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#1
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"Holy Extraterrestrial Matter, Batman!"
"Although the name 'Dee Riddle' causes more than a little suspicion on
my part, Robin.": http://www.newsvine.com/_news/2007/0...rikes-ill-home Okay... how exactly how can a rock falling through around fifty miles of atmosphere end up going in any direction but pretty much straight down by the time it impacts? Pat |
#2
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"Holy Extraterrestrial Matter, Batman!"
On Mar 8, 7:37 am, Pat Flannery wrote:
Okay... how exactly how can a rock falling through around fifty miles of atmosphere end up going in any direction but pretty much straight down by the time it impacts? It has a large ballistic coefficient? Remember, ICBM RVs with large ballistic coefficients entering the atmosphere slower than most meteors arrive at the surface at a considerable angle. http://img.rtvslo.si/upload/Svet/kwajalein_show.jpg http://www.afa.org/magazine/Oct2005/ICBM01.jpg |
#3
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"Holy Extraterrestrial Matter, Batman!"
Allen Thomson wrote: It has a large ballistic coefficient? Remember, ICBM RVs with large ballistic coefficients entering the atmosphere slower than most meteors arrive at the surface at a considerable angle. http://img.rtvslo.si/upload/Svet/kwajalein_show.jpg http://www.afa.org/magazine/Oct2005/ICBM01.jpg Yeah, but this object is about the size of a pack of cards according to the report, even if it's a nickel-iron, it's not going to be more than four or five pounds in weight, and it won't be streamlined either. The MIRVs in the photos are heavy and streamlined, and are coming in so fast that they are ablating all the way to impact. If it had been in anything other than free-fall, it should have blown a hole right through the window and continued right through the desk and floor, like a free-falling cannonball would. There are a lot of cases of small free-falling meteorites doing considerable damage: http://astro.wsu.edu/worthey/astro/h...r/strikes.html "5. Donahue near-miss. Nov. 8, 1982, in Weathersfield, Connecticutt. Robert and Wanda Donahue settled down for a quiet evening watching television. About halfway through M*A*S*H, they heard a loud crash from the front of the house. They ran into the living room to find a hole in the ceiling and plaster dust and smoke everywhere. Moving outside, they saw a hole in the roof. They called the fire department and ten minutes later, a fireman found a six-pound, five-inch meteorite under the dining room table. The stone had ripped through the roof and living room ceiling, bounced off a carpeted wooden floor (cracking a support beam for the floor in the process), traveled up through the ceiling a second time into the attic, came down through the ceiling in the dining room, knocked over furniture and dented a wall before coming to rest under the table. Six more small fragments of the meteorite were later found in the Donahue's vacuum cleaner, which Mrs. Donahue had used to tidy up the house a bit before all the scientists and media arrived." That's more like one would expect. The amount of damage it did seems too small for an object in free-fall, and it's strange angled impact with the house seems odd also. Unless it hit something outside and then bounced through the window, I suspect that somebody threw it through the window. Why buy something as expensive as a meteorite just to toss it through a window? Simple...what do you think a meteorite with the news story about how it hit a house would sell for on ebay? Pat |
#4
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"Holy Extraterrestrial Matter, Batman!"
On Thu, 8 Mar 2007 10:31:42 -0600, Pat Flannery wrote
(in article ): Yeah, but this object is about the size of a pack of cards according to the report, even if it's a nickel-iron, it's not going to be more than four or five pounds in weight, and it won't be streamlined either. The MIRVs in the photos are heavy and streamlined, and are coming in so fast that they are ablating all the way to impact. If it had been in anything other than free-fall, it should have blown a hole right through the window and continued right through the desk and floor, like a free-falling cannonball would. Of course it was in free-fall, Pat. What else would it be? ;-) Unless it hit something outside and then bounced through the window, I suspect that somebody threw it through the window. I suspect it came in at an angle because it entered the atmosphere at an angle, and that it may well have clipped a tree nearby. -- You can run on for a long time, Sooner or later, God'll cut you down. ~Johnny Cash |
#5
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"Holy Extraterrestrial Matter, Batman!"
Herb Schaltegger wrote: Of course it was in free-fall, Pat. What else would it be? ;-) It will be slowed by the atmosphere till it reaches terminal velocity. Maybe if it was odd shaped enough it might start gliding sideways to some extent as it descended, but I can't picture it doing that well enough to come flying through a window into a room Unless it hit something outside and then bounced through the window, I suspect that somebody threw it through the window. I suspect it came in at an angle because it entered the atmosphere at an angle, and that it may well have clipped a tree nearby. Something that low in weight would lose all of its latent horizontal velocity long before impact. Any horizontal velocity would have to be due to some aerodynamic effect on it as it fell at its terminal velocity, and although I can picture it coming down in a spiral of some sort, as it spun on its axis (in fact that would be very likely one would think, unless it was a perfect disc, sphere, teardrop, or some other smooth and symmetrical aerodynamic form) I don't think its going to come down at a angle that let it build up any significant horizontal velocity unless it grew a vertical fin to keep it straight and gliding in one direction. Now if it hit something and bounced off before going through the window, that would make sense. If it hit a inclined surface at high speed (like a tree's inclined trunk), that could slow it and get it going sideways both at once. There's a good photo of it he http://www.smh.com.au/news/world/met...166842929.html Here's another shot, showing its size and that it's basically disc shaped: http://www.fox28.com/Images/030707meteor.jpg Pat |
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