Re: [meteorite-list] Hot vs. Cold again...

[Chris Peterson via Meteorite-list]

Also important is to consider that the body in space may well have been 
a good fraction of a meter (or more) across. But a meteorite producing 
body didn't just ablate, it most likely fragments. And the small 
fragments very, very rapidly drop below the speed necessary to sustain 
ablation. So what we have left is fragments that are probably a bit 
below freezing being blasted for several minutes with very cold air. 
Small fragments means not much volume, but lots of surface area, so the 
heat transfer is pretty efficient.


It's hard to imagine a scenario where a meteorite is warm on landing. 
The interior will be cold, and the outer few millimeters might be near 
ambient, simply because of the warmer air encountered over the last 
minute or so of dark flight. But within a minute I'd expect the outside 
to get colder again because of transfer to the cold interior.


Chris

***
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

On 6/28/2016 10:10 PM, Rob Matson via Meteorite-list wrote:

Hi Elton,


Any body arriving from space is at least -60�c and closer to -120�c to -180�c 
based on
some black body studies of asteroids-- IIRC


The temperature for a typical earth-crossing asteroid with a chondritic 
composition is
actually likely to be warmer than this -- perhaps -20 C. Depends on how "black" 
the
original meteoroid was. Equilibrium temperatures for irons are quite a bit 
warmer.


The radiative cooling during dark flight is probably calculable and a missing 
factor in
estimating the state of heat content upon landing.


Not just a missing factor -- perhaps the dominant factor. 3-5 seconds of 
ablation is nothing
compared to 2-8 minutes of freefall through atmospheric temperatures as low as
-70 C. Basically you have a frozen, baked Alaska situation:  pre-atmosphere, a 
cold body
through and through. Then (in the case of non-irons), you expose this 
low-thermal-
conductivity mass to a brief blast of extreme heat that boils off the exterior 
almost as
fast as the heat can be conducted to the cold interior. Bur almost as soon as 
it starts, it's
over. You have a thin crust of hot material surrounding the still ice-cold 
interior. And for
the final act, you refreeze the exterior for a time period 20 to 100 times 
longer than
the ablative phase. For stony meteorites, there just isn't enough time to raise 
the
bulk temperature of the body.

So I disagree with this statement:

"An immediately-recovered, newly-fallen silicate/stony meteorite is 
usually--but briefly
"hot/uncomfortably warm" to the touch. The rind is very hot but lacks much heat 
reservoir."

As long as there is an extended period of freefall through the atmosphere (a 
very
reasonable assumption for non-cratering events), atmospheric cooling will 
always win out
for a stony meteorite.  --Rob


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Re: [meteorite-list] Hot vs. Cold again...

[Rob Matson via Meteorite-list]

Hi Elton,

> Any body arriving from space is at least -60�c and closer to -120�c to -180�c 
> based on
> some black body studies of asteroids-- IIRC

The temperature for a typical earth-crossing asteroid with a chondritic 
composition is
actually likely to be warmer than this -- perhaps -20 C. Depends on how "black" 
the
original meteoroid was. Equilibrium temperatures for irons are quite a bit 
warmer.

> The radiative cooling during dark flight is probably calculable and a missing 
> factor in
> estimating the state of heat content upon landing.

Not just a missing factor -- perhaps the dominant factor. 3-5 seconds of 
ablation is nothing
compared to 2-8 minutes of freefall through atmospheric temperatures as low as
-70 C. Basically you have a frozen, baked Alaska situation:  pre-atmosphere, a 
cold body
through and through. Then (in the case of non-irons), you expose this 
low-thermal-
conductivity mass to a brief blast of extreme heat that boils off the exterior 
almost as
fast as the heat can be conducted to the cold interior. Bur almost as soon as 
it starts, it's
over. You have a thin crust of hot material surrounding the still ice-cold 
interior. And for
the final act, you refreeze the exterior for a time period 20 to 100 times 
longer than
the ablative phase. For stony meteorites, there just isn't enough time to raise 
the
bulk temperature of the body.

So I disagree with this statement:

"An immediately-recovered, newly-fallen silicate/stony meteorite is 
usually--but briefly
"hot/uncomfortably warm" to the touch. The rind is very hot but lacks much heat 
reservoir."

