[meteorite-list] Rocks from Space Picture of the Day - March 14, 2008
http://www.rocksfromspace.org/March_14_2008.html **It's Tax Time! Get tips, forms, and advice on AOL Money Finance. (http://money.aol.com/tax?NCID=aolprf000301) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Motta di Conti
here 2 photos of the Motta di Conti over 6 kg. main mass now exposed with other 90 meteorites in the Bologna Mineral Show http://i32.tinypic.com/bhxb0p.jpg http://i31.tinypic.com/2h49sg6.jpg Matteo __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] sacramento wash 005
Hi again list.If someone wants to make some money I am looking for some more SACRAMENTO WASH 005.The former franconia irons.I am looking for more of the 2 to 10 gram range.Please let me know offlist.Thanks and have a great day. Steve R.Arnold,chicago,Ill,Usa!! The Asteroid Belt! http://chicagometeorites.net/ Collecting Meteorites since 06/19/1999 Ebay I.D. Illinoismeteorites Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Oriented Erg Chech To Fall in Love With
Hello All, There are now 6 Erg Chech pieces in my collection + an Erg Chech thin section. The TS comes from Philippe Thomas, a 20.32-gram slice (IMB variety) comes from Andi Gren, the other 5 specimens are all from Philippe Thomas and they are all top quality, fusion-crusted pieces and are definitely flight-marked. Today I got my 11.46-gram individual (purchased on EBay from Philippe) and this piece is clearly *flight-oriented* because it features conspicuous radial flow lines with a roll-over lip and a warty rear side. Where fusion crust has been spalled off, you can see distinct chondrules embedded into the greyish lithology of the brecciated matrix. There are plenty of thick, molten and solidified metal blebs and in a small crack of the warty rear side you can even see shiny metal protruding through a tiny part of this crack. Philippe and Léa, thank you so much for this beauty! Shakespeare in Love, ... no, Bernd in love with his little, oriented Erg Chech ;-) To: Meteorite-list@meteoritecentral.com Cc: [EMAIL PROTECTED] __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Photos of the slice
Needs no other name-- THE single nicest meteorite slice on the planet. http://blogs.nature.com/news/blog/2008/03/lpsc_worth_its_weight_in_gold.html __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Photos of the slice
Darren you have a knack of finding these intriguing webs sites. Heck this slice is only several magnitudes larger of my mirco NWA 482. Mine too supposedly came from the far side and it too is under intense study. So as far as science is concerned if that's the only criteria, then my teeny tiny is just as important, just quite not as ostentatious. DROOL, DROOL, DROOL Jerry Flaherty - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Friday, March 14, 2008 4:03 PM Subject: [meteorite-list] Photos of the slice Needs no other name-- THE single nicest meteorite slice on the planet. http://blogs.nature.com/news/blog/2008/03/lpsc_worth_its_weight_in_gold.html __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Photos of the slice
I must say YES... Fred www.meteoriteshow.com - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Friday, March 14, 2008 8:03 PM Subject: [meteorite-list] Photos of the slice Needs no other name-- THE single nicest meteorite slice on the planet. http://blogs.nature.com/news/blog/2008/03/lpsc_worth_its_weight_in_gold.html __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] GRA 06128 and GRA 06129: Antarctica's unique space rocks
Hi All, I know that for the past months i have not always been able to follow the meteorites' news since i am in Ghana... But i have just seen tonight on the BBC that a pair of meteorites found in Antarctica are of a class of their own... Since i have the chance to have an internet connection available tonight, i tried Google about this news and was of course directed to the BBC website : http://news.bbc.co.uk/2/hi/science/nature/7294181.stm Does anybody know a bit more about these meteorites? Did i miss any post on that topic in the recent days? Thanks and kind regards, Frederic www.meteoriteshow.com __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] GRA 06128 GRA 06129
More information @ http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1825.pdf Cheers Fred www.meteoriteshow.com __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] GRA 06128 GRA 06129
please remove me - Original Message - From: Meteoriteshow [EMAIL PROTECTED] To: Meteorite List Meteoritecentral meteorite-list@meteoritecentral.com Sent: Friday, March 14, 2008 5:24 PM Subject: [meteorite-list] GRA 06128 GRA 06129 More information @ http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1825.pdf Cheers Fred www.meteoriteshow.com __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Cassini Flies Through Watery Plumes of Saturn Moon Enceladus
