[meteorite-list] Ebay Auctions ended at few
Hello all My 3 auctions n ebay ending at 12 hours, take a look to the lot of NWA 1260 with nice matrix and similar to NWA 869, is all end pieces, all polished all ready to re-saleand is over 200 gr. If interested go here http:[EMAIL PROTECTED]/ Regards Matteo = M come Meteorite - Matteo Chinellato Via Triestina 126/A - 30030 - TESSERA, VENEZIA, ITALY Email: [EMAIL PROTECTED] Sale Site: http://www.mcomemeteorite.com Collection Site: http://www.mcomemeteorite.info International Meteorite Collectors Association #2140 MSN Messanger: [EMAIL PROTECTED] EBAY.COM:http:[EMAIL PROTECTED]/ __ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Micro meteorites on ebay
Hello all and Happy Holidays: Ending Wednesday evening I have several uncommon micros up for auction on ebay - Bjurbole, Dashouguz, Knyahinya, and Independence. You can check the listings under [EMAIL PROTECTED] Thanks, John __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AIAA's 1st Planetary Defense Conference: Protecting Earth from Asteroids
http://www.aiaa.org/calendar/index.hfm?cal=5&id=865 AIAA's 1st Planetary Defense Conference: Protecting Earth from Asteroids February 2004 - Exact date TBD Los Angeles, California Synopsis AIAA's 1st Planetary Defense Conference: Protecting Earth from Asteroids will address technical issues associated with, and relative to, the defense of Earth from approaching near-Earth objects (comets and asteroids). This forum shall approach the threat from the perspective of three levels of warnings: 1) short term (less than 10 years warning of possible impact); 2) medium term (10 to 30 years warning); and 3) long term (>30 years warning), with an overarching intent to define several possible threat scenarios and develop potential responses for each. Focused conference topics will: * Examine current and future detection capabilities and options; * Consider current and future techniques, hardware, and systems available to mitigate threats; * Discuss national and international policy implications of mounting a planetary defense effort; * Develop recommendations for future work, strategies, and policies; * Develop recommendations for demonstrations/experiments/near-term activities; and * Discuss public safety and disaster preparedness implications of possible asteroid or comet impacts. General Chair William Ailor The Aerospace Corporation E-mail: [EMAIL PROTECTED] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Microbes From Edge Of Space Revived
http://www.newscientist.com/news/news.jsp?id=ns3186 Microbes from edge of space revived Jenny Hogan New Scientist December 17, 2002 Microbes collected from the edge of space have been brought back to life in the lab. This enabled the high-flying organisms to be identified, almost two years after they were found in air samples collected by a weather balloon cruising at 41,000 metres (135,000 feet) over southern India. The two species of bacteria (B. simplex, S. pasteuri) and one fungus (E. albus) are similar to common ground-dwelling microbes which lurk in soil and vegetation, says Milton Wainwright of the University of Sheffield, UK, who worked out how to culture the cells. How the bugs got there is not known, but there are three possibilities: they were carried up on winds, they sneaked into the samples on Earth or they have flown through space and are aliens making their way down to our planet. The latter possibility fits with a theory developed by Chandra Wickramasinghe and the late Fred Hoyle in the 1970s, which proposes that life originated elsewhere in the Universe and hitched a lift to Earth on a passing comet. Wickramasinghe, at the Cardiff University Centre for Astrobiology in Wales, is Wainwright's co-author on the new paper, along with the Indian scientists that sent up the balloon. If the microbes were indeed drifting in from space, Wickramasinghe calculates that up to a tonne could be landing each year, based on the density of microbes found in the air samples. Up draught Wainwright admits that the simplest explanation is that the organisms, found above 99 per cent of the Earth's atmosphere, have terrestrial origins. But, he asks, how did they get up there? Turbulent winds at ground level are certainly capable of sweeping particles up into the atmosphere. But this kind of weather is confined beneath the tropopause, which acts like a lid at about 17,000 metres. Volcanic eruptions can push matter through the tropopause. But there were no such events in the months before the samples were taken, and gravity would be expected to drag any microbes back down in a few days. However, the man-made greenhouse gases called CFCs have been found at similar altitudes, showing that global air currents can pierce the tropopause. Martin