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2500-15-large satellites

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

Titan Point #5<br />

JUPITER Has a Much Larger Mass<br />

Than SATURN, and Therefore, a<br />

Much Larger Gravitational<br />

Attraction<br />

• Comets Colliding with Ganymede and Callisto<br />

Would Crash with Much Higher Energy Than<br />

Those Hitting Titan<br />

• Ganymede and Callisto Were Unable to Retain<br />

Gases After Impact; Whereas Titan, with Lower<br />

Energy Impacts, in the Colder URANUS-<br />

NEPTUNE Region, Was Able to Retain Gases

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