http://www.jpl.nasa.gov/news/news.cfm?release=2008-044 Cassini Flies Through Watery Plumes of Saturn Moon Jet Propulsion Laboratory March 13, 2008 NASA's Cassini spacecraft performed a daring flyby of Saturn's moon Enceladus on Wed., March 12, flying about 15 kilometers per second (32,000 mph) through icy water geyser-like jets. The spacecraft snatched up precious samples that might point to a water ocean or organics inside the little moon. Scientists believe the geysers could provide evidence that liquid water is trapped under the icy crust of Enceladus. The geysers emanate from fractures running along the moon's south pole, spewing out water vapor at approximately 400 meters per second (800 mph). The new data provide a much more detailed look at the fractures that modify the surface and will give a significantly improved comparison between the geologic history of the moon's north pole and south pole. New images show that compared to much of the southern hemisphere on Enceladus--the south polar region in particular--the north polar region is much older and pitted with craters of various sizes. These craters are captured at different stages of disruption and alteration by tectonic activity, and probably from past heating from below. Many of the craters seem sliced by small parallel cracks that appear to be ubiquitous throughout the old cratered terrains on Enceladus. These new images are showing us in great detail how the moon's north pole differs from the south, an important comparison for working out the moon's obviously complex geological history, said Carolyn Porco, Cassini imaging team leader, Space Science Institute, Boulder, Colo. And the success of yesterday's daring and very low-altitude flyby means this coming summer's very close encounter, when we get exquisitely detailed images of the surface sources of Enceladus' south polar jets, should be an exciting 'next big step' in understanding just how the jets are powered. This week's flyby and another one planned for Oct. 9, 2008, were designed so that Cassini's particle analyzers could dissect the body of the plume for information on the density, size, composition and speed of the particles. Among other things, scientists will use the data gathered this week to figure out whether the gases from the plume match the gases that make up the halo of particles around Enceladus. This may help determine how the plumes formed. During Cassini's closest approach, two instruments were collecting data--the Cosmic Dust Analyzer and the Ion and Neutral Mass Spectrometer. An unexplained software hiccup with Cassini's Cosmic Dust Analyzer instrument prevented it from collecting any data during closest approach, although the instrument did get data before and after the approach. During the flyby, the instrument was switching between two versions of software programs. The new version was designed to increase the ability to count particle hits by several hundred hits per second. The other four fields and particles instruments on the spacecraft, in addition to the ion and neutral mass spectrometer, did capture all of their data, which will complement the overall composition studies and elucidate the unique plume environment of Enceladus. Cassini's instruments discovered evidence for the geyser-like jets on Enceladus in 2005, finding that the continuous eruptions of ice water create a gigantic halo of ice dust and gas around Enceladus, which helps supply material to Saturn's E-ring. This was the first of four Cassini flybys of Enceladus this year. During Wednesday's flyby, the spacecraft came within 50 kilometers (30 miles) of the surface at closest approach, 200 kilometers (120 miles) while flying through the plume. Future trips may bring Cassini even closer to the surface of Enceladus. Cassini will complete its prime mission, a four-year tour of Saturn, in June. From then on, a proposed extended mission would include seven more Enceladus flybys. The next Enceladus flyby would take place in August of this year. For more images and more information, visit: http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov . The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate, Washington. The Cassini orbiter was designed, developed and assembled at JPL. Media Contact: Carolina Martinez 818-354-9382 Jet Propulsion Laboratory, Pasadena, Calif. [EMAIL PROTECTED] Preston Dyches 720-974-5859 Space Science Institute, Boulder, Colo. [EMAIL PROTECTED] 2008-044 __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorites May Be Remnants of Destroyed Dwarf Planet
http://space.newscientist.com/article/dn13456-meteorites-may-be-%20remnants-of-destroyed-dwarf-planet.html Meteorites may be remnants of destroyed dwarf planet David Shiga New Scientist 13 March 2008 Two rocks found together in Antarctica are chunks of a dwarf planet that was smashed apart early in the solar system's history, detailed studies suggest. Other remnants of the proto-world may still be floating around in the asteroid belt, and might be identifiable by the spectrum of the sunlight they reflect. In the solar system's first few tens of millions of years, collisions between rocky objects and the decay of radioactive isotopes melted the interiors of large objects. Magma oceans - perhaps hundreds of kilometres deep - lapped over the Moon, the Earth, and other large bodies, allowing dense material to settle towards their centres in a process called differentiation. The two meteorite pieces, called GRA 06128 and GRA 06129 after the Graves Nunataks area of Antarctica where they were found together in 2006, show evidence of such