Re: [meteorite-list] Topics for collection of wisdoms
Michael Murray wrote: Hi List, I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Michael Murray http://news.bbc.co.uk/2/hi/science/nature/6460089.stm 'Lunar dust 'may harm astronauts' A team at the University of Tennessee (UT) in Knoxville is also looking at ways of using magnets to filter dust from the living environments of lunar bases and spacecraft. Best, ken newton __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Topics for collection of wisdoms
On Fri, 16 Mar 2007 22:17:22 -0600, you wrote: or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? This seems to fit here: http://space.newscientist.com/article/dn11406-magnetic-elephant-trunk-sucks-up-lunar-soil.html?DCMP=Matt_Sparkesnsref=trunk Magnetic 'elephant trunk' sucks up lunar soil 21:57 16 March 2007 NewScientist.com news service David Shiga, Houston Elephants' trunks are remarkable tools. Boasting more muscles than the human body, the appendages can knock down trees and suck in several gallons of water, spraying it into their owners' mouths or over their vast bodies. Now, researchers say elephant trunk-like devices may be useful on the Moon, as well. And they have developed a prototype of a magnetic, trunk-like tube that can collect lunar soil without kicking up hazardous dust. Future astronauts living on the Moon will need lots of water, oxygen and other resources that can be extracted from the lunar soil, or regolith. But collecting the large quantities needed with front-end loaders and dump trucks could throw up a lot of dust. That could cause a host of problems, since the tiny, jagged dust particles could clog machinery and even harm astronauts' health if inhaled (see Martian dust may be hazardous to your health). In a bid to solve the problem, Benjamin Eimer and Lawrence Taylor, both of the University of Tennessee in Knoxville, US, are developing a magnetic device designed to collect soil without creating clouds of the powdery dust. This idea is akin to a leaf sucker, Eimer told New Scientist. Magnetic coils The idea is to build a flexible tube with magnetic coils spaced at regular intervals along its length. Because lunar soil particles contain a lot of iron, the magnetic field produced by the coils would suck the soil into the tube and whisk it along its length. A relatively small tube would be used by an astronaut or robot to pick up soil and feed it into a larger magnetic 'pipeline' leading back to storage facilities or processing plants at the lunar base. Many of these flexible tubes could be attached to the same pipeline like veins in a leaf, allowing soil to be collected from a large area. And because the magnetic field channels the soil into the centre of the tube and keeps it away from the tube's walls, it would prevent dust from escaping. You can move massive amounts of lunar regolith without kicking up all the dust, Eimer says. Early tests suggest the plan will work. He and Taylor have built a small prototype a few centimetres long that successfully picks up simulated lunar soil. Daniel Durda of the Southwest Research Institute in Boulder, Colorado, US, says developing ways to keep dust to a minimum is important. It's a real concern, he told New Scientist. Something like this is probably better than a bunch of bulldozers picking it up and dumping it. Temperature swings The research was presented on Thursday at the Lunar and Planetary Society Conference in Houston, Texas. Another study presented on Thursday suggests burying lunar habitats could help regulate their temperature. On the airless Moon, the surface bakes to over 100º Celsius during the day and plunges to a frigid -150º C at night. But these wild temperature swings could be eliminated by burying a lunar habitat with bags of lunar soil, according to a study led by Bela Boldoghy of Ferroelektric Engineering Pan Konceptum in Budapest, Hungary. Under 10 to 15 metres of lunar soil, the temperature would hover without further intervention around -20º C. Although that is bitterly cold, the stable temperature would make it much easier to regulate the base's thermostat. Pre-bagged soil Minus 20 is not too difficult, study co-author Tamas Varga of the VTPatent Agency in Budapest told New Scientist. A lot of places on Earth are -20 degrees. Burying the habitat with pre-bagged soil instead of simply dumping loose soil on top of it would also avoid kicking up dust, the researchers say, adding that the messy job of bagging the soil could be done far away from the base. Durda says seesawing temperatures would not be a problem if the base was built near the Moon's poles, where there are places permanently in shadow. But in other regions it would be an issue, he says, and burying the habitat is one way to deal with the temperature swings. Regolith can also block hazardous energetic particles from space, he adds, so burying would have that added benefit of radiation protection. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Topics for collection of wisdoms
