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Posted: 5/1/2016 2:35:11 PM EDT
[#1]
Quote HistoryQuoted:
Velocity matters a lot more than size. https://www.wikipremed.com/image_science_archive_68/010103_68/104950_05901_68.jpg Quote HistoryQuoted:
Quoted:
no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile Velocity matters a lot more than size. https://www.wikipremed.com/image_science_archive_68/010103_68/104950_05901_68.jpg That's what I keep telling my wife, but she ain't buying it. 
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Posted: 5/1/2016 2:36:47 PM EDT
[#2]
Cool, but a definite Clark Griswold/Grand Canyon moment.
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Posted: 5/1/2016 2:38:06 PM EDT
[#3]
Man... Good thing it didn't hit that building!
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Posted: 5/1/2016 2:57:02 PM EDT
[#4]
Quote HistoryQuoted:
Imagine you are talking to some guy who knows nothing about firearms, handed him a 55gr 5.56mm bullet, and told him that this could easily kill a man. He might laugh at the idea that anything that small could be so destructive, no matter how hard you threw it. But, in his experiences, he is thinking of how fast you can throw something. Baseball pitchers can throw a fastball at about 140fps or so. A 5.56mm bullet is “thrown” at about 3,000fps, (depending on all the stuff everyone here is very familiar with.) That’s 21 times faster. Escape velocity from Earth is 7 miles per second, and this is the absolute lowest speed a meteor can hit Earth’s atmosphere. The Earth moves around the sun at something like 19 miles a second and everything else is moving around at similar speeds. So it’s real easy to get an impact speed of 10, 15, or 20 miles per second. That really fast 5.56mm bullet exits the barrel doing slightly less than 0.6 miles per second. OK… Now, the volume of a sphere is 4/3*pi*r^3 So, if the meteorite was 150 feet in diameter, and it were a perfect sphere, then its total volume was 1,766,250 cubic feet. A cubic foot of water weights a bit over 62 pounds. Nickel/iron weighs about 8 times what water does. So, that meteorite would have weighed 876,060,000 pounds or 438,000 tons. Now, the way if figure it, explosions are destructive because the explosive compound decomposes with so much energy that all the atoms of the explosive start moving in random directions really fast. How fast, well, TNT has a velocity of about 4.3 miles per second which is a lot slower than that meteorite was moving when it hit. You know that a relatively tiny device called a “hydrogen bomb” can produce craters like that, right? Then it should be easy to see how some 150 foot chunk of iron moving at those kinds of speeds could do the same thing. Quote HistoryQuoted:
Quoted:
no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile Imagine you are talking to some guy who knows nothing about firearms, handed him a 55gr 5.56mm bullet, and told him that this could easily kill a man. He might laugh at the idea that anything that small could be so destructive, no matter how hard you threw it. But, in his experiences, he is thinking of how fast you can throw something. Baseball pitchers can throw a fastball at about 140fps or so. A 5.56mm bullet is “thrown” at about 3,000fps, (depending on all the stuff everyone here is very familiar with.) That’s 21 times faster. Escape velocity from Earth is 7 miles per second, and this is the absolute lowest speed a meteor can hit Earth’s atmosphere. The Earth moves around the sun at something like 19 miles a second and everything else is moving around at similar speeds. So it’s real easy to get an impact speed of 10, 15, or 20 miles per second. That really fast 5.56mm bullet exits the barrel doing slightly less than 0.6 miles per second. OK… Now, the volume of a sphere is 4/3*pi*r^3 So, if the meteorite was 150 feet in diameter, and it were a perfect sphere, then its total volume was 1,766,250 cubic feet. A cubic foot of water weights a bit over 62 pounds. Nickel/iron weighs about 8 times what water does. So, that meteorite would have weighed 876,060,000 pounds or 438,000 tons. Now, the way if figure it, explosions are destructive because the explosive compound decomposes with so much energy that all the atoms of the explosive start moving in random directions really fast. How fast, well, TNT has a velocity of about 4.3 miles per second which is a lot slower than that meteorite was moving when it hit. You know that a relatively tiny device called a “hydrogen bomb” can produce craters like that, right? Then it should be easy to see how some 150 foot chunk of iron moving at those kinds of speeds could do the same thing. 
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Posted: 5/1/2016 3:11:13 PM EDT
[#5]
I had a comment but I'm not shitting in someone's thread, so I'll go with cool thread!
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Posted: 5/1/2016 3:20:43 PM EDT
[#6]
Kudos to Thuban for actually providing an intelligent response to my comment supported with actual data.
