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1 .This is Scientific American's 60-Second Space, I'm John Matson. Got a minute?
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2 .Saturn's rings and moons are a diverse group,
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3 .but some of their differences are only skin deep.
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4 .A new analysis of the Saturnian system shows that the planet's rings and satellites have at least one compositional characteristic in common.
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5 .They appear uniformly stocked with water ice, dating from their formation in the early solar system.
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6 .Researchers examined six years of Saturn observations from NASA's Cassini orbiter,
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7 .which can detect ice as well as the colorful contaminants that obscure it, such as iron or hydrocarbons.
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8 .The inner moons are largely devoid of such coloration, thanks to a fresh coat of icy material that spews out from the moon Enceladus.
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9 .And the outer moons are dusted with dark stuff, which looks to be debris from Phoebe, a dark-colored lump of a moon.
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10 .But underneath those surface differences is a uniform distribution of water ice,
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11 .which seems to reflect the common origins of the moons and rings billions of years ago.
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12 .The research appears in the Astrophysical Journal.
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13 .The rings and moons, polluted and tinted though they may be now,
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14 .therefore appear to preserve a record of their beginnings, frozen in time and space.
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15 .Thanks for the minute, for Scientific American's 60-Second Space. I'm John Matson.
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