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<p><font size="2"><strong>Interesting, not the first time i've seen that a planetary moon may had 'recently' been thrown into a more elliptical orbit then settle back down into a more circular one. </strong></font></p><p><font size="2"><strong>Ganymede, Jupiter's giant moon, 1 GYA & much more recently with Saturn's Enceladus 30 MYA? What would really interest me, is what caused both to leave circular Jovecentric & Kronecentric orbits respectively in the first place?</strong></font></p><p><strong><font size="2">Current tidal heating appears to be woefully inadequate to keep Enceladus from freezing to the centre, like the inner neighbour Mimas.</font></strong></p><p><font size="2" color="#000080"><strong>Enceladus faces a frozen future as it freezes.</strong></font></p><p><strong><font size="2">Andrew Brown.</font></strong>http://www.space.com/scienceastronomy/080619-am-enceladus-ocean.html</p> <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p><font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br /><font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p><font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>