Cassini Spacecraft Enceladus E6 Encounter. 31/10/08.

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3488

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<p><font size="2"><strong>Cassini Spacecraft on Friday 31st October 2008, will pass through the plumes of Enceladus.</strong></font></p><p><font size="2"><strong>A real trick or treat in space this Hallow'een.</strong></font></p><p><font size="2"><strong>Cassini will employ the same SKEET imaging technique as was used back in August to image the Tiger Stripes with a resolution of only a few metres.</strong></font></p><p><font size="2"><strong>Other remote sensing instruments such as CIRS, will measure temperatures, etc.&nbsp;</strong></font></p><p><font size="2"><strong>The CDA will measure the densities of the partcles within the plumes.&nbsp;</strong></font></p><p><font size="2"><strong>Andrew Brown.&nbsp;</strong></font></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>
 
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3488

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<p><font size="4">Approach image northern hemisphere from approx 515,900 KM.</font></p><p><strong><font size="2">Saturnshine on the nightside on right most obvious.</font></strong><br /><img src="http://sitelife.space.com/ver1.0/Content/images/store/5/4/d5aa261b-a5e6-4ed2-b40d-5be44723b681.Medium.jpg" alt="" /></p><p><font size="2"><strong>Andrew Brown.&nbsp;</strong></font></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>
 
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3488

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<p><font size="4">First close up from the Hallow'een 2008 Enceladus E6 Encounter.</font></p><p><strong><font size="2">Towards the bottom right, some of the ice boulders on Enceladus are visible.</font></strong><br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/9/11/09250eae-088a-4fee-8ba5-00f7a87ec0f7.Medium.jpg" alt="" /></p><p><br /><font size="2"><strong>Andrew Brown.&nbsp;</strong></font></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>
 
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3488

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<p><strong><font size="2">These just in.</font></strong></p><p><strong><font size="2">Hallow'een E6 encounter.</font></strong></p><p><font size="5">Baghdad Sulcus SKEET mosaic. </font></p><p><strong><font size="2">Resolution 12.3 metres per pixel.</font></strong><br />&nbsp;<img src="http://sitelife.space.com/ver1.0/Content/images/store/13/13/cd6c0817-1e68-4d72-bd4b-e41cc465210f.Medium.jpg" alt="" /></p><p><font size="5">High resolution of 'Pressure Ridges' & ice boulders.</font></p><p><strong><font size="2">Resolution 9 metres per pixel.</font></strong><br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/14/11/def6e0ba-248a-4c61-ab1b-2da6500a73ae.Medium.jpg" alt="" /></p><p><font size="5"><br />Damascus Sulcus. </font></p><p><strong><font size="2">Resolution 31 metres per pixel. Sources of plumes 2 & 3 identified.</font></strong><br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/13/6/cd8fe749-a8af-4919-9630-0974c29535e4.Medium.jpg" alt="" /></p><p><br /><font size="5">Baghdad Sulcus from a little further out.&nbsp; </font></p><p>http://ciclops.org/view_media/25963/Enceladus_Rev_91_Flyby_-_Skeet_Shoot_1-4_Mosaic<strong><font size="2">Resolution 35 metres per pixel. Source of plume7 identified.</font></strong><br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/14/10/7e0b83be-44ab-4ba3-aabd-efa5ddf8125d.Medium.jpg" alt="" /></p><p><font size="2"><strong>Andrew Brown.&nbsp;</strong></font></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>
 
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nimbus

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The links above your pictures don't lead anywhere Andrew. &nbsp;Are they supposed to be external images like you usualy do?&nbsp; <div class="Discussion_UserSignature"> </div>
 
A

anthmartian

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<p>Truly stunning images Andrew! Thankyou.</p><p>A whole lot more interesting than the plumbing work i am tackling right now. Off to get it finished so i can have a detailed viewing. </p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em>"Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"</em></font></p><p><font color="#33cccc"><strong>Han Solo - 1977 - A long time ago in a galaxy far far away....</strong></font></p><p><br /><br />Click Here And jump over to my site.<br /></p> </div>
 