Juckes, an atmospheric scientist at the Rutherford Appleton Laboratory, UK, says that air flows upwards at the tropics at about one metre per hour, and may carry material with it. But whether particles as large as microbes could be carried to such heights is not known. Freeze-dried The third possibility, that the microbes represent experimental contamination, is dismissed by Wainwright. The experimental protocol was carefully designed to exclude contamination before the samples were collected during the balloon flight (New Scientist print edition, 4 August 2001). And contamination after the samples had been returned to Earth is unlikely, he argues, because the microbes were freeze-dried. This was due to the cold, dry conditions at 41,000 metres, he says. To coax them into growing, Wainwright had to soak them in a nutrient solution. They refused to multiply when spread on the jellies usually used to culture samples - but any contaminant cells would have shown up at this stage, he says. Journal Reference: FEMS Microbiology Letters) (Article 10778) __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Sikhote-Alin
Tom aka james Knudson inquired: > I was wondering if any one knows or has a good idea of how long > it took for Sikhote-alin fireball to create all those beautiful oriented > individuals? Hello Tom and List, Probably something between 4 and 15 seconds. The Treysa iron was first observed at a height of 83 km, it reached its end point (zone of retardation, Hemmungspunkt) at a height of 16 km and the length of the trajectory was about 81 km. Its initial velocity was > 20 km/s (Sikhote-Alin: 14.5 km/s) and the angle between the trajectory and the horizontal 55° (Sikhote-Alin: 41°). I have no information about the length of the trajectory of the S-A iron nor about the height when it was first observed but due to its enormous (pre-atmospheric) mass it penetrated deeper into the atmosphere and probably reached its end point at an altitude of about 5 km. Anyway I guess that it took no longer than about 10 seconds "to create all those beautiful oriented individuals". Best regards, Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Cells' Magnet Bared - Natural Compass Exposes Life On Earth And Beyond
http://www.nature.com/nsu/021216/021216-4.html Cells' magnets bared Natural compass exposes life on Earth and beyond. HELEN PEARSON Nature Science Update 17 December 2002 Geologists may more accurately assess the state of ancient Earth - thanks to fossilized bacteria. Some bugs carry tiny magnetic compasses to help them swim at a comfortable depth in water. These have been preserved in rocks up to 2 billion years old. They give clues to prehistoric Earth's life, magnetic field and climate. But the magnets in living bacteria have been largely ignored, says Arash Komeili of the California Institute of Technology in Pasadena. He and his team are probing the obscure, membrane-bound sacs called magnetosomes that enclose the tiny crystals. "We had no idea what states they go through in a bacterium's normal life cycle," Komeili says. The team has preliminary evidence that the structures can form and dissolve, he revealed at the American Society for Cell Biology meeting in San Francisco. Ultimately, this could help geologists decipher whether ambiguous fragments of magnetite are signs of early life. Since 1996, for example, scientists have hotly debated the meaning of bands rich in magnetite on a martian meteorite, ALH84001. "Every conceivable non-biological technique has since been suggested for forming them," says geobiologist Joe Kirschvink, also at the California Institute of Technology. "By far the simplest interpretation is that there must have been life on Mars four billion years ago." Magnetic deviant In biological circles, magnetosomes are considered extraordinary. Textbooks hold that primitive cells, such as bacteria, do not have compartments called organelles dividing them up. "People just don't talk about organelles in bacteria," says Komeili. Some fish also bear cells containing magnetosomes, and scientists speculate that so, too, might homing animals such as bees, termites and pigeons. Komeili hopes to work out whether this level of cell organization actually evolved in some bacterial cells first. He has already identified one of the proteins involved in making magnetosomes. This is related to a protein called actin used in the architecture of mammalian cells. "The work could give us some important clues about the evolution of all higher life-forms on Earth," says Kirschvink. There are many peculiar biological features of the magnetic bacteria that remind us "rather strongly" of primitive cells with nuclei, he comments. __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Hydrocarbon Bubbles Discovered In Tagish Lake Meteorite