differentiation - which suggests they came from a massive body. That's because the two objects are made mostly of a mineral called feldspar, which constitutes about 75 to 90% of their volume. Feldspar is even more abundant in some lunar rocks. That is thought to be the result of crystals of feldspar solidifying from the early magma ocean on the Moon. Because feldspar is a relatively lightweight mineral, it would have floated to the top of the magma ocean, allowing it to form a highly concentrated layer of the mineral. The amount of feldspar in the two meteorite fragments suggests they are remnants of a very large body that differentiated in a similar way, according to Allan Treiman of the Lunar and Planetary Institute in Houston, Texas, US, who led a study of one of the fragments. 'Strange new world' Other studies of the meteorite, including one led by Richard Ash of the University of Maryland in College Park, another headed by Chip Shearer of the University of New Mexico in Albuquerque, and a third helmed by Ryan Zeigler of Washington University in St Louis, Missouri, all in the US, agree that the parent body must have been massive enough to have separated into layers. The feldspar concentrations suggest that body was probably smaller than the 3500-kilometre-wide Moon but larger than Vesta, the third largest asteroid in the solar system at 578 kilometres across, says Treiman. That's because meteorites believed to be from Vesta contain solidified lava, but not large concentrations of feldspar. That suggests that Vesta was massive enough to melt, but not so massive that it differentiated to form a distinct layer of the mineral. This is a piece of a dwarf-planet size body that apparently no longer exists, Treiman told New Scientist. We have here a sample of a strange new world, a sample we've never seen before. Ancient era Zeigler, however, says the newly studied meteorites share similarities with a class of meteorites called brachinites, whose parent body appears to have been large enough to partially melt. I think we can make a case that [the new discovery] is from the brachinite parent body [but] I don't think we can say it definitively yet, he says. The meteorites' composition has led scientists to rule out the possibility that they are chips off of the Moon, Mars or Venus. And the ratio of iron to manganese does not match that of Earth, ruling out the possibility that it is an old chunk blasted off our planet's surface that later returned. By measuring the radioactive decay of elements in the meteorite, scientists led by Richard Ash have shown that the rock must have formed around 4.5 billion years ago, when Earth and the other planets were coalescing. Studying these fragments of a now-vanished object from that era provides a rare window into the early solar system, Treiman says. At that time, a lot of dwarf-planet size objects were flying around the solar system. Some would have been flung out of the solar system through gravitational interactions with other objects, while others collided to help build the planets present in the solar system today. Remnant fragments We're looking maybe at a part of solar system history when dwarf planets were all over the place and forming the terrestrial planets, Treiman says. But exactly what happened to the parent object of GRA 06128 and GRA 06129 is not known. If it was destroyed in a collision, there may be fragments of it still out there floating around the solar system as asteroids. Treiman says such fragments might be identified by their light spectra. Some aspects of the meteorite, such as the high abundance of sodium in some of its minerals, hint that the parent body may have contained a lot of water, according to another study of the meteorite by Tomoko Arai of the National Institute for Polar Research in Tokyo, Japan. The research from the five teams was presented on Wednesday at the Lunar
[meteorite-list] Mars Odyssey THEMIS Images: March 10-14, 2008
MARS ODYSSEY THEMIS IMAGES March 10-14, 2008 o Resistance (Released 10 March 2008) http://themis.asu.edu/zoom-20080310a o Herschel Dunes (Released 11 March 2008) http://themis.asu.edu/zoom-20080311a o Small Scale Features (Released 12 March 2008) http://themis.asu.edu/zoom-20080312a o Kasei Channels (Released 13 March 2008) http://themis.asu.edu/zoom-20080313a o Dark Slope Streaks (Released 14 March 2008) http://themis.asu.edu/zoom-20080314a All of the THEMIS images are archived here: http://themis.asu.edu/latest.html NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in co.oration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Brown University Scientist Answers How Peruvian Meteorite Made It to Earth
