[meteorite-list] Fwd: Re: When the Moon hits your eye like a really, really, really big pizza pie
Rob, You said And don't get me started on the meteors burning all the way to the ground I'm no expert but? Meteors may not burn all the way to the ground but it is believed possible that an impact can be hot enough to melt the ground into Tektite glass, right? So, wouldn't that generate sufficient heat to start a fire if it hit a source of fuel like a wooded area? Carancas hit hard enough to boil the water in the water well it hit (true fact). Many witnesses to that. But there was no fuel there to burn so no actual fire broke out. So, I can almost see why they would depict the meteors as hot and fiery but the real cause of fires being started is from the heat caused by the impact not the heat of the actual meteor, right? My 2 cents. Carl Esparza IMCA 5829 Rob McCafferty rob_mccaffe...@yahoo.com wrote: Seriously, I'm in the wrong job. I've spent much of the last year putting together a mission to Mars game for our school. You can select individual crew members. For example, one is from the Kashmir region of India, one of her languages is a local dialect and her name is a traditional Kashmiri name, all carefully researched. If I'm capable of this level of attention to detail then how are the makers of Impact capable of getting something on the air that includes a fallen lunar meteorite crater that is so magnetic it disrupts a compass from a distance? I mean, if that's supposed to show some sort of research into meteorites it pays lipservice only. I want to go round and bite their ankles. And don't get me started on the meteors burning all the way to the ground or shooting down meteor fragments with F-15 fighters. ARRRGGGH! At least Space 1999, had a the excuse of naievety to much of it. Anyone remember the scene in 3rd Rock From the Sun where they were laughing at Star Wars' depiction of space? Impact would have them in apoplexy. --- On Mon, 6/15/09, Sterling K. Webb sterling_k_w...@sbcglobal.net wrote: From: Sterling K. Webb sterling_k_w...@sbcglobal.net Subject: Re: [meteorite-list] When the Moon hits your eye like a really, really, really big pizza pie To: cyna...@charter.net, Meteorite-list@meteoritecentral.com Date: Monday, June 15, 2009, 7:43 PM Hi, Darren, List, The commentator who thinks this sets a new low for American television and astronomical science was obviously fortunate enough to have missed the series Space 1999 (to name only one). Sterling K. Webb --- - Original Message - From: Darren Garrison cyna...@charter.net To: Meteorite-list@meteoritecentral.com Sent: Monday, June 15, 2009 11:21 AM Subject: [meteorite-list] When the Moon hits your eye like a really, really,really big pizza pie http://blogs.discovermagazine.com/badastronomy/2009/06/15/if-i-watch-this-i-hope-the-moon-will-hit-the-earth/ __ 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 __ 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] Fwd: Re: When the Moon hits your eye like a really, really, really big pizza pie
Carl, My understanding of this phenomena is that the meteoroid must be very large to hold enough heat all the way to the ground sufficient enough to possibly start a fire. In other words it would most likely haver to be traveling at cosmic velocity at impact with the ground. Which is not possible for a small sized meteoroid. Of course the word small is subjective. So to answer your question I would say yes. A very large meteorite impact causes intense heat... Probably enough to start a fire, but only if the meteoroid has enough mass and speed. The angle of decent has a lot to do with the ability of the meteoroid to retain it's cosmic velocity. As does it's composition. If it's a stony meteorite and very large it might make impact and may be hot but we don't know really. Look at Carancas meteorite. This chondrite was supposedly 10 ft in diameter according to Wikipedia's article here: http://en.wikipedia.org/wiki/2007_Peruvian_meteorite_event It blew out windows 1km away, and the crater was some 43 feet across and 15 ft deep. The SAO/NASA ADS at Harvard.edu site has the speed at 2-4 kms, And the size at 0.9 to 1.7 m. Still small... ...This example demonstrates that meteoroid strength can vary significantly from case to case and does not depend on meteoroid size... The West, Texas fall (Ash Creek) was reported by eye witnesses to be as large as a truck. That would be a few tons in weight. Peekskill of course was supposedly warm to the touch right after falling. And then of course you have the report just a little while back about a supposed meteorite being so hot right after falling in the middle of a village in India that the valligers had to douse it with water to cool it enough to touch. This didn't seem right to me, and I thought it might have been sensationalist reporting. Not to mention the unconfirmed story of a pea sized meteorite hitting a German boy just last week. Reportedly this meteoroid was traveling at 30,000 mph when it struck the boy in the back of the hand. NOT! So why did the West Texas, and Peekskill meteoroids breakup? For that matter, Consider Buzzard Coulee too. If what the information on Harvard's site says is correct, then composition has a lot to do with a meteoroid retaining enough speed to make a crater, or be hot upon impact. Considering this why wouldn't it be feasible to compare compositions, angle of descent, and speed to figure out why Carancas created a crater and the other recent falls didn't. Buzzard Coulee - H4 Carancas - H4-5 West Texas (Ash Creek) - L6 Peekskill - H6 Park Forest - L5 What does it take for a meteorite to be hot after impact? It varies... All conditions have to be perfect. Are there really too many variables to consider? Regards, Eric Wichman Meteorites USA dtuc...