As long as there is an extended period of freefall through the atmosphere (a 
very
reasonable assumption for non-cratering events), atmospheric cooling will 
always win out
for a stony meteorite.  --Rob


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Re: [meteorite-list] Hot vs Cold again...wasmMeteorite Crashes Through Thailand House Roof

[MEM via Meteorite-list]

This was looked into several times in the list history. I am recalling details 
from those discussions/my research.

Any body arriving from space is at least -60°c and closer to -120°c to -180°c 
based on some black body studies of asteroids-- IIRC


The temperature at the air-meteoroid boundary of entry exceeds the melting 
point of both iron and olivine. Most of that heat is carried off as an 
iron/silicate mist.  Each mili-second of incandescent flight an entirely new 
surface is formed. Inward traveling heat is being stripped away almost as fast 
as it is penetrating in low thermo-conducivity but much faster in high 
conductivity bodies (e.g iron).  The radiative cooling during dark flight is 
probably calculable and a missing factor in estimating the state of heat 
content upon landing.


One of the Weston CT meteorites formed a frost rind shortly after falling after 
sufficient time for all reentry heat to dissipate. I do not recall any other 
comments.  This was discovered by a fireman under the dining table.  I do not 
recall which other meteorite it was but, another was noted to have a frost rind 
after a few minutes. Other falls such as Sylacaga are silent as to the 
temperature.


Conclusions:

An immediately-recovered, newly-fallen silicate/stony meteorite is usually--but 
briefly "hot/uncomfortably warm" to the touch. The rind is very hot but lacks 
much heat reservoir. Heat penetration--based on measuring heated rims-- is 
somewhere between 2mm but not more than 6mm.  Beyond 6mm does not get above 
140° F proven by the domain reset of magnetite orientation in Martian 
Meteorites.  Be it remembered that an empty .50 cal brass case "feels" like it 
would burn you if it goes down one's shirt but lacks the heat content to cause 
burns.


Specific characterizations of hot/warm are hidden among the various accounts of 
some well known falls nearby humans. Monahans, Mbale, Allende, Murchison etc..  
If you disagree-- don't start some silly list fight--Do your own weeks of 
research reach your own conclusions!


Iron meteorites owing to a high coefficient of therm-conductivity are likely 
very hot to the touch and warm throughout. It is probably much like a piece of 
metal cut by a welding torch--no sign of bluing but very hot on the opposite 
end of the cut. 



Elton
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[meteorite-list] Dinosaur Eggs, Meteorites, Or Signs of an Ancient Civilisation?

[Paul via Meteorite-list]

It is strange that whoever wrote the headline even
considered that these concretions might be either
meteorites or dinosaur eggs. I guess those were
added simply to get people to read the article.

Dinosaur eggs, meteorites, signs of an ancient civilisation:
what are these giant balls? By Ann Liesowska, Siberian times
Found 30 metres underground at a coal mine, they're dubbed
'Jurassic pearls' or the marbles of a Siberian colossus.
http://siberiantimes.com/other/others/features/f0237-dinosaur-eggs-meteorites-signs-of-an-ancient-civilisation-what-are-these-giant-balls/

Siberia's 'Jurassic Pearls' Sign of Ancient Civilization;
Giant Balls Stun Locals by Jessica F, Nature world News,
http://www.natureworldnews.com/articles/24329/20160628/siberias-jurassic-pearls-sign-of-ancient-civilization-giant-balls-stun-locals.htm

Are Siberia's 'Jurassic Pearls' the remains of an ancient
civilisation? Bizarre colour-changing stones leave locals
stumped by Will Stewart, Daily Mail, June 27, 2016
http://www.dailymail.co.uk/sciencetech/article-3662007/Are-Siberia-s-Jurassic-Pearls-remains-ancient-civilisation-Bizarre-colour-changing-stones-leave-locals-stumped.html

For some pseudo-eggs, look at:
Dinosaur eggs' discovered in Chechnya (Photos, Video)
RT News, https://www.rt.com/news/chechnya-dinosaur-eggs-russia-333/

Huge Dinosaur Eggs Found in Chechnya,Scientists Claim
April 17, 2012 By Lama Hasan
http://abcnews.go.com/blogs/headlines/2012/04/huge-dinosaur-eggs-found-in-chechnyascientists-claim/

Other web pages about meter-scale concretions.