Darren That SUCKS! Jerry Flaherty - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Monday, March 19, 2007 11:46 AM Subject: Re: [meteorite-list] Topics for collection of wisdoms On Fri, 16 Mar 2007 22:17:22 -0600, you wrote: or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? This seems to fit here: http://space.newscientist.com/article/dn11406-magnetic-elephant-trunk-sucks-up-lunar-soil.html?DCMP=Matt_Sparkesnsref=trunk Magnetic 'elephant trunk' sucks up lunar soil 21:57 16 March 2007 NewScientist.com news service David Shiga, Houston Elephants' trunks are remarkable tools. Boasting more muscles than the human body, the appendages can knock down trees and suck in several gallons of water, spraying it into their owners' mouths or over their vast bodies. Now, researchers say elephant trunk-like devices may be useful on the Moon, as well. And they have developed a prototype of a magnetic, trunk-like tube that can collect lunar soil without kicking up hazardous dust. Future astronauts living on the Moon will need lots of water, oxygen and other resources that can be extracted from the lunar soil, or regolith. But collecting the large quantities needed with front-end loaders and dump trucks could throw up a lot of dust. That could cause a host of problems, since the tiny, jagged dust particles could clog machinery and even harm astronauts' health if inhaled (see Martian dust may be hazardous to your health). In a bid to solve the problem, Benjamin Eimer and Lawrence Taylor, both of the University of Tennessee in Knoxville, US, are developing a magnetic device designed to collect soil without creating clouds of the powdery dust. This idea is akin to a leaf sucker, Eimer told New Scientist. Magnetic coils The idea is to build a flexible tube with magnetic coils spaced at regular intervals along its length. Because lunar soil particles contain a lot of iron, the magnetic field produced by the coils would suck the soil into the tube and whisk it along its length. A relatively small tube would be used by an astronaut or robot to pick up soil and feed it into a larger magnetic 'pipeline' leading back to storage facilities or processing plants at the lunar base. Many of these flexible tubes could be attached to the same pipeline - like veins in a leaf, allowing soil to be collected from a large area. And because the magnetic field channels the soil into the centre of the tube and keeps it away from the tube's walls, it would prevent dust from escaping. You can move massive amounts of lunar regolith without kicking up all the dust, Eimer says. Early tests suggest the plan will work. He and Taylor have built a small prototype a few centimetres long that successfully picks up simulated lunar soil. Daniel Durda of the Southwest Research Institute in Boulder, Colorado, US, says developing ways to keep dust to a minimum is important. It's a real concern, he told New Scientist. Something like this is probably better than a bunch of bulldozers picking it up and dumping it. Temperature swings The research was presented on Thursday at the Lunar and Planetary Society Conference in Houston, Texas. Another study presented on Thursday suggests burying lunar habitats could help regulate their temperature. On the airless Moon, the surface bakes to over 100º Celsius during the day and plunges to a frigid -150º C at night. But these wild temperature swings could be eliminated by burying a lunar habitat with bags of lunar soil, according to a study led by Bela Boldoghy of Ferroelektric Engineering Pan Konceptum in Budapest, Hungary. Under 10 to 15 metres of lunar soil, the temperature would hover without further intervention around -20º C. Although that is bitterly cold, the stable temperature would make it much easier to regulate the base's thermostat. Pre-bagged soil Minus 20 is not too difficult, study co-author Tamas Varga of the VTPatent Agency in Budapest told New Scientist. A lot of places on Earth are -20 degrees. Burying the habitat with pre-bagged soil instead of simply dumping loose soil on top of it would also avoid kicking up dust, the researchers say, adding that the messy job of bagging the soil could be done far away from the base. Durda says seesawing temperatures would not be a problem if the base was built near the Moon's poles, where there are places permanently in shadow. But in other regions it would be an issue, he says, and burying the habitat is one way to deal with the temperature swings. Regolith can also block hazardous energetic particles from space, he adds, so burying would have that added benefit of radiation protection. __ Meteorite-list mailing list Meteorite-list
Re: [meteorite-list] Topics for collection of wisdoms
Martian meteorites ARE attracted to magnets. Try a piece of Dag 476, SAU 005 etc, they stick rather well to magnets. Michael Farmer --- Pete Pete [EMAIL PROTECTED] wrote: Mike Murray wrote: Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Good question, Mike, and one that I've thought about, too. Some Lunars appear to have such a varied brecciated interior, could there possibly be any of the original impactor embedded within? If Mars has its red hue due to the high iron oxide content, are Martians even minutely magnetic? Cheers, Pete From: Michael Murray [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Subject: [meteorite-list] Topics for collection of wisdoms Date: Fri, 16 Mar 2007 22:17:22 -0600 Hi List, Here are a couple questions that might inspire a topic for a Collection of Wisdoms - Magnetic properties of stonys. I'm curious to know if anyone has undertaken the task of testing and documenting the magnetic properties found in the different groups and/ or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Michael Murray __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list _ Get Out Of The House - Ski, Skate Sun http://local.live.com/?mkt=en-ca/?v=2cid=A6D6BDB4586E357F!147 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Topics for collection of wisdoms
