Re: [meteorite-list] A "guy with meteorites article"
For sure the 2 pieces he have in the hand show in the photo is 100% not meteorites..I hope he not have see this is meteorites or is good he not help people with meteorites. Matteo --- Darren Garrison <[EMAIL PROTECTED]> ha scritto: > I don't know about other browsers, but in Windows > Explorer, the pictures cover half of the text of > the article. One of the photos shows two "possible > meteorites". One is an Odessa iron. The other, > though, is a "stony iron" meteorite found "in his > yard". That one may or may not be the one that he > thinks is worth $200. > > > > http://www.jacksonsun.com/apps/pbcs.dll/article?AID=/20051029/NEWS01/510290309/1002 > > > > When night falls and most folks are thinking about > retiring to the warmth of their beds, Beech Bluff > resident Malcolm Wilcox is sitting on his deck > staring at what he calls a "busy sky." > > "The other night I saw a fireball," he said. "It was > the biggest I've seen in my life." > > A retiree, Wilcox has taken up a new hobby - sky > watching. > > In addition to his love for Civil War history, > Wilcox is an amateur astronomer and has started > going > to different sites in West Tennessee to investigate > meteorites. > > A meteorite is defined as a mass of rock or metal > that has survived the friction of Earth's > atmosphere to reach the surface, according to the > School Discovery Web site. > > Wilcox, 65, treasures a meteorite that he collected > when he was 16 in Odessa, Texas, in 1956. > > To some, Wilcox's meteorite may look like just any > old rock. > > But the weight of the jet-black object might just > turn a skeptic into a believer. > > "Back then, I didn't think anything of it (his > meteorite), and I traded a lot of them," Wilcox > said. > "And now this is my only one like it." > > Sky watchers who are seeking to confirm a meteorite > may think they could turn to NASA (National > Aeronautics and Space Administration) for > confirmation - think again. > > The Jet Propulsion Laboratory, which is a division > of NASA, does not travel to confirm meteorite > strikes. > > "If we did that, we would never get any other work > done," said D.C. Agle, a JPL spokesman in > Pasadena, Calif. > > "But if someone finds something they have confidence > in, they should contact a local science museum > or university," he said. > > Wilcox uses his telescope at night from his deck to > watch the activity in the sky. He also keeps a > Bounty Hunter brand metal detector and magnet on > wheels handy for when he's out in the field. > > "There's money in meteorites," said Wilcox as he > held up a Stony Iron meteorite, which he believes > would be valued at $200. > > He's been researching meteorites for the past six > months and keeps two meteorite books on hand that > he calls his "bibles." > > Wilcox believes he's good enough to spot a > fraudulent meteorite claim by checking for a few key > factors. > > "Iron and nickel contents are a good sign that it's > a meteorite," he said. "And if a person sees a > meteor falling, then there should be a scent of > sulfur." > > Let the sky watching begin. > > Visit talkback.jacksonsun.com to share your > thoughts. > > - Tajuana Cheshier, 425-9643 > > > Originally published October 29, 2005 > > __ > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > M come Meteorite - Matteo Chinellato Via Triestina 126/A - 30030 - TESSERA, VENEZIA, ITALY Email: [EMAIL PROTECTED] Sale Site: http://www.mcomemeteorite.it Collection Site: http://www.mcomemeteorite.info MSN Messanger: spacerocks at hotmail.com EBAY.COM:http://members.ebay.com/aboutme/mcomemeteorite/ ___ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] A "guy with meteorites article"
I don't know about other browsers, but in Windows Explorer, the pictures cover half of the text of the article. One of the photos shows two "possible meteorites". One is an Odessa iron. The other, though, is a "stony iron" meteorite found "in his yard". That one may or may not be the one that he thinks is worth $200. http://www.jacksonsun.com/apps/pbcs.dll/article?AID=/20051029/NEWS01/510290309/1002 When night falls and most folks are thinking about retiring to the warmth of their beds, Beech Bluff resident Malcolm Wilcox is sitting on his deck staring at what he calls a "busy sky." "The other night I saw a fireball," he said. "It was the biggest I've seen in my life." A retiree, Wilcox has taken up a new hobby - sky watching. In addition to his love for Civil War history, Wilcox is an amateur astronomer and has started going to different sites in West Tennessee to investigate meteorites. A meteorite is defined as a mass of rock or metal that has survived the friction of Earth's atmosphere to reach the surface, according to the School Discovery Web site. Wilcox, 65, treasures a meteorite that he collected when he was 16 in Odessa, Texas, in 1956. To some, Wilcox's meteorite may look like just any old rock. But the weight of the jet-black object might just turn a skeptic into a believer. "Back then, I didn't think anything of it (his meteorite), and I traded a lot of them," Wilcox said. "And now this is my only one like it." Sky watchers who are seeking to confirm a meteorite may think they could turn to NASA (National Aeronautics and Space Administration) for confirmation - think again. The Jet Propulsion Laboratory, which is a division of NASA, does not travel to confirm meteorite strikes. "If we did that, we would never get any other work done," said D.C. Agle, a JPL spokesman in Pasadena, Calif. "But if someone finds something they have confidence in, they should contact a local science museum or university," he said. Wilcox uses his telescope at night from his deck to watch the activity in the sky. He also keeps a Bounty Hunter brand metal detector and magnet on wheels handy for when he's out in the field. "There's money in meteorites," said Wilcox as he held up a Stony Iron meteorite, which he believes would be valued at $200. He's been researching meteorites for the past six months and keeps two meteorite books on hand that he calls his "bibles." Wilcox believes he's good enough to spot a fraudulent meteorite claim by checking for a few key factors. "Iron and nickel contents are a good sign that it's a meteorite," he said. "And if a person sees a meteor falling, then there should be a scent of sulfur." Let the sky watching begin. Visit talkback.jacksonsun.com to share your thoughts. - Tajuana Cheshier, 425-9643 Originally published October 29, 2005 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re: Crackpot Theory Redux
