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See Saturn Now: Lord of the Rings Rocks

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Bianca
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« on: February 22, 2008, 12:39:26 pm »









Some Saturn stats



At an average distance of 886 million miles (1.43 billion km.) from the sun, or about
twice as far away as Jupiter, Saturn goes around the sun once in 29.5 Earth-years.
Second only to Jupiter in size at 74,900 mi (120,500 km), it's more than nine times
the size of our Earth. Like Jupiter, it's wrapped in thick clouds which run in parallel
bands across its disk.


At last count, Saturn has 61 satellites; the largest one, Titan, appears as a star of
eighth magnitude and appears to orbit Saturn in about 16-days.


But the really impressive feature of Saturn is its famous ring system.


These rings are not continuous sheets, but are actually composed of countless
billions of particles which range in size from microscopic specks to boulders the
size of houses, each one circling like a moon around Saturn and reflecting sunlight.
Most of these are composed of water ice.


Through a good-sized telescope the rings appear as two bright ones with a narrow
dark space between them — called the Cassini Division, discovered in 1675 — and
the fainter "crape ring" nearer to the ball of the planet, which is not quite so easy
to see. These are considered the Main Rings and measure about 170,000 miles
(273,500 km.) across, although over the past 30 years several other much fainter
rings have been identified from images taken by the Pioneer 11 and Voyager space
probes. These are referred to as the Dusty Rings.


The width of the entire ring system, including gaps, is about 258,500 mi (416,000 km).
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