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2500-15-large satellites

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<strong>15</strong>.7 Comparing the Large Satellites<br />

Titan Point #1<br />

• Did Titan Capture Its Atmosphere from<br />

the Primary Nebula<br />

or<br />

• Was the Atmosphere Formed by the<br />

Release of Gases from the Solid Bulk<br />

Material of Titan<br />

• The Primary Nebula Contained Nearly Equal<br />

Amounts of Nitrogen and Neon<br />

(Determined by the Present Composition of the SUN)<br />

• Ultraviolet Spectrometer on Voyager 1 Showed<br />

Almost No Evidence of Neon (Upper Limit of 0.1 %)

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