http://www.newscientist.com/news/news.jsp?id=ns3189 Hydrocarbon bubbles discovered in meteorite Will Knight New Scientist December 17, 2002 Hollow hydrocarbon bubbles a few microns in diameter have been discovered in a meteorite that crashed into a frozen lake in Canada in 2000. The simple organic structures could have provided a sheltered environment for the development of the first primitive organisms, suggests Michael Zolensky, at NASA's Johnson Space Center. He used an electron microscope to discover the globules, which are a few microns in diameter. "These are ready-made homes," he told New Scientist. "It shows that structures that could protect early life were present on asteroids billions of years ago." It is the first time that such bubbles have been found on a meteorite, but laboratory experiments designed to simulate conditions in space have produced similar structures. "Some ideas for the evolution of life require a kind of membrane to hold together all the chemicals that you want a cell to use," says Iain Gilmour, of the UK's Open University. "If you have some sort of globular structure, you've got the start of a potential cell structure." Other researchers have suggested that tiny cavities in minerals could have provided the containers from which the first cellular life emerged. Quick freeze The meteorite, a carbonaceous chondrite, was recovered from the frozen waters of Tagish Lake in the Yukon Territory in January 2000, just a week after it landed. The extreme cold of the lake and the speed at which it was recovered prevented the contamination that spoils many meteorites found on Earth. The circumstances under which the cavities could aid the development of life remain unclear. But Zolensky notes meteorites of this general type have been crashing into Earth throughout its history. They would have provided the early planet with these hydrocarbon globules at the same time as water, carbon and organic molecules were being bought to Earth on comets and meteorites, he says, and at the same time the first terrestrial life was developing. Much previous research into potential extraterrestrial triggers for life on Earth has focused on meteorites that landed in Murchison, Southern Australia in 1969. These contained amino acids, the building blocks of proteins and life, and showed for the first time that the molecules could exist elsewhere in the Solar System. Gilmour says: "It means you've got the stuff you need to make proteins in one extra-terrestrial sample and the stuff needed to hold them together in another." Zolensky's research is published in the International Journal of Astrobiology. __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Student Science Instrument Selected For Ride To Pluto
http://pluto.jhuapl.edu/121702.htm STUDENT SCIENCE INSTRUMENT SELECTED FOR RIDE TO PLUTO New Horizons Adds Student-Designed Dust Counter December 17, 2002 It's a 20-year homework assignment, but you won't hear any complaints from the students handed the task. A special instrument, called the Student Dust Counter, has been added to NASA's New Horizons mission to Pluto and the Kuiper Belt. Designed by students at the University of Colorado at Boulder, the device will detect dust grains produced by collisions between asteroids, comets and Kuiper Belt objects during New Horizons' journey. It would be the first science instrument on a NASA planetary mission to be designed, built and "flown" by students. With faculty supervision, University of Colorado students will also distribute and archive data from the instrument, and lead a comprehensive education and outreach effort to bring their results and experiences to classrooms of all grades over the next two decades. Students in schools and universities nationwide will be able to share in both the development of the instrument and analysis of its data. "The Student Dust Counter is an incredibly exciting addition to our mission," says New Horizons Principal Investigator Dr. Alan Stern, director of the Southwest Research Institute's Space Studies Department in Boulder. "Not only will it give us the most detailed accounting yet of dust particle concentrations in the outer solar system, it will offer generations of students a real, hands-on role in a pioneering NASA space mission. I am thrilled that NASA's Office of Space Science approved this addition to New Horizons and I hope it opens the door to student-led experiments on more missions." Now in preliminary design, New Horizons is planning for launch in 2006 or 2007, a swing past Jupiter, and an encounter with Pluto and its moon, Charon, as early as July 2015. In the following years it will explore from one to three icy, rocky mini-worlds in the Kuiper Belt, billions of miles beyond Neptune's