1. Prehistoric UFOs? (No, Meter-scale Concretions)
Hall of Ma'at - 
http://www.hallofmaat.com/read.php?1,604622,604622#msg-604622


2. Archaeologist claims boulder is the world's oldest
man-made sphere, Hall of Ma'at
http://www.hallofmaat.com/read.php?1,604086,604154#msg-604154

Yours,

Paul H.

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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Peter Scherff via Meteorite-list]

Hi Bob,



I agree that some people are burned by the cold. But after reading many first 
hand reports I think that the “cold enough to burn” meteorites are those that 
are found ON the ground. The “too hot to touch” meteorites are the ones that 
have punched through something. I can’t prove it, but my theory fits the scores 
of reports that I have read.



Thanks,



Peter



From: Robert Verish [mailto:bolidecha...@yahoo.com]
Sent: Tuesday, June 28, 2016 4:27 PM
To: Tommy; Tommy via Meteorite-list; Peter Scherff
Cc: Meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof



People that have unknowingly picked up a piece of dry ice with their bare hands 
have sworn that it is burnt their fingers.

Bob

Sent from Yahoo Mail on Android 




On Tue, Jun 28, 2016 at 1:22 PM, Tommy via Meteorite-list

 wrote:

  Hi Peter!
I get the friction part but THAT much friction?

Tom


On 06/28/2016 04:09 PM, Peter Scherff wrote:
> Hi Tom,
>
> I believe that part i.e. "I picked up the largest chunk and let go quickly
> as it was very hot,". Have you ever held a nail that you just pulled out of
> a board? The nail is very warm. The friction of punching a hole through a
> home, car or the ground can heat up a meteorite. Now if they start talking
> about the fires it started I am with you.
>
> Thanks,
>
> Peter
>
> -Original Message-
> From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com 
>  ] On
> Behalf Of Tommy via Meteorite-list
> Sent: Tuesday, June 28, 2016 4:03 PM
> To: meteorite-list@meteoritecentral.com 
> Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof
>
> "I picked up the largest chunk and let go quickly as it was very hot,"
> 65-year-old home-owner Bualom Chalomprai said. "
>
>
> Her mind must have been playing tricks on her.
>
> Regards!
>
> Tom
>
>
> On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:
>
> __
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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Robert Verish via Meteorite-list]

People that have unknowingly picked up a piece of dry ice with their bare hands 
have sworn that it is burnt their fingers. Bob

Sent from Yahoo Mail on Android 
 
  On Tue, Jun 28, 2016 at 1:22 PM, Tommy via 
Meteorite-list wrote:     Hi Peter!
    I get the friction part but THAT much friction?

Tom


On 06/28/2016 04:09 PM, Peter Scherff wrote:
> Hi Tom,
>
> I believe that part i.e. "I picked up the largest chunk and let go quickly
> as it was very hot,". Have you ever held a nail that you just pulled out of
> a board? The nail is very warm. The friction of punching a hole through a
> home, car or the ground can heat up a meteorite. Now if they start talking
> about the fires it started I am with you.
>
> Thanks,
>
> Peter
>
> -Original Message-
> From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On
> Behalf Of Tommy via Meteorite-list
> Sent: Tuesday, June 28, 2016 4:03 PM
> To: meteorite-list@meteoritecentral.com
> Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof
>
> "I picked up the largest chunk and let go quickly as it was very hot,"
> 65-year-old home-owner Bualom Chalomprai said. "
>
>
> Her mind must have been playing tricks on her.
>
> Regards!
>
> Tom
>
>
> On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:
>
> __
>
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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Chris Peterson via Meteorite-list]

There's really no way for such a stone to be heated significantly by the 
energy dissipated when crashing through a roof.


In all likelihood, the reason that observed falls are reported as hot is 
because people expect hot, and confuse hot with cold. I don't think the 
incidence of reports of heat is significantly higher for hammers than 
for other falls.


FWIW, when you pull a nail the mass of the nail is very small, it has a 
high surface area compared with its volume, it's thermally conductive, 
the extraction is relatively slow, and the friction is very high. 
Contrast that with a meteorite: much smaller surface area compared with 
volume, low thermal conductivity, very high speed of impact, and very 
little friction (with most of the surface never even contacting the roof).