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3488

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Replying to:<br /><div class="Discussion_PostQuote"><font color="#ff0000">The links above your pictures don't lead anywhere Andrew. &nbsp;Are they supposed to be external images like you usualy do?&nbsp; <br /> Posted by nimbus</font></div> <p><font size="2"><strong>Hi Nimbus, Pluck appeared to have cancelled the links I provided. It has just taken me several goes to relink them. I think there is a problem. It seems to be working now.</strong></font></p><p>Replying to:</p><div class="Discussion_PostQuote"><font color="#ff0000">Truly stunning images Andrew! Thankyou.A whole lot more interesting than the plumbing work i am tackling right now. Off to get it finished so i can have a detailed viewing. <br /> Posted by anthmartian</font></div><p><font size="2"><strong>Amazing stuff indeed Anth.</strong></font></p><p><font size="2"><strong>It looks like we've seen the best images, the 9.3 metre reso one is certainly the sharpest one from the encounter. I hope also that the SKEET technique will be employed for the Dione, Helene & Rhea encounters.</strong></font></p><p><font size="2"><strong>I have suggested to CICPLOPS that perhaps they could share that technique with the MESSENGER, DAWN & New Horizons teams, as that could be used at Mercury, 4 Vesta, 1 Ceres & Pluto.&nbsp;</strong></font></p><p><font size="5">Also a context image with SKEET locations shown</font>. <br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/3/1/733bf12c-01ae-4b2c-81c7-a8ea013a2541.Medium.jpg" alt="" /><br />&nbsp;</p><p><font size="2"><strong>Andrew Brown. <br /></strong></font></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>
 
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anthmartian

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<p>Andrew : I did some animations with those images just now, a sort of flight over the terrain, with a 3d perspective. HDTV resolution, it blew me away! Seeing them on a big screen with the landscape going past was astounding.</p><p> I have postponed my other projects to work on another Enceladus video featuring those. Taking in the stuff i missed from the summer too on the previous movie.</p><p>I agree, it will be very exciting to see skeet imagery of other moons. </p><p>Every time something like this happens i thank my lucky stars i am here right now to see it. I know the 60's were exciting for space exploration, being born in 1969 i missed the party. But, for me this is real frontier exploration happening right now. It does not matter to me that my astronaut heroes are robots, and not flesh and blood!</p><p>I would post this gladly every day, but i would probably be banned for repeating myself. Anybody reading this thread who may be responsible in any way shape or form for these fantastic endeavours by these craft, i thank you for enriching our lives and making this such a special time to be a follower of space exploration. Every time i think things cannot get much better, they do!</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em>"Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"</em></font></p><p><font color="#33cccc"><strong>Han Solo - 1977 - A long time ago in a galaxy far far away....</strong></font></p><p><br /><br />Click Here And jump over to my site.<br /></p> </div>
 
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3488

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<p><strong><font size="2">Hi Anth, </font></strong></p><p><strong><font size="2">I will reply to you properly later when I have time, but I will say I agree 100%. </font></strong></p><p><strong><font size="2">Don't worry about getting banned, that will never happen with you, I am very sure of that fact.</font></strong><img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-laughing.gif" border="0" alt="Laughing" title="Laughing" /></p><p><strong><font size="2">Hi everyone,</font></strong> </p><p><font size="5">Quite an amazing shot from approx 4,100 KM.</font><br /><img src="http://sitelife.space.com/ver1.0/Content/images/store/15/5/dffea0d0-b3d0-45c3-95f2-4b736f9cd795.Medium.jpg" alt="" /></p><p><font size="5">Enceladus from 2,090 KM.</font><br /><img src="http://sitelife.space.com/ver1.0/Content/images/store/0/1/30f94041-4287-4a2a-b179-feeba9f4e04e.Medium.jpg" alt="" /></p><p><font size="5"><font size="5">Enceladus from 3,139 KM.</font></font><br /><img src="http://sitelife.space.com/ver1.0/Content/images/store/4/11/c44bca66-8e9e-4c8c-9bd3-0e4af4eb62b4.Medium.jpg" alt="" /></p><p><strong><font size="2">Andrew Brown.</font></strong></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>
 
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silylene old

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Hi Anth, I will reply to you properly later when I have time, but I will say I agree 100%. Don't worry about getting banned, that will never happen with you, I am very sure of that fact.Hi everyone, Quite an amazing shot from approx 4,100 KM.Enceladus from 2,090 KM.Enceladus from 3,139 KM.Andrew Brown. <br />Posted by 3488</DIV></p><p>I liked this close up shot: http://antwrp.gsfc.nasa.gov/apod/image/0811/enceladusupclose_cassini_big.jpg</p><p>What I found particularly intriguing was the presence of so many 'bus sized' boulders&nbsp;decorating almost every square meter of&nbsp;every surface, so it looked pebbly.&nbsp; And as far as I could tell, these boulders seem rather similarly sized (as opposed to have a broader ranger of size distribution, or a power law distribution of sizes).&nbsp; I'd love to see a size distribution count.</p><p>So how did so many boulders come to be littering the surface?&nbsp; It looks textured with these boulder balls.&nbsp; If you look closely in some spots, you can see that the bus sized boulders&nbsp;seem to be stacked rather loosely on top of each other, who knows how deep?&nbsp;&nbsp; I wonder how they formed.</p> <div class="Discussion_UserSignature"> <div class="Discussion_UserSignature" align="center"><em><font color="#0000ff">- - - - - - - - - - - - - - - - - - - - - -</font></em> </div><div class="Discussion_UserSignature" align="center"><font color="#0000ff"><em>I really, really, really miss the "first unread post" function.</em></font> </div> </div>
 