Office of Media Relations Brown University Contact: Richard Lewis (401) 863-3766 March 11, 2008 Brown Scientist Answers How Peruvian Meteorite Made It to Earth Brown University professor Peter Schultz's study of the Peruvian meteorite has yielded some interesting conclusions that could upend the conventional wisdom about the size and type of meteorites that can strike Earth. PROVIDENCE, R.I. -- It made news around the world: On Sept. 15, 2007, an object hurtled through the sky and crashed into the Peruvian countryside. Scientists dispatched to the site near the village of Carancas found a gaping hole in the ground. Peter Schultz, professor of geological sciences at Brown University and an expert in extraterrestrial impacts, went to Peru to learn more. For the first time, he will present findings from his travels at the 39th annual Lunar and Planetary Science Conference in League City, Texas, in a talk scheduled for 2 p.m. on March 11, 2008. Brown graduate student Robert Scott Harris collaborated on the research, joined by Jose Ishitsuka, a Peruvian astrophysicist, and Gonzalo Tancredi, an astronomer from Uruguay. What Schultz and his team found is surprising. The object that slammed into a dry riverbed in Peru was a meteorite, and it left a 49-foot-wide crater. Soil ejected from the point of impact was found nearly four football fields away. When Schultz's team analyzed the soil where the fireball hit, he found planar deformation features, or fractured lines in sand grains found in the ground. Along with evidence of debris strewn over a wide area, the shattered sand grains told Schultz that the meteorite had maintained a high rate of speed as it shot through the atmosphere. Scientists think it was traveling at roughly 15,000 miles per hour at the moment of impact. Normally with a small object like this, the atmosphere slows it down, and it becomes the equivalent of a bowling ball dropping into the ground, Schultz said. It would make a hole in the ground, like a pit, but not a crater. But this meteorite kept on going at a speed about 40 to 50 times faster than it should have been going. Scientists have determined the Carancas fireball was a stony meteorite -- a fragile type long thought to be ripped into pieces as it enters the Earth's atmosphere and then leaves little more than a whisper of its journey. Yet the stony meteorite that struck Peru survived its passage mostly intact before impact. This just isn't what we expected, Schultz said. It was to the point that many thought this was fake. It was completely inconsistent with our understanding how stony meteorites act. Schultz said that typically fragments from meteorites shoot off in all directions as the object speeds to Earth. But he believes that fragments from the Carancas meteorite may have stayed within the fast-moving fireball until impact. How that happened, Schultz thinks, is due to the meteorite's high speed. At that velocity, the fragments could not escape past the shock-wave barrier accompanying the meteorite and instead reconstituted themselves into another shape, he said. That new shape may have made the meteorite more aerodynamic -- imagine a football passing through air versus a cinderblock -- meaning it encountered less friction as it sped toward Earth, hitting the surface as one large chunk. It became very streamlined and so it penetrated the Earth's atmosphere more efficiently, Schultz said. Schultz's theory could upend the conventional wisdom that all small, stony meteorites disintegrate before striking Earth. If correct, it could change the thinking about the size and type of extraterrestrial objects that have bombarded the Earth for eons and could strike our planet next. You just wonder how many other lakes and ponds were created by a stony meteorite, but we just don't know about them because when these things hit the surface they just completely pulverize and then they weather, said Schultz, director of the Northeast Planetary Data Center and the NASA/Rhode Island University Space Grant Consortium. Schultz's research could have implications for Mars, where craters have been discovered in recent missions. They could have come from anything, he said. It would be interesting to study these small craters and see what produced them. Perhaps they also will defy our understanding. IMAGE CAPTION: [http://www.brown.edu/news/2007-08/07-113.jpg (40KB)] The Carancas Fireball Planetary geologists had thought that stony meteorites would be destroyed when they passed through Earth's atmosphere. This one struck ground near Carancas, Peru, at about 15,000 miles per hour. Brown University geologists have advanced a new theory that would upend current thinking about stony meteorites. Image: Peter Schultz, Brown University __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Cassini Flies Through Watery Plumes of Saturn Moon Enceladus
You gotta love Enceladus. Bright white with at least five different types of terrain on it but mostly looks to be one huge ice ball. How in seven suns did it establish itself as a satellite of Saturn? I'm anxious to hear more about the analysis of the geysers. Thanks Mr. Baalke for the updates. Most interesting. Mike Murray micro hunter of southwest Colorado On Mar 14, 2008, at 4:43 PM, Ron Baalke wrote: http://www.jpl.nasa.gov/news/news.cfm?release=2008-044 Cassini Flies Through Watery Plumes of Saturn Moon Jet Propulsion Laboratory March 13, 2008 NASA's Cassini spacecraft performed a daring flyby of Saturn's moon Enceladus on Wed., March 12, flying about 15 kilometers per second (32,000 mph) through icy water geyser-like jets. The spacecraft snatched up precious samples that might point to a water ocean or organics inside the little moon. Scientists believe the geysers could provide evidence that liquid water is trapped under the icy