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physical object > natural object > celestial body > ring gap > Cassini's division

Cassini's division
subject			fact

Cassini's division	is a part of Saturn ring system
	has width 1800 km
	has discovery date 1675
	has discoverer Cassini
	has definition A gap between the outermost rings of Saturn. The period of a particle in Cassini's division is about two-thirds that of Janus, one-half that of Mimas, one-third that of Enceladus, and one-quarter that of Tethys.
	is a kind of ring gap
ring gap	is a part of Saturn ring system
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

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