Posted Via AR15.Com Mobile |
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Posted: 5/1/2016 3:28:13 PM EDT
[#7]
Quote HistoryQuoted:
Velocity matters a lot more than size. https://www.wikipremed.com/image_science_archive_68/010103_68/104950_05901_68.jpg Quote HistoryQuoted:
Quoted:
no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile Velocity matters a lot more than size. https://www.wikipremed.com/image_science_archive_68/010103_68/104950_05901_68.jpg Pearls before swine ... |
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Posted: 5/1/2016 3:35:43 PM EDT
[#8]
Interesting for about 3 minutes is right. Stopped in there on the way to CWW2.
"Yep. That's a big a hole in the ground.... ok moving on..." |
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Posted: 5/1/2016 3:56:17 PM EDT
[#9]
For those wondering about the structures down in the crater, it was an attempt to mine the big lump of nickel-iron they thought was just below the surface. They spent quite a bit money and effort, with only small bits and pieces being recovered. The problem was that the meteorite wasn't big enough to survive the impact intact, or in large enough pieces to be recovered. Impacts have occurred in the past that have left mineable deposits of nickel-iron, such as the Sudbury Basin in Canada...that one was estimated to be 6.5 to 9 miles wide. 
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Posted: 5/1/2016 4:21:05 PM EDT
[#10]
Quote HistoryQuoted:
This one in Australia is now considered the largest impact in Earth's history. The asteroid split into two 6 mile wide objects creating twin craters spanning 250 miles. Previous record holder was the Vredefort Crater in South Africa. Link: Asteroid Impact There may be one in Antarctica that's even larger than that and it may be linked to the "Great Dying" (Permian-Triassic extinction) that paved the way for the dinosaurs: Antarctica Giant Impact Crater |
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Posted: 5/1/2016 4:34:54 PM EDT
[#11]
Quote HistoryQuoted:
I believe it was the first discovery of a meteor in the world. Astronauts trained on the bottom in the 1960's. In the museum, an employee was telling kids that if they could pick up the 1.5ft meteorite on display they can take it home. Kids tried, the employee informed them that it weighs as much as a Volkswagen Beetle. That thing is more dense than the spectators at Democratic Conventions. Nope. The ancients used meteoric iron for tools and weapons before the iron age. |
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Posted: 5/1/2016 4:43:47 PM EDT
[#12]
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Imagine something happening like that again. It would be total chaos. Lucifers Hammer |
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Posted: 5/1/2016 7:16:17 PM EDT
[#13]
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no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile Are you being serious? Because, physics. |
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Posted: 5/1/2016 7:21:58 PM EDT
[#14]
Quote HistoryQuoted:
All rocks are from space. Time+pressure changed the rocks to look different on Earth. Hell, the rock you bought it from the same star as the Earth and all of the other matter in our solar system and it escaped for a little while, then came back. Quote HistoryQuoted:
Quoted:
Hey I've been there! Awesome place! At the recent gem and mineral show, I picked up a chunk of meteorite from Argentina. It was in SPACE! SPACE ROCK!!! All rocks are from space. Time+pressure changed the rocks to look different on Earth. Hell, the rock you bought it from the same star as the Earth and all of the other matter in our solar system and it escaped for a little while, then came back. Fine. It is a VINTAGE space rock, probably about as old as the earth is, and unmolested by weathering, tectonic forces, mixing and melding with other elements and minerals. |
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Posted: 5/1/2016 7:23:50 PM EDT
[#15]
Quote HistoryQuoted: I am not sure how that is possible since the earth is only about 6,000 years old Obviously it's a fake. |
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Posted: 5/1/2016 7:24:19 PM EDT
[#16]
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Been to those a long time ago. Neat history of our planet. |
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Posted: 5/1/2016 7:25:40 PM EDT
[#17]
... It's in my "backyard". Enjoy visiting it when I'm close by. Get something different out of it each time
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Posted: 5/1/2016 7:30:28 PM EDT
[#18]
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Nougat. Quote HistoryQuoted:
Quoted:
What's in the middle? Nougat. I lost. |
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Posted: 5/1/2016 7:35:26 PM EDT
[#19]
Quote HistoryQuoted:
Velocity matters a lot more than size. https://www.wikipremed.com/image_science_archive_68/010103_68/104950_05901_68.jpg Quote HistoryQuoted:
Quoted:
no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile Velocity matters a lot more than size. https://www.wikipremed.com/image_science_archive_68/010103_68/104950_05901_68.jpg So what you're say'n is, it's not the size that matters but more how you use it? |
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Posted: 5/1/2016 7:36:31 PM EDT
[#20]
Quote HistoryQuoted: So what you're say'n is, it's not the size that matters but more how you use it? Quote HistoryQuoted: Quoted: Quoted: no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile Velocity matters a lot more than size. https://www.wikipremed.com/image_science_archive_68/010103_68/104950_05901_68.jpg So what you're say'n is, it's not the size that matters but more how you use it? |
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Posted: 5/2/2016 12:25:25 AM EDT
[#21]
Quote HistoryQuoted: no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile This is the largest remaining chunk of the Barringer meteorite.  It's about the size of two basketballs. The curator let me try to lift it. I am pretty damn strong...I put EVERYTHING into it and I couldn't even BEGIN to feel this thing want to think about possibly even considering moving. Now make it 150 feet in diameter SPHERICALLY and move it at around 20,000 feet per second. |
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Posted: 5/2/2016 12:29:23 AM EDT
[#22]
The parking lot is nice.