crust of Enceladus. The geysers emanate from fractures running along the moon's south pole, spewing out water vapor at approximately 400 meters per second (800 mph). The new data provide a much more detailed look at the fractures that modify the surface and will give a significantly improved comparison between the geologic history of the moon's north pole and south pole. New images show that compared to much of the southern hemisphere on Enceladus--the south polar region in particular--the north polar region is much older and pitted with craters of various sizes. These craters are captured at different stages of disruption and alteration by tectonic activity, and probably from past heating from below. Many of the craters seem sliced by small parallel cracks that appear to be ubiquitous throughout the old cratered terrains on Enceladus. These new images are showing us in great detail how the moon's north pole differs from the south, an important comparison for working out the moon's obviously complex geological history, said Carolyn Porco, Cassini imaging team leader, Space Science Institute, Boulder, Colo. And the success of yesterday's daring and very low-altitude flyby means this coming summer's very close encounter, when we get exquisitely detailed images of the surface sources of Enceladus' south polar jets, should be an exciting 'next big step' in understanding just how the jets are powered. This week's flyby and another one planned for Oct. 9, 2008, were designed so that Cassini's particle analyzers could dissect the body of the plume for information on the density, size, composition and speed of the particles. Among other things, scientists will use the data gathered this week to figure out whether the gases from the plume match the gases that make up the halo of particles around Enceladus. This may help determine how the plumes formed. During Cassini's closest approach, two instruments were collecting data--the Cosmic Dust Analyzer and the Ion and Neutral Mass Spectrometer. An unexplained software hiccup with Cassini's Cosmic Dust Analyzer instrument prevented it from collecting any data during closest approach, although the instrument did get data before and after the approach. During the flyby, the instrument was switching between two versions of software programs. The new version was designed to increase the ability to count particle hits by several hundred hits per second. The other four fields and particles instruments on the spacecraft, in addition to the ion and neutral mass spectrometer, did capture all of their data, which will complement the overall composition studies and elucidate the unique plume environment of Enceladus. Cassini's instruments discovered evidence for the geyser-like jets on Enceladus in 2005, finding that the continuous eruptions of ice water create a gigantic halo of ice dust and gas around Enceladus, which helps supply material to Saturn's E-ring. This was the first of four Cassini flybys of Enceladus this year. During Wednesday's flyby, the spacecraft came within 50 kilometers (30 miles) of the surface at closest approach, 200 kilometers (120 miles) while flying through the plume. Future trips may bring Cassini even closer to the surface of Enceladus. Cassini will complete its prime mission, a four-year tour of Saturn, in June. From then on, a proposed extended mission would include seven more Enceladus flybys. The next Enceladus flyby would take place in August of this year. For more images and more information, visit: http://www.nasa.gov/ cassini and http://saturn.jpl.nasa.gov . The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate, Washington. The Cassini orbiter was designed, developed and assembled at JPL.
Re: [meteorite-list] Cassini Flies Through Watery Plumes of SaturnMoon Enceladus
I concur Mike, and thanks as always Ron for sharing. Jerry Flaherty - Original Message - From: Michael Murray [EMAIL PROTECTED] To: Ron Baalke [EMAIL PROTECTED] Cc: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Friday, March 14, 2008 8:50 PM Subject: Re: [meteorite-list] Cassini Flies Through Watery Plumes of SaturnMoon Enceladus You gotta love Enceladus. Bright white with at least five different types of terrain on it but mostly looks to be one huge ice ball. How in seven suns did it establish itself as a satellite of Saturn? I'm anxious to hear more about the analysis of the geysers. Thanks Mr. Baalke for the updates. Most interesting. Mike Murray micro hunter of southwest Colorado On Mar 14, 2008, at 4:43 PM, Ron Baalke wrote: http://www.jpl.nasa.gov/news/news.cfm?release=2008-044 Cassini Flies Through Watery Plumes of Saturn Moon Jet Propulsion Laboratory March 13, 2008 NASA's Cassini spacecraft performed a daring flyby of Saturn's moon Enceladus on Wed., March 12, flying about 15 kilometers per second (32,000 mph) through icy water geyser-like jets. The spacecraft snatched up precious samples that might point to a water ocean or organics inside the little moon. Scientists believe the geysers could provide evidence that liquid water is trapped under the icy crust of Enceladus. The geysers emanate from fractures running along the moon's south pole, spewing out water vapor at approximately 400 meters per second (800 mph). The