Hi, Axel, The dynamics of the situation are such that increasing the speed of an incoming object in an attempt to penetrate the atmosphere without losing all its mass to frictional ablation just never happens for small objects. Now, a big object, like a 1000 meter asteroid will ALWAYS penetrate the atmosphere and reach the surface of the Earth; and a small object, like a 1 mm grain, will NEVER reach the Earth's surface at speed (it might float down; see below). In both cases, this is regardless of initial speed. The division between objects that can reach the surface and those that can't is this: if the mass of atmosphere in the path of the object is greater than the object's mass, it won't make it; and if it's less, it will. Speed doesn't enter the equation (much). Imagine a 1 mm grain; then imagine a 1 mm "tube" of atmosphere extending from the top of the atmosphere to the surface. If that "tube" contains more mass of atmosphere than the mass of the grain, the grain won't be able to reach the surface. Such small grains, at "normal" entry velocities, will be stopped without frictional heating and just float down to the surface. This is how most interplanetary and interstellar dust arrives at the surface and becomes incor- porated in sediments, many 1000's of tons per year. At high entry velocities, small grains burn up completely. Firestone's belief that because iron grains are formed in the heart of a supernova, they could survive re-entry is completely mistaken. The individual iron atoms are created in the supernova and accelerated to immense velocities in nano- seconds. That does not matter; you can't destroy an individual atom. They assemble as grains when the atoms are crowded together under high pressures and temperatures in their first few milliseconds. But assemblages of trillions of atoms, like tiny grains, can be dis-assembled. When that happens, the individual atoms are not destroyed (they float down), but they're not particles any more... The heating depends on the ratio of particle surface to particle mass, which is high for small particles and low for large particles. So, for a very large object (100's of meters), it just can't be vaporized fast enough to be stopped in the 1.5 to 2.0 seconds of atmospheric passage! The kind of objects that produce meteorites (10's of meters) lose 90% or more of their mass before fragmenting and depositing the pieces as meteorites. An obvious demonstration of the fact that speed alone will not get you through the atmosphere is the example of very energetic "cosmic rays," like an iron nucleus travelling at 99.9% of the speed of light: very small particle, very high speed, but such cosmic rays are nicely stopped by the atoms of the Earth's atmosphere. (To be completely accurate here, 1 such particle in 10^24th particles will pass right through the atmosphere and the Earth itself and be detected as a vertically rising "cosmic ray" on the other side of the Earth! But, that's because of its small nuclear dimension, and as you can see, it's rare...) Sterling K. Webb Axel Emmermann wrote: > Hello list, > > I usually lurk from behind the Atlantic but his thing has captured my > imagination. > > Most of you are likely to have more background in astronomy and physics than > I have, so I'll put it to you as a question: > > What would happen if little drops of iron smash into the atmosphere at such > a velocity that the time they need to reach the surface is smaller than the > time to heat them up through and through? > > Heat has to travel to the inside of such a pellet in order to evaporate it, > doesn't it? > Conducting heat to the core of a meteorite must be function of its > composition, so iron will be hot fast but iron mixed with dust will take a > lot longer. But still, evaporating a meteorite would still be a process > which needs a finite amount of time, right? > Now, if the meteorite's journey through the atmosphere is shorter than the > time needed to heat it to evaporation from say -150° it would hit the > earth's surface, or not? > > Another thing perhaps: isn't it possible that at VERY high speeds an > impacting object just compresses the air in front of it and is actually > protected by this cushion of supercompressed gases? > > Axel > > -Oorspronkelijk bericht- > Van: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Sterling K. > Webb > Verzonden: zaterdag 29 oktober 2005 8:20 > Aan: Darren Garrison; Meteorite List; Marco Langbroek; MarkF; Paul H > Onderwerp: [meteorite-list] Re: Crackpot Theory Redux > > Hi, Darren, Marco, Mark, List > > Being really bored recently, I emailed > Richard B. Firestone at Berkeley, Lawrence's > Radiation Lab, #1 Cyclotron Road (yeah, that's > his real address!) the following email. > > > To: Richard B. Firestone > > Re: Disputed Cometary Hypothesis > > > > Reading this press release: >
[meteorite-list] MUNICH SHOW PHOTOS
Its madness here at the show and I dont have time for captions but here are some annual friday night meteorite party photos along with a photo of my booth as the last photo. Cheers DEAN http://www.meteoriteshop.com/munichshow2.jpg http://www.meteoriteshop.com/munichshow3.jpg http://www.meteoriteshop.com/munichshow4.jpg http://www.meteoriteshop.com/munichshow5.jpg http://www.meteoriteshop.com/munichshow6.jpg http://www.meteoriteshop.com/munichshow8.jpg http://www.meteoriteshop.com/munichshow7.jpg __ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