Wife and I stopped there a couple years ago on our way to Vegas. Walked in and saw the price and decided I can see all the pictures I could want of a crater in the ground for free online. |
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Posted: 5/2/2016 7:13:16 AM EDT
[#23]
Quote History |
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Posted: 5/2/2016 7:29:43 AM EDT
[#24]
I only visited it once when I lived there; cool place none the less.
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Posted: 5/2/2016 7:35:34 AM EDT
[#25]
It was back before I had a cell phone, but I always had to stop at a pay phone in Winslow just to call someone I knew and state "I'm a standing on a corner in Winslow AZ..." What a dork
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Posted: 5/2/2016 7:43:34 AM EDT
[#26]
Quote HistoryQuoted:
So how do we know it was only 150 feet? Math. |
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Posted: 5/2/2016 8:00:52 AM EDT
[#27]
Quote HistoryQuoted:
Ever look at the Gulf of Mexico pal? Quote HistoryQuoted:
Quoted:
This one in Australia is now considered the largest impact in Earth's history. The asteroid split into two 6 mile wide objects creating twin craters spanning 250 miles. Previous record holder was the Vredefort Crater in South Africa. Link: Asteroid Impact That is the Chicxulub crater formed 66 million years ago is 110 miles wide, 12 miles deep and is the THIRD largest behind the Vredefort and newly discovered Austrailan impact previously noted. You can read up here: Gulf of Mexico crater |
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Posted: 5/2/2016 8:24:50 AM EDT
[#28]
Quote HistoryQuoted:
It cracks me up that somebody bought the crater, and tried to find the asteroid to no avail. All that time, the remnants were right under his feet, right in the dirt he sifted, in the form of microscopic iron droplets. How could anyone think that the object which made that hole would have survived? It hate to rain on your parade, but it is only in the last 50 years or so that the we have figured these things out. No one knew the size but most estimated it a lot bigger that it really was. I collected rocks as a kid over 50 years ago. Even then the theory of plate tectonics (First proposed in 1912 and then "disproven" by the scientific community) was pretty much laughed at by the more learned geology community. I have geology books from the 50's that don't mention it at all. Before that things like mountains etc were caused by the earth shrinking and cracking as it cooled over the ages. |
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Posted: 5/2/2016 8:34:58 AM EDT
[#29]
Quote HistoryQuoted: The parking lot is nice. Wife and I stopped there a couple years ago on our way to Vegas. Walked in and saw the price and decided I can see all the pictures I could want of a crater in the ground for free online. How much do they want? |
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Posted: 5/2/2016 8:35:30 AM EDT
[#30]
Quote HistoryQuoted:
Quote HistoryQuoted:
Quoted:
Quoted:
no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile Imagine you are talking to some guy who knows nothing about firearms, handed him a 55gr 5.56mm bullet, and told him that this could easily kill a man. He might laugh at the idea that anything that small could be so destructive, no matter how hard you threw it. But, in his experiences, he is thinking of how fast you can throw something. Baseball pitchers can throw a fastball at about 140fps or so. A 5.56mm bullet is “thrown” at about 3,000fps, (depending on all the stuff everyone here is very familiar with.) That’s 21 times faster. Escape velocity from Earth is 7 miles per second, and this is the absolute lowest speed a meteor can hit Earth’s atmosphere. The Earth moves around the sun at something like 19 miles a second and everything else is moving around at similar speeds. So it’s real easy to get an impact speed of 10, 15, or 20 miles per second. That really fast 5.56mm bullet exits the barrel doing slightly less than 0.6 miles per second. OK… Now, the volume of a sphere is 4/3*pi*r^3 So, if the meteorite was 150 feet in diameter, and it were a perfect sphere, then its total volume was 1,766,250 cubic feet. A cubic foot of water weights a bit over 62 pounds. Nickel/iron weighs about 8 times what water does. So, that meteorite would have weighed 876,060,000 pounds or 438,000 tons. Now, the way if figure it, explosions are destructive because the explosive compound decomposes with so much energy that all the atoms of the explosive start moving in random directions really fast. How fast, well, TNT has a velocity of about 4.3 miles per second which is a lot slower than that meteorite was moving when it hit. You know that a relatively tiny device called a “hydrogen bomb” can produce craters like that, right? Then it should be easy to see how some 150 foot chunk of iron moving at those kinds of speeds could do the same thing. Do you have enough info to figure out the "muzzle energy" in ft lbs? 