orbit. The nuclear-powered probe's payload includes cameras and sensors for imaging the surfaces of Pluto, Charon and Kuiper Belt objects, mapping their compositions and temperatures, and studying Pluto's complex atmosphere in detail. Though the dust counter is part of the mission's education and public outreach program - rather than the main science payload - it will in fact contribute significant science. Because no dust detector has ever flown beyond 18 astronomical units from the Sun (nearly 1.7 billion miles, about the distance of Uranus), the Student Dust Counter's data may be as valuable to researchers as the project's outreach focus is to students. "Those measurements will give us a better handle on the sources and transport of dust in the solar system," says New Horizons Project Scientist Dr. Andrew Cheng, of The Johns Hopkins University Applied Physics Laboratory in Laurel, Md. First proposed to the New Horizons team last spring, the Student Dust Counter underwent a successful design review in October. NASA approved the project in November and the instrument is set for another, more detailed review next spring. Like New Horizons' other six instruments, the Student Dust Counter must be completed by summer 2004 for installation on the spacecraft and rigorous testing. "We have our work cut out for us," says Gene Holland, an aerospace engineering graduate student at the University of Colorado and the instrument's student project manager. "But at the same time, that's what makes the project so exciting. We have a lot of responsibility on a major space mission. The students feel like what they're doing will make a real difference." Now that NASA has approved the dust counter's addition to the spacecraft, Holland says the team designing and building the device will expand from four to nearly 20 graduate and undergraduate members. It will include engineering and science students - of course - and others studying for careers in business, education and communications. "We want to involve students in every aspect of this project," Stern says. "This is a multi-generational student experiment. The current team will build it, but future generations will operate it, analyze the data and publish results." And they're ready to get started. "The students are jumping up and down about this - they can't wait to get involved," says Dr. Fran Bagenal, a professor in the University of Colorado Department of Astrophysical, Planetary & Atmospheric Sciences and the science leader on the New Horizons education-public outreach team. "They are going to build it, they are going to examine the data, and they are going to tell other students how this works and why this is so cool. They have a unique opportunity to both educate and inspire the students who will follow them, because there are kids in kindergarten today who could be working on this when New Horizons re
[meteorite-list] Putorana and an ALH84001 stamp
Hi, All -- The paper Matt Morgan and I wrote about the Putorana not-a-mesosiderite is finally out! You can get a copy off of Matt's web site (http://www.mhmeteorites.com/pubs/putorana_mps.pdf or soon from towards the bottom of mine (http://www.lpi.usra.edu/science/treiman/). AND Just noticed a Guyana stamp about ALH84001 on ebay http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=747166214. This might be a great deal, as one web site lists the stamp for $1,100!!! (http://www.wewebu.com/guyana__50_stamp.html). However, there is some doubt that this is a legitimately issued stamp (http://www.pibburns.com/catastro/metstamp.htm). Happy Holdays Allan Allan H. Treiman Senior Staff Scientist Lunar and Planetary Institute 3600 Bay Area Boulevard Houston, TX 77058-1113 281-486-2117 281-486-2162 (FAX) __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] netscape help?
Hello List , Sorry for the out of context post! I am trying to switch from hotmail to Netscape's email and was wondering if any one knows how to add a signature at the end of your letter? Thanks, Tom The proudest __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] metal detector help?
Hello List, My metal detector does not pic up stone meteorites unless there over 100g's. Yes I like finding meteorites over 100g's but I also like finding the smaller ones! So any ways I barrowed a metal detector from my uncle. It is a WHITES EAGLE 2 SL , But no directions! Does any list member have one. If so could you give my a crash coarse. Like what I do after I turn it on, what setting to use? I plan on using it at Gold Basin! Thanks, Tom The proudest member of the I.M.C.A. #6168 _ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] The authors are Canadian
http://www.uark.edu/~meteor/abst37-12supp.html#schmitt __ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