@cox.net wrote: Rob, You said And don't get me started on the meteors burning all the way to the ground I'm no expert but? Meteors may not burn all the way to the ground but it is believed possible that an impact can be hot enough to melt the ground into Tektite glass, right? So, wouldn't that generate sufficient heat to start a fire if it hit a source of fuel like a wooded area? Carancas hit hard enough to boil the water in the water well it hit (true fact). Many witnesses to that. But there was no fuel there to burn so no actual fire broke out. So, I can almost see why they would depict the meteors as hot and fiery but the real cause of fires being started is from the heat caused by the impact not the heat of the actual meteor, right? My 2 cents. Carl Esparza IMCA 5829 Rob McCafferty rob_mccaffe...@yahoo.com wrote: Seriously, I'm in the wrong job. I've spent much of the last year putting together a mission to Mars game for our school. You can select individual crew members. For example, one is from the Kashmir region of India, one of her languages is a local dialect and her name is a traditional Kashmiri name, all carefully researched. If I'm capable of this level of attention to detail then how are the makers of Impact capable of getting something on the air that includes a fallen lunar meteorite crater that is so magnetic it disrupts a compass from a distance? I mean, if that's supposed to show some sort of research into meteorites it pays lipservice only. I want to go round and bite their ankles. And don't get me started on the meteors burning all the way to the ground or shooting down meteor fragments with F-15 fighters. ARRRGGGH! At least Space 1999, had a the excuse of naievety to much of it. Anyone remember the scene in 3rd Rock From the Sun where they were laughing at Star Wars' depiction of space? Impact would have them in apoplexy. --- On Mon, 6/15/09, Sterling K. Webb sterling_k_w...@sbcglobal.net wrote: From: Sterling K. Webb sterling_k_w...@sbcglobal.net Subject: Re: [meteorite-list] When the Moon hits your eye like a really, really, really big pizza pie To:
Re: [meteorite-list] Fwd: Re: When the Moon hits your eye like a really, really, really big pizza pie
True enough, all that kinetic energy has to go somewhere and heat is how it's dissipated. I'm pretty sure a 500m bolide would still be glowing as it hit the ground but the fireball is hundreds of times bigger than the meteorite and the ground under one such meteorite would likely be ignited BEFORE touchdown by compression shock heating in front of the meteorite. No problems with this but this had car sized objects racing in, on fire that were clearly not at cosmic velocities and they produced explosions on contact that looked like gas stations exploding. It's all too silly to even talk about any longer. It's not like the show was even that good from an entertainment point of view. --- On Tue, 6/16/09, cdtuc...@cox.net cdtuc...@cox.net wrote: From: cdtuc...@cox.net cdtuc...@cox.net Subject: [meteorite-list] Fwd: Re: When the Moon hits your eye like a really, really, really big pizza pie To: meteoritelist meteorite-list@meteoritecentral.com Date: Tuesday, June 16, 2009, 7:47 PM Rob, You said And don't get me started on the meteors burning all the way to the ground I'm no expert but? Meteors may not burn all the way to the ground but it is believed possible that an impact can be hot enough to melt the ground into Tektite glass, right? So, wouldn't that generate sufficient heat to start a fire if it hit a source of fuel like a wooded area? Carancas hit hard enough to boil the water in the water well it hit (true fact). Many witnesses to that. But there was no fuel there to burn so no actual fire broke out. So, I can almost see why they would depict the meteors as hot and fiery but the real cause of fires being started is from the heat caused by the impact not the heat of the actual meteor, right? My 2 cents. Carl Esparza IMCA 5829 Rob McCafferty rob_mccaffe...@yahoo.com wrote: Seriously, I'm in the wrong job. I've spent much of the last year putting together a mission to Mars game for our school. You can select individual crew members. For example, one is from the Kashmir region of India, one of her languages is a local dialect and her name is a traditional Kashmiri name, all carefully researched. If I'm capable of this level of attention to detail then how are the makers of Impact capable of getting something on the air that includes a fallen lunar meteorite crater that is so magnetic it disrupts a compass from a distance? I mean, if that's supposed to show some sort of research into meteorites it pays lipservice only. I want to go round and bite their ankles. And don't get me started on the meteors burning all the way to the ground or shooting down meteor fragments with F-15 fighters. ARRRGGGH! At least Space 1999, had a the excuse of naievety to much of it. Anyone remember the scene in 3rd Rock From the Sun where they were laughing at Star Wars' depiction of space? Impact would have them in apoplexy. --- On Mon, 6/15/09, Sterling K. Webb sterling_k_w...@sbcglobal.net wrote: From: Sterling K. Webb sterling_k_w...@sbcglobal.net Subject: Re: [meteorite-list] When the Moon hits your eye like a really, really, really big pizza pie To: cyna...@charter.net, Meteorite-list@meteoritecentral.com Date: Monday, June 15, 2009, 7:43 PM Hi, Darren, List, The commentator who thinks this sets a new low for American television and astronomical science was obviously fortunate enough to have missed the series Space 1999 (to name only one). Sterling K. Webb --- - Original Message - From: Darren Garrison cyna...@charter.net To: Meteorite-list@meteoritecentral.com Sent: Monday, June 15, 2009 11:21 AM Subject: [meteorite-list] When the Moon hits your eye like a really, really,really big pizza pie http://blogs.discovermagazine.com/badastronomy/2009/06/15/if-i-watch-this-i-hope-the-moon-will-hit-the-earth/ __ 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 __ 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