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Posted: 5/2/2016 8:43:30 AM EDT
[#31]
Quote HistoryQuoted:
How much do they want? Quote HistoryQuoted:
Quoted:
The parking lot is nice. Wife and I stopped there a couple years ago on our way to Vegas. Walked in and saw the price and decided I can see all the pictures I could want of a crater in the ground for free online. How much do they want? We went a little over two years ago. I feel better paying admission to a privately owned landmark than I do a National Park paid for by my tax dollars. |
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Posted: 5/2/2016 10:25:53 AM EDT
[#32]
Quote HistoryQuoted:
This is the largest remaining chunk of the Barringer meteorite. http://www.ar15.com/media/viewFile.html?i=78611 It's about the size of two basketballs. The curator let me try to lift it. I am pretty damn strong...I put EVERYTHING into it and I couldn't even BEGIN to feel this thing want to think about possibly even considering moving. Now make it 150 feet in diameter SPHERICALLY and move it at around 20,000 feet per second. Quote HistoryQuoted:
Quoted:
no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile This is the largest remaining chunk of the Barringer meteorite. http://www.ar15.com/media/viewFile.html?i=78611 It's about the size of two basketballs. The curator let me try to lift it. I am pretty damn strong...I put EVERYTHING into it and I couldn't even BEGIN to feel this thing want to think about possibly even considering moving. Now make it 150 feet in diameter SPHERICALLY and move it at around 20,000 feet per second. IIRC they found a lot of chunks of the original meteorite downrange from the crater where it "splashed" out after impact. |
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Posted: 5/11/2016 12:16:01 PM EDT
[#33]
Quote HistoryQuoted:
We went a little over two years ago. I feel better paying admission to a privately owned landmark than I do a National Park paid for by my every tax payers' tax dollars. Quote HistoryQuoted:
Quoted:
Quoted:
The parking lot is nice. Wife and I stopped there a couple years ago on our way to Vegas. Walked in and saw the price and decided I can see all the pictures I could want of a crater in the ground for free online. How much do they want? We went a little over two years ago. I feel better paying admission to a privately owned landmark than I do a National Park paid for by my every tax payers' tax dollars. Fixed it for you. |
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Posted: 5/11/2016 12:21:23 PM EDT
[#34]
Quote HistoryQuoted:
What's in the middle? it didn't hit the middle, it actually struck and an angle and the meteor was embedded in one of the side walls. |
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Posted: 5/11/2016 12:22:38 PM EDT
[#35]
Quote HistoryQuoted:
So how do we know it was only 150 feet? you can calculate the weight based on what it was made of and how big the hole is. Then you can calculate how big it would need to be to weigh that much. |
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Posted: 5/11/2016 12:23:23 PM EDT
[#36]
Quote HistoryQuoted:
Imagine something happening like that again. It would be total chaos. killed everything within 100 miles on impact. |
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Posted: 5/11/2016 12:24:57 PM EDT
[#37]
I had always heard that object was the size of a railroad car...
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Posted: 5/11/2016 12:25:54 PM EDT
[#38]
Quote HistoryQuoted:
no way a 150' wide meteor made a crater that big on impact alone. I don't care how fast it was moving. Posted Via AR15.Com Mobile F=MA and all the other ballistic equations. |
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Posted: 5/11/2016 12:28:54 PM EDT
[#39]
Quote HistoryQuoted:
How much do they want? Quote HistoryQuoted:
Quoted:
The parking lot is nice. Wife and I stopped there a couple years ago on our way to Vegas. Walked in and saw the price and decided I can see all the pictures I could want of a crater in the ground for free online. How much do they want? Almost two years ago now so my memory is a little rusty on that. I think it was like 37 bucks a person or so. |
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Posted: 5/11/2016 12:30:38 PM EDT
[#40]
Quote HistoryQuoted:
All rocks are from space. Time+pressure changed the rocks to look different on Earth. Hell, the rock you bought it from the same star as the Earth and all of the other matter in our solar system and it escaped for a little while, then came back. Quote HistoryQuoted:
Quoted:
Hey I've been there! Awesome place! At the recent gem and mineral show, I picked up a chunk of meteorite from Argentina. It was in SPACE! SPACE ROCK!!! All rocks are from space. Time+pressure changed the rocks to look different on Earth. Hell, the rock you bought it from the same star as the Earth and all of the other matter in our solar system and it escaped for a little while, then came back. Not quite true, as sedimentary and igneous rocks clearly have their origins here. If you want to argue that the original material for the earth was from space, then fine, but not all rocks started out in space. There are plenty of chemical and geological processes that disagree with the blanket statement made. |
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Posted: 5/11/2016 12:44:39 PM EDT
[#41]
Quote HistoryQuoted:
Imagine when something happenings like that again. It would will be total chaos. FIFY |
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