New class of meteorites discovered?

[MeteorWayne]

<p><strong>A pair of meteorites discovered in Antarctica are in a class all of their own, a major space conference has been told. </strong></p><p>Studies of the extra-terrestrial rocks have revealed qualities that set them apart from any meteorites previously known to science. </p><p>Researchers are pondering where in our Solar System the meteorites could have originated. </p><p>An origin on Planet Venus has been discussed, but now looks unlikely. </p><p>http://news.bbc.co.uk/1/hi/sci/tech/7294181.stm</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>

 

[3488]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'><font color="#800000">A pair of meteorites discovered in Antarctica are in a class all of their own, a major space conference has been told. Studies of the extra-terrestrial rocks have revealed qualities that set them apart from any meteorites previously known to science. Researchers are pondering where in our Solar System the meteorites could have originated. An origin on Planet Venus has been discussed, but now looks unlikely. http://news.bbc.co.uk/1/hi/sci/tech/7294181.stm <br />Posted by meteorwayne</font></DIV></p><p><font size="2" color="#333300"><strong>Cheers MeteorWayne,</strong></font></p><p><font size="2" color="#333300"><strong>Perhaps from Mercury???? Anyway, thank you very much, very, very interesting.</strong></font></p><font size="2" color="#333300"><strong>I would have thought that Venus would be less likely due to its strong gravitational pull, but you never know. Or from a main belt asteroid???</strong></font><font size="2" color="#333300"><strong> <p>Andrew Brown.</p></strong></font> <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>

 

[JonClarke]

<p>Very cool, or, given the possible sources, should that be very hot?</p><p>The number of differentiated rocky bodies in the solar system is small.&nbsp; The earth, Moon, Mars, and Vesta have been ruled out.</p><p>That leaves Venus, Io, Mercury, and possibly Ceres.&nbsp; Ion is dynamically almost impossible - too far into Jupiter's gravity well.&nbsp; Venus is difficult too, because of the atmosphere.&nbsp; That leaves either Mercury of Ceres.&nbsp; But unlike Vesta, Ceres shows no sign of a massive impact, so Mercury is the most lilley possibility.</p><p>or they could have been ejected be from a body that has been completely destroyed since.&nbsp; that would be exciting.</p><p>cheers</p><p>Jon<br /></p> <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em>  Arthur Clarke</p> </div>

 

[MeteorWayne]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Very cool, or, given the possible sources, should that be very hot?The number of differentiated rocky bodies in the solar system is small.&nbsp; The earth, Moon, Mars, and Vesta have been ruled out.That leaves Venus, Io, Mercury, and possibly Ceres.&nbsp; Ion is dynamically almost impossible - too far into Jupiter's gravity well.&nbsp; Venus is difficult too, because of the atmosphere.&nbsp; That leaves either Mercury of Ceres.&nbsp; But unlike Vesta, Ceres shows no sign of a massive impact, so Mercury is the most lilley possibility.or they could have been ejected be from a body that has been completely destroyed since.&nbsp; that would be exciting.cheersJon <br />Posted by jonclarke</DIV><br />Wasn't there indications of a large crater on Ceres?</p><p>I seem to have some memory of that.</p><p>We'll find out in a few years </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>

 

[3488]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'><font color="#ff0000">Wasn't there indications of a large crater on Ceres?I seem to have some memory of that.We'll find out in a few years <br />Posted by meteorwayne</font></DIV></p><p><font size="2" color="#333300"><strong>Hi MeteorWayne, yes 1 Ceres does have a large crater as does 4 Vesta. I think 4 Vesta has been ruled out for composition reasons. 1 Ceres below. Keck&nbsp;AO.&nbsp;</strong></font></p><p><font size="2" color="#333300"><strong><img src="http://sitelife.space.com/ver1.0/Content/images/store/12/6/fccfa376-516d-465e-8638-d20d5469bf9b.Medium.jpg" alt="" /></strong></font></p><p><font size="2" color="#333300"><strong>2 Pallas is another possibily, certainly large enough to be differentiated & appears to have Olivine on the surface in places, which suggests to me lava flows & therefore differentiation.</strong></font></p><p><font size="2" color="#333300"><strong>1 Ceres does seem very likely a possible source. </strong></font></p><p><font size="2" color="#333300"><strong>Now Io, to me needless to say (my avatar is evidence)&nbsp;is perhaps the most exciting possibilty. If we have pieces of Io on Earth, perhaps they will tell us something about the volcanic & differentiation history of that fascinating Jovian moon.<br /></strong></font></p><p><font size="2" color="#333300"><strong>Like Jon, I have doubts due to the strength of Jove's gravity on Io. Jupiters's pull on Io, is not much less than that of the Sun on Mars, so Io would have had to be hit, very hard for pieces of Io's crust to escape from that gravity well, though I suppose, encounters with Europa, Ganymede & Callisto could eject it.</strong></font></p><p><font size="2" color="#333300"><strong>Still think that Mercury is a possibilty, though once again, Mercury's own fairly strong gravity & the depth of the Sun's gravity well there, would make Mercury a very difficult point of origin.</strong></font></p><p><font size="2" color="#333300"><strong>W</strong></font><font size="2" color="#333300"><strong>hat about asteroid 10 Hygeia, the fourth largest in the Asteroid Belt? 500 KM x 380 KM x 350 KM.<br /><br />Andrew Brown.</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>

 

[JonClarke]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Wasn't there indications of a large crater on Ceres?I seem to have some memory of that.We'll find out in a few years <br />Posted by meteorwayne</DIV></p><p>I remembered that crater too, but it isn't really that large as things go.&nbsp; But then, maaybe that is why meteorites from Ceres are so rare.&nbsp; if that is where they are from.</p><p>Jon</p> <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em>  Arthur Clarke</p> </div>