Hi, to common magnets, or very strong magnets? I have a few different martian samples, and they are all not attracted to the magnet. I know that martians can have magnetism, but i thought it's so less that you need very sensitive instruments? Cheers, Carsten. Martian meteorites ARE attracted to magnets. Try a piece of Dag 476, SAU 005 etc, they stick rather well to magnets. Michael Farmer --- Pete Pete [EMAIL PROTECTED] wrote: Mike Murray wrote: Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Good question, Mike, and one that I've thought about, too. Some Lunars appear to have such a varied brecciated interior, could there possibly be any of the original impactor embedded within? If Mars has its red hue due to the high iron oxide content, are Martians even minutely magnetic? Cheers, Pete From: Michael Murray [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Subject: [meteorite-list] Topics for collection of wisdoms Date: Fri, 16 Mar 2007 22:17:22 -0600 Hi List, Here are a couple questions that might inspire a topic for a Collection of Wisdoms - Magnetic properties of stonys. I'm curious to know if anyone has undertaken the task of testing and documenting the magnetic properties found in the different groups and/ or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Michael Murray __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list _ Get Out Of The House - Ski, Skate Sun http://local.live.com/?mkt=en-ca/?v=2cid=A6D6BDB4586E357F!147 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.13/725 - Release Date: 17.03.2007 12:33 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Topics for collection of wisdoms
As for the magnetic properties of stones, follow this link. http://www.caillou-noir.com/magnetic-susceptibility_SM30.htm If I'm not totally wrong, magnetic susceptibility of a meteorite is basically how hard a magnet is attracted to a meteorite. If I'm wrong I will surely be corrected on the list. ;-) http://en.wikipedia.org/wiki/Magnetic_susceptibility /Göran Michael Murray wrote: Hi List, Here are a couple questions that might inspire a topic for a Collection of Wisdoms - Magnetic properties of stonys. I'm curious to know if anyone has undertaken the task of testing and documenting the magnetic properties found in the different groups and/or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Michael Murray __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Topics for collection of wisdoms
Hi Micheal, Here is a good link. http://www.caillou-noir.com/magnetic-susceptibility_SM30.htm Thanks, Joe Kerchner - Original Message From: Michael Murray [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Friday, March 16, 2007 11:17:22 PM Subject: [meteorite-list] Topics for collection of wisdoms Hi List, Here are a couple questions that might inspire a topic for a Collection of Wisdoms - Magnetic properties of stonys. I'm curious to know if anyone has undertaken the task of testing and documenting the magnetic properties found in the different groups and/ or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Michael Murray __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains. http://farechase.yahoo.com/promo-generic-14795097__ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Topics for collection of wisdoms
Mike Murray wrote: Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Good question, Mike, and one that I've thought about, too. Some Lunars appear to have such a varied brecciated interior, could there possibly be any of the original impactor embedded within? If Mars has its red hue due to the high iron oxide content, are Martians even minutely magnetic? Cheers, Pete From: Michael Murray [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Subject: [meteorite-list] Topics for collection of wisdoms Date: Fri, 16 Mar 2007 22:17:22 -0600 Hi List, Here are a couple questions that might inspire a topic for a Collection of Wisdoms - Magnetic properties of stonys. I'm curious to know if anyone has undertaken the task of testing and documenting the magnetic properties found in the different groups and/ or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Michael Murray __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list _ Get Out Of The House - Ski, Skate Sun http://local.live.com/?mkt=en-ca/?v=2cid=A6D6BDB4586E357F!147 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Topics for collection of wisdoms
Hi List, Here are a couple questions that might inspire a topic for a Collection of Wisdoms - Magnetic properties of stonys. I'm curious to know if anyone has undertaken the task of testing and documenting the magnetic properties found in the different groups and/ or sub-groups of stony meteorites. I'm curious to know too... Most articles I have read on Martian and Lunar pieces say they are not attracted to a magnet. Is this known to be without exception? Michael Murray __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
