<div align="center">Planetary Science Seminar</div>
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<div align="center">Friday November 9 at Noon</div>
<div align="center">EPS Faculty Lounge, 4th floor Hoffman Laboratory, 20 Oxford St.</div>
<div align="center">Pizza provided<br> </div><span></span>
<div align="center"><span>Old Faithful, Cold Faithful, and Frigid Faithful: What's Happening on Enceladus? </span></div><span>
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<div align="center"><span>Susan W. <span name="st"><span name="st"><span class="st" id="st" name="st">Kieffer</span></span></span></span></div>
<div align="center"><span>University of Illinois at Urbana-Champaign</span></div>
<div align="left"><br>Abstract: Enceladus is a tectonically active, small and frigid satellite of Saturn. <span> </span>Therefore it was of considerable surprise that the magnetometer, imaging and thermal systems on the Cassini spacecraft descovered active plumes erupting from warm spots at the south pole.
<span> </span>These plumes soar hundreds of kilometers into the vacuous atmosphere, replenishing ice particles into the E-ring of Saturn. <span> </span>In this talk, we'll review terrestrial geyser dynamics, and examine the two proposed explanations for the plume of Enceladus: eruption of water from liquid reservoirs near the surface or eruption of water and other gases from a colder subsurface clathrate reservoir.
<span> </span>The clathrate reservoir model accounts for the plume observations as well as major features of the south polar tectonic terrains.</div>
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