Chris

***
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

On 6/28/2016 2:29 PM, Peter Scherff via Meteorite-list wrote:

Hi Tom,

Yes, I think so. There are too many reports of meteorites being hot to the
touch. Those reports are almost always about meteorites that have punched
through something (building, vehicle or ground). I trust this mass of
anecdotal evidence. But we won't know for sure until some starts shooting
rocks through buildings for their doctoral thesis.

Thanks,

Peter

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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Peter Scherff via Meteorite-list]

Hi Tom,

You could very well be right. 

Thanks,

Peter

-Original Message-
From: Tommy [mailto:tomm...@hvc.rr.com] 
Sent: Tuesday, June 28, 2016 4:49 PM
To: Peter Scherff
Cc: Meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

Peter,
I'm going to go with the theory she was mistaken. I'm sure the crash
kind of messed her mind up a tad at the time of impact.

Regards!

Tom


On 06/28/2016 04:29 PM, Peter Scherff wrote:
> Hi Tom,
>
> Yes, I think so. There are too many reports of meteorites being hot to 
> the touch. Those reports are almost always about meteorites that have 
> punched through something (building, vehicle or ground). I trust this 
> mass of anecdotal evidence. But we won't know for sure until some 
> starts shooting rocks through buildings for their doctoral thesis.
>
> Thanks,
>
> Peter
>
> -Original Message-
> From: Tommy [mailto:tomm...@hvc.rr.com]
> Sent: Tuesday, June 28, 2016 4:22 PM
> To: Peter Scherff
> Cc: Meteorite-list@meteoritecentral.com
> Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House 
> Roof
>
>Hi Peter!
>   I get the friction part but THAT much friction?
>
> Tom
>
>
> On 06/28/2016 04:09 PM, Peter Scherff wrote:
>> Hi Tom,
>>
>> I believe that part i.e. "I picked up the largest chunk and let go 
>> quickly as it was very hot,". Have you ever held a nail that you just 
>> pulled out of a board? The nail is very warm. The friction of 
>> punching a hole through a home, car or the ground can heat up a 
>> meteorite. Now if they start talking about the fires it started I am with
you.
>>
>> Thanks,
>>
>> Peter
>>
>> -Original Message-
>> From: Meteorite-list
>> [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of 
>> Tommy via Meteorite-list
>> Sent: Tuesday, June 28, 2016 4:03 PM
>> To: meteorite-list@meteoritecentral.com
>> Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand 
>> House Roof
>>
>> "I picked up the largest chunk and let go quickly as it was very hot,"
>> 65-year-old home-owner Bualom Chalomprai said. "
>>
>>
>> Her mind must have been playing tricks on her.
>>
>> Regards!
>>
>> Tom
>>
>>
>> On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:
>>
>> __
>>
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>> the Archives at http://www.meteorite-list-archives.com
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>
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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Tommy via Meteorite-list]

Peter,
   I'm going to go with the theory she was mistaken. I'm sure the crash 
kind of messed her mind up a tad at the time of impact.


Regards!

Tom


On 06/28/2016 04:29 PM, Peter Scherff wrote:

Hi Tom,

Yes, I think so. There are too many reports of meteorites being hot to the
touch. Those reports are almost always about meteorites that have punched
through something (building, vehicle or ground). I trust this mass of
anecdotal evidence. But we won't know for sure until some starts shooting
rocks through buildings for their doctoral thesis.

Thanks,

Peter

-Original Message-
From: Tommy [mailto:tomm...@hvc.rr.com]
Sent: Tuesday, June 28, 2016 4:22 PM
To: Peter Scherff
Cc: Meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

   Hi Peter!
  I get the friction part but THAT much friction?

Tom


On 06/28/2016 04:09 PM, Peter Scherff wrote:

Hi Tom,

I believe that part i.e. "I picked up the largest chunk and let go
quickly as it was very hot,". Have you ever held a nail that you just
pulled out of a board? The nail is very warm. The friction of punching
a hole through a home, car or the ground can heat up a meteorite. Now
if they start talking about the fires it started I am with you.

Thanks,

Peter

-Original Message-
From: Meteorite-list
[mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of
Tommy via Meteorite-list
Sent: Tuesday, June 28, 2016 4:03 PM
To: meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House
Roof

"I picked up the largest chunk and let go quickly as it was very hot,"
65-year-old home-owner Bualom Chalomprai said. "


Her mind must have been playing tricks on her.

Regards!

