturn's rings, caused by the gravitational pull of the moon Mimas.
[After Giovanni Domenico Cassini (1625-1712), Italian astronomer.]
Cassini division  (k-sn)
The large gap between Saturn's two most prominent rings (the outer A ring and middle B ring), appearing as a dark void but actually containing small amounts of opaque material. It is formed as a result of particles being removed from the area by the gravitational pull of Mimas, one of the smaller of Saturn's moons. The division is named after the Italian astronomer, Giovanni D. Cassini (1625-1712), who discovered it in 1675.


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These ringlets showed up in the Cassini Division, a large gap between Saturn's third and fourth main rings.
Ring shots: Cassini spies new bands, other features, around Saturn by Cowen, Ron / Science News
In a quartet of novels--The Star Fraction (1995), The Stone Canal (1996), The Cassini Division (1998), and The Sky Road (1999)--MacLeod sets up several societies then lets them loose in something akin to the real world, where they can compete, infiltrate each other, and try to come to terms with their internal contradictions.
Anarchies, States, and Utopias by Walker, Jesse / Reason
The large gap between rings B and A is called the Cassini division.
Groovy Science: Cassini gets the skinny on Saturn's rings by Cowen, Ron / Science News
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