new data provide a much more detailed look at the fractures that modify the surface and will give a significantly improved comparison between the geologic history of the moon's north pole and south pole. New images show that compared to much of the southern hemisphere on Enceladus--the south polar region in particular--the north polar region is much older and pitted with craters of various sizes. These craters are captured at different stages of disruption and alteration by tectonic activity, and probably from past heating from below. Many of the craters seem sliced by small parallel cracks that appear to be ubiquitous throughout the old cratered terrains on Enceladus. These new images are showing us in great detail how the moon's north pole differs from the south, an important comparison for working out the moon's obviously complex geological history, said Carolyn Porco, Cassini imaging team leader, Space Science Institute, Boulder, Colo. And the success of yesterday's daring and very low-altitude flyby means this coming summer's very close encounter, when we get exquisitely detailed images of the surface sources of Enceladus' south polar jets, should be an exciting 'next big step' in understanding just how the jets are powered. This week's flyby and another one planned for Oct. 9, 2008, were designed so that Cassini's particle analyzers could dissect the body of the plume for information on the density, size, composition and speed of the particles. Among other things, scientists will use the data gathered this week to figure out whether the gases from the plume match the gases that make up the halo of particles around Enceladus. This may help determine how the plumes formed. During Cassini's closest approach, two instruments were collecting data--the Cosmic Dust Analyzer and the Ion and Neutral Mass Spectrometer. An unexplained software hiccup with Cassini's Cosmic Dust Analyzer instrument prevented it from collecting any data during closest approach, although the instrument did get data before and after the approach. During the flyby, the instrument was switching between two versions of software programs. The new version was designed to increase the ability to count particle hits by several hundred hits per second. The other four fields and particles instruments on the spacecraft, in addition to the ion and neutral mass spectrometer, did capture all of their data, which will complement the overall composition studies and elucidate the unique plume environment of Enceladus. Cassini's instruments discovered evidence for the geyser-like jets on Enceladus in 2005, finding that the continuous eruptions of ice water create a gigantic halo of ice dust and gas around Enceladus, which helps supply material to Saturn's E-ring. This was the first of four Cassini flybys of Enceladus this year. During Wednesday's flyby, the spacecraft came within 50 kilometers (30 miles) of the surface at closest approach, 200 kilometers (120 miles) while flying through the plume. Future trips may bring Cassini even closer to the surface of Enceladus. Cassini will complete its prime mission, a four-year tour of Saturn, in June. From then on, a proposed extended mission would include seven more Enceladus flybys. The next Enceladus flyby would take place in August of this year. For more images and more information, visit: http://www.nasa.gov/ cassini and http://saturn.jpl.nasa.gov . The Cassini-Huygens mission is a cooperative
Re: [meteorite-list] Mars Odyssey THEMIS Images: March 10-14, 2008
Ron and List for the first time I'm unable to bring up Themis Images from your links? Jerry Flaherty - Original Message - From: Ron Baalke [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Friday, March 14, 2008 6:49 PM Subject: [meteorite-list] Mars Odyssey THEMIS Images: March 10-14, 2008 MARS ODYSSEY THEMIS IMAGES March 10-14, 2008 o Resistance (Released 10 March 2008) http://themis.asu.edu/zoom-20080310a o Herschel Dunes (Released 11 March 2008) http://themis.asu.edu/zoom-20080311a o Small Scale Features (Released 12 March 2008) http://themis.asu.edu/zoom-20080312a o Kasei Channels (Released 13 March 2008) http://themis.asu.edu/zoom-20080313a o Dark Slope Streaks (Released 14 March 2008) http://themis.asu.edu/zoom-20080314a All of the THEMIS images are archived here: http://themis.asu.edu/latest.html NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in co.oration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD - Complete set of the 4 Antarctic Meteorite Red Books
Hello fellow listees, I am putting up for sale an extremely rare set of the 4 Antarctic Meteorite Red Books. 1) Catalog Of Yamato Meteorites, 1979 2) Photographic Catalog Of The Selected Antarctic meteorites, 1981 3) Photographic Catalog Of The Antarctic Meteorites, 1987 4) Catalog Of The Antarctic Meteorites, 1995 All four books are in very good condition although there is a slight page separation in the 1981 book. Asking for offers over $1100.00 for the set. Shipping at cost. Also, I have a few Antarctic Meteorite Blue Books (Symposium Books) for sale if anyone is interested. Please email me for photos and any additional information. Thank you. Jake Pelletier, IMCA # 6168 __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