Tom


On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:

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[meteorite-list] Meteorite temperature (again)

[Matson, Rob D. via Meteorite-list]

If the meteorite had a temperature significantly different from ambient, I'd go 
with
extremely cold (e.g. -30 F). To the unsuspecting, bitter cold could be 
misinterpreted
as very hot. If you don't believe me, try putting a clothes iron in the freezer 
for a
couple hours and then surprise someone (unaware of your setup) by touching the
iron to their arm.  --Rob

-Original Message-
From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On 
Behalf Of Tommy via Meteorite-list
Sent: Tuesday, June 28, 2016 1:22 PM
To: Peter Scherff
Cc: Meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

  Hi Peter!
 I get the friction part but THAT much friction?

Tom


On 06/28/2016 04:09 PM, Peter Scherff wrote:
> Hi Tom,
>
> I believe that part i.e. "I picked up the largest chunk and let go 
> quickly as it was very hot,". Have you ever held a nail that you just 
> pulled out of a board? The nail is very warm. The friction of punching 
> a hole through a home, car or the ground can heat up a meteorite. Now 
> if they start talking about the fires it started I am with you.
>
> Thanks,
>
> Peter
>
> -Original Message-
> From: Meteorite-list 
> [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of 
> Tommy via Meteorite-list
> Sent: Tuesday, June 28, 2016 4:03 PM
> To: meteorite-list@meteoritecentral.com
> Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House 
> Roof
>
> "I picked up the largest chunk and let go quickly as it was very hot,"
> 65-year-old home-owner Bualom Chalomprai said. "
>
>
> Her mind must have been playing tricks on her.
>
> Regards!
>
> Tom
>
>
> On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:
>
> __
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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Peter Scherff via Meteorite-list]

Hi Tom,

Yes, I think so. There are too many reports of meteorites being hot to the
touch. Those reports are almost always about meteorites that have punched
through something (building, vehicle or ground). I trust this mass of
anecdotal evidence. But we won't know for sure until some starts shooting
rocks through buildings for their doctoral thesis. 

Thanks,

Peter

-Original Message-
From: Tommy [mailto:tomm...@hvc.rr.com] 
Sent: Tuesday, June 28, 2016 4:22 PM
To: Peter Scherff
Cc: Meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

  Hi Peter!
 I get the friction part but THAT much friction?

Tom


On 06/28/2016 04:09 PM, Peter Scherff wrote:
> Hi Tom,
>
> I believe that part i.e. "I picked up the largest chunk and let go 
> quickly as it was very hot,". Have you ever held a nail that you just 
> pulled out of a board? The nail is very warm. The friction of punching 
> a hole through a home, car or the ground can heat up a meteorite. Now 
> if they start talking about the fires it started I am with you.
>
> Thanks,
>
> Peter
>
> -Original Message-
> From: Meteorite-list 
> [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of 
> Tommy via Meteorite-list
> Sent: Tuesday, June 28, 2016 4:03 PM
> To: meteorite-list@meteoritecentral.com
> Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House 
> Roof
>
> "I picked up the largest chunk and let go quickly as it was very hot,"
> 65-year-old home-owner Bualom Chalomprai said. "
>
>
> Her mind must have been playing tricks on her.
>
> Regards!
>
> Tom
>
>
> On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:
>
> __
>
> Visit our Facebook page https://www.facebook.com/meteoritecentral and 
> the Archives at http://www.meteorite-list-archives.com
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> Meteorite-list@meteoritecentral.com
> https://pairlist3.pair.net/mailman/listinfo/meteorite-list
>
>
> ---
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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Tommy via Meteorite-list]

 Hi Peter!
I get the friction part but THAT much friction?

Tom


On 06/28/2016 04:09 PM, Peter Scherff wrote:

Hi Tom,

I believe that part i.e. "I picked up the largest chunk and let go quickly
as it was very hot,". Have you ever held a nail that you just pulled out of
a board? The nail is very warm. The friction of punching a hole through a
home, car or the ground can heat up a meteorite. Now if they start talking
about the fires it started I am with you.

Thanks,

Peter

-Original Message-
From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On
Behalf Of Tommy via Meteorite-list
Sent: Tuesday, June 28, 2016 4:03 PM
To: meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

"I picked up the largest chunk and let go quickly as it was very hot,"
65-year-old home-owner Bualom Chalomprai said. "


Her mind must have been playing tricks on her.

Regards!