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3488

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<p>H<strong><font size="2">i silylene,</font></strong></p><p><strong><font size="2">I'm only just getting round to looking at these images properly now.</font></strong></p><p><strong><font size="2">Of course boulders can be formed by several processes, such as on many other Saturn moons like Rhea, they would be impact ejecta, but I think here, it is certainly due to the grinding together of ice plates. </font></strong></p><p><strong><font size="2">Pressure ridges are visible in the image you linked too, thus giving support to my own theory of ice plates tectonics grinding ice & creating boulders.</font></strong></p><p><strong><font size="2">As you say, they really need to be mapped & the size / distribution of said boulders.</font></strong></p><p><strong><font size="2">Andrew Brown.&nbsp;</font></strong></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>
 
M

MeteorWayne

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<p><br />Latest News from the AGU meeting...</p><p><span class="bold">Saturn's Dynamic Moon Enceladus Shows More Signs of Activity </span></p><p>SAN FRANCISCO -- The closer scientists look at Saturn's small moon Enceladus, the more they find evidence of an active world. The most recent flybys of Enceladus made by NASA's Cassini spacecraft have provided new signs of ongoing changes on and around the moon. The latest high-resolution images of Enceladus show signs that the south polar surface changes over time. <br /><br />Close views of the southern polar region, where jets of water vapor and icy particles spew from vents within the moon's distinctive "tiger stripe" fractures, provide surprising evidence of Earth-like tectonics. They yield new insight into what may be happening within the fractures. The latest data on the plume -- the huge cloud of vapor and particles fed by the jets that extend into space -- show it varies over time and has a far-reaching effect on Saturn's magnetosphere. <br /><br />"Of all the geologic provinces in the Saturn system that Cassini has explored, none has been more thrilling or carries greater implications than the region at the southernmost portion of Enceladus," said panel member Carolyn Porco, Cassini imaging team leader at the Space Science Institute in Boulder, Colo. <br /><br />A panel of Cassini scientists presented these new findings Monday in a news briefing at the American Geophysical Union's Fall Meeting in San Francisco. <br /><br />"Enceladus has Earth-like spreading of the icy crust, but with an exotic difference -- the spreading is almost all in one direction, like a conveyor belt," said panelist Paul Helfenstein, Cassini imaging associate at Cornell University in Ithaca, N.Y. "Asymmetric spreading like this is unusual on Earth and not well understood." <br /><br />"Enceladus has asymmetric spreading on steroids," Helfenstein added. "We are not certain about the geological mechanisms that control the spreading, but we see patterns of divergence and mountain-building similar to what we see on Earth, which suggests that subsurface heat and convection are involved." <br /><br />The tiger stripes are analogous to the mid-ocean ridges on Earth's seafloor where volcanic material wells up and creates new crust. Using Cassini-based digital maps of the moon's south polar region, Helfenstein reconstructed a possible history of the tiger stripes by working backward in time and progressively snipping away older and older sections of the map, each time finding that the remaining sections fit together like puzzle pieces. <br /><br />Images from recent close flybys also have bolstered an idea the Cassini imaging team has that condensation from the jets erupting from the surface may create ice plugs that close off old vents and force new vents to open. The opening and clogging of vents also corresponds with measurements indicating the plume varies from month to month and year to year. <br /><br />"We see no obvious distinguishing markings on the surface in the immediate vicinity of each jet source, which suggests that the vents may open and close and thus migrate up and down the fractures over time," Porco said. "Over time, the particles that rain down onto the surface from the jets may form a continuous blanket of snow along a fracture." <br /><br />Enceladus' output of ice and vapor dramatically impacts the entire Saturnian system by supplying the ring system with fresh material and loading ionized gas from water vapor into Saturn's magnetosphere. <br /><br />"The ions added to the magnetosphere are spun up from Enceladus' orbital speed to the rotational speed of Saturn," said Cassini magnetometer science team member Christopher Russell of the University of California, Los Angeles. "The more material is added by the plume, the harder this is for Saturn to do, and the longer it takes to accelerate the new material." <br /><br />With water vapor, organic compounds and excess heat emerging from Enceladus' south polar terrain, scientists are intrigued by the possibility of a liquid-water-rich habitable zone beneath the moon's south pole. <br /><br />Cassini's flybys on Aug. 11 and Oct. 31 targeted Enceladus' fractured southern region. An Oct. 9 flyby took the spacecraft deep into the plume of water vapor and ice shooting out of the moon's vents. Cassini's next flyby of Enceladus will be in November 2009. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. </p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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