Tom


On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:

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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Peter Scherff via Meteorite-list]

Hi Tom,

I believe that part i.e. "I picked up the largest chunk and let go quickly
as it was very hot,". Have you ever held a nail that you just pulled out of
a board? The nail is very warm. The friction of punching a hole through a
home, car or the ground can heat up a meteorite. Now if they start talking
about the fires it started I am with you.

Thanks,

Peter

-Original Message-
From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On
Behalf Of Tommy via Meteorite-list
Sent: Tuesday, June 28, 2016 4:03 PM
To: meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

"I picked up the largest chunk and let go quickly as it was very hot," 
65-year-old home-owner Bualom Chalomprai said. "


Her mind must have been playing tricks on her.

Regards!

Tom


On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:

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[meteorite-list] Hammer time in Thailand?!

[Art via Meteorite-list]

2 recent artices:

http://www.slate.com/blogs/bad_astronomy/2016/06/28/small_meteorite_hits_house_in_thailand.html

http://metro.co.uk/2016/06/28/meteorites-smash-into-familys-home-as-theyre-eating-breakfast-5972086/

-Art
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Re: [meteorite-list] Meteorite Crashes Through Thailand House Roof

[Tommy via Meteorite-list]

"I picked up the largest chunk and let go quickly as it was very hot," 
65-year-old home-owner Bualom Chalomprai said. "



Her mind must have been playing tricks on her.

Regards!

Tom


On 06/28/2016 03:02 PM, Ron Baalke via Meteorite-list wrote:

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[meteorite-list] Opal Discovered in Antarctic Meteorite

[Paul via Meteorite-list]

Opal-Studded Meteorite Hints at Origins of Earth's Water
By Nola Taylor Redd, Space.com, June 27, 2016
http://www.space.com/33276-opal-pieces-found-in-antarctica-meteorite.html

New Meteorite Offers Clues About the Origins of Life on
Earth By Sophie Kleeman, Gizmodo, June 7, 2016
http://gizmodo.com/this-opal-studded-meteorite-offers-clues-about-the-orig-1782682303

Opal discovered in Antarctic meteorite
Royal Astronomical Society (RAS), June 27, 2016
https://www.sciencedaily.com/releases/2016/06/160627095939.htm
https://www.ras.org.uk/news-and-press/2873-opal-discovered-in-antarctic-meteorite
https://nam2016.org/press-releases/84-opal-discovered-in-antarctic-meteorite-ras-pr-16-31-nam-5-embargoed

Oxygen Isotopes and Origin of Opal in an Antarctic Ureilite
by Downes H. Beard A. D. Franchi I. A. Greenwood R. C.
79th Annual Meeting of the Meteoritical Society (2016) [#6141]
http://www.hou.usra.edu/meetings/metsoc2016/pdf/6141.pdf
http://karmaka.de/?p=9173

Yours,

Paul H.

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[meteorite-list] for Asteroid Day!: Space Drafts Asteroids Night June 29

[Dolores Hill via Meteorite-list]

Greetings Asteroid and Meteorite Aficionados!

Celebrate *Asteroid**Day* with "Space Drafts/Astronomy on Tap" at 
Borderlands Brewery (119 E. Toole Ave.) in Tucson, Arizona, June 29th at 
7:30 pm! This interesting set of free talks will celebrate*asteroid 
facts and exploration*!


Join Dr. Vishnu Reddy (Planetary Sciences Institute) for /Get Rich or 
D//ie: Separating Facts from Fiction about Asteroids a//nd Meteors/ and 
Dani Della Giustina (OSIRIS-REx Image Processing Working Group Lead) for 
/Insider's Scoop: the OSIRIS-REx Mission to Sample an Asteroid./



Hope to see you there!
Dolores Hill



_Here is more information from the organizers:_
Come a few minutes early to grab your pizza+beer and reserve a chair. 
Try your chance at trivia during the talks to win astro-themed prizes!


Space Drafts is free and open to all ages (of humans and dogs alike).
Space Drafts is sponsored by Empire Pizza, and you can order by the 
slice -- any pizza revenue/tips will go to the joint LPL/Steward 
outreach fund! Space Drafts t-shirts designed by James Keane will also 
be for sale.


If you are on Facebook, please let us know if you are planning on 
attending (www.facebook.com/events/186989788362570/) to help us plan for 
pizza. You are also welcome to bring your own food.


You can follow current space news, and future events on our Facebook 
page: https://www.facebook.com/SpaceDrafts, Wordpress: 
http://astronomyontap.org/locations/tucson-az/ or on twitter at 
@Space_Drafts





--
Dolores H. Hill
Sr. Research Specialist
Lunar & Planetary Laboratory
Kuiper Space Sciences Bldg. #92
The University of Arizona
1629 E. University Blvd.
Tucson, AZ 85721
http://www.lpl.arizona.edu/

OSIRIS-REx Asteroid Sample Return Mission Communication & Public Engagement Team
Lead OSIRIS-REx Ambassadors program
Co-lead OSIRIS-REx Target Asteroids! citizen science program
Co-coordinator Target NEOs! observing program of the Astronomical League

http://osiris-rex.lpl.arizona.edu/
http://osiris-rex.lpl.arizona.edu/?q=target_asteroids
http://www.astroleague.org/files/u3/NEO_HomePage.pdf

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[meteorite-list] AD: Meteorite Collection For Sale

[Meteorite World via Meteorite-list]

Meteorite collection for sale. Selling my meteorite collection and a few dealer 
lots. Photos and pricing on the page.
http://meteoriteworld.com/meteorites-for-sale/ 


180g Seymchan Slice
20.7g Camel Donga
23g Glorieta Iron Sculpted Individual w/HOLE
3g Martian Meteorite NWA 7397 Frags
420g Franconia
933g NWA 869 individuals
Agoudal Meteorite 700g+ Lot of small irons

Regards,
Eric




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Re: [meteorite-list] From the dailybruin.com - Couple loans unexpected find to UCLA Meteorite Gallery

[Graham Ensor via Meteorite-list]

What an amazing oriented shape...awesome find and great that it will be
exhibited.

Graham

On Mon, Jun 27, 2016 at 6:21 PM, Jason Utas via Meteorite-list <
meteorite-list@meteoritecentral.com> wrote:

> Some additional photos:
>
> (1) http://meteoritegallery.com/wp-content/uploads/2016/05/DSCN8994.jpg
>
> (2) http://meteoritegallery.com/wp-content/uploads/2016/05/DSCN8992.jpg
>
> (3) http://meteoritegallery.com/wp-content/uploads/2016/05/DSCN8991.jpg
>
> (4) http://meteoritegallery.com/wp-content/uploads/2016/05/DSCN8990.jpg
>
>
> As it is currently displayed (through glass):
>
> (L) http://meteoritegallery.com/wp-content/uploads/2016/05/IMG_2949.jpg
>
> (R) http://meteoritegallery.com/wp-content/uploads/2016/05/IMG_2950.jpg
>
>
> Jason
>
> On Mon, Jun 27, 2016 at 8:47 AM, Art via Meteorite-list <
> meteorite-list@meteoritecentral.com> wrote:
>
>> Great news for UCLA ... Marvin, John, Nick, and Jason mentioned in this
>> article about the Eltrich's awesome find.
>>
>>
>> http://dailybruin.com/2016/06/27/couple-loans-unexpected-find-to-ucla-meteorite-gallery/
>>
>> -Art
>>
>> __
>>
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>> the Archives at http://www.meteorite-list-archives.com
>> Meteorite-list mailing list
>> Meteorite-list@meteoritecentral.com
>> https://pairlist3.pair.net/mailman/listinfo/meteorite-list
>>
>>
>
> __
>
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> Archives at http://www.meteorite-list-archives.com
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>
>
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[meteorite-list] Curiosity Rover Findings Point to a More Earth-like Martian Past

[Ron Baalke via Meteorite-list]

http://www.jpl.nasa.gov/news/news.php?feature=6544

NASA Rover Findings Point to a More Earth-like Martian Past
Jet Propulsion Laboratory
June 27, 2016

Chemicals found in Martian rocks by NASA's Curiosity Mars rover suggest 
the Red Planet once had more oxygen in its atmosphere than it does now.

Researchers found high levels of manganese oxides by using a laser-firing 
instrument on the rover. This hint of more oxygen in Mars' early atmosphere 
adds to other Curiosity findings -- such as evidence about ancient lakes 
-- revealing how Earth-like our neighboring planet once was.

This research also adds important context to other clues about atmospheric 
oxygen in Mars' past. The manganese oxides were found in mineral veins 
within a geological setting the Curiosity mission has placed in a timeline 
of ancient environmental conditions. From that context, the higher oxygen 
level can be linked to a time when groundwater was present in the rover's 
Gale Crater study area.

"The only ways on Earth that we know how to make these manganese materials 
involve atmospheric oxygen or microbes," said Nina Lanza, a planetary 
scientist at Los Alamos National Laboratory in New Mexico. "Now we're 
seeing manganese oxides on Mars, and we're wondering how the heck these 
could have formed?"

Microbes seem far-fetched at this point, but the other alternative -- 
that the Martian atmosphere contained more oxygen in the past than it 
does now -- seems possible, Lanza said. "These high manganese materials 
can't form without lots of liquid water and strongly oxidizing conditions. 
Here on Earth, we had lots of water but no widespread deposits of manganese 
oxides until after the oxygen levels in our atmosphere rose."

Lanza is the lead author of a new report about the Martian manganese oxides 
in the American Geophysical Union's Geophysical Research Letters. She 
uses Curiosity's Chemistry and Camera (ChemCam) instrument, which fires 
laser pulses from atop the rover's mast and observes the spectrum of resulting 
flashes of plasma to assess targets' chemical makeup.

In Earth's geological record, the appearance of high concentrations of 
manganese oxide minerals is an important marker of a major shift in our 
atmosphere's composition, from relatively low oxygen abundances to the 
oxygen-rich atmosphere we see today. The presence of the same types of 
materials on Mars suggests that oxygen levels rose there, too, before 
declining to their present values. If that's the case, how was that oxygen-rich 
environment formed?

"One potential way that oxygen could have gotten into the Martian atmosphere 
is from the breakdown of water when Mars was losing its magnetic field," 
said Lanza. "It's thought that at this time in Mars' history, water was 
much more abundant." Yet without a protective magnetic field to shield 
the surface, ionizing radiation started splitting water molecules into 
hydrogen and oxygen. Because of Mars' relatively low gravity, the planet 
wasn't able to hold onto the very light hydrogen atoms, but the heavier 
oxygen atoms remained behind. Much of this oxygen went into rocks, leading 
to the rusty red dust that covers the surface today. While Mars' famous 
red iron oxides require only a mildly oxidizing environment to form, manganese 
oxides require a strongly oxidizing environment, more so than previously 
known for Mars.

Lanza added, "It's hard to confirm whether this scenario for Martian 
atmospheric 
oxygen actually occurred. But it's important to note that this idea represents 
a departure in our understanding for how planetary atmospheres might become 
oxygenated." Abundant atmospheric oxygen has been treated as a so-called 
biosignature, or a sign of extant life, but this process does not require 
life.

Curiosity has been investigating sites in Gale Crater since 2012. The 
high-manganese materials it found are in mineral-filled cracks in sandstones 
in the "Kimberley" region of the crater. But that's not the only place 
on Mars where high manganese abundances have been found. NASA's Opportunity 
rover, exploring Mars since 2004, also recently discovered high manganese 
deposits thousands of miles from Curiosity. This supports the idea that 
the conditions needed to form these materials were present well beyond 
Gale Crater.

Los Alamos National Laboratory leads the U.S. and French team that jointly 
developed and operates ChemCam. NASA's Jet Propulsion Laboratory, a division 
of Caltech in Pasadena, California, built the rover and manages the Curiosity 
mission for NASA's Science Mission Directorate, Washington.


News Media Contact

Guy Webster 
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-6278
guy.webs...@jpl.nasa.gov

Laura Mullane
Los Alamos National Laboratory, Los Alamos, N.M.
505-667-6012
mull...@lanl.gov 

2016-161

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[meteorite-list] Meteorite Crashes Through Thailand House Roof

[Ron Baalke via Meteorite-list]

http://www.bangkokpost.com/news/general/1022213/meteorite-crashes-through-phitsanulok-house-roof

'Meteorite' crashes through Phitsanulok house roof 
Bangkok Post
28 Jun 2016  

PHITSANULOK - A mysterious rock, believed to be a meteorite, crashed through 
the roof of a house in Phitsanulok's Muang district on Tuesday. 

The suspected meteorite fell through the roof of a home in Plai Chumphon 
sub-district at 7.26am, hit a wall and then bounced to the floor, breaking 
into five pieces.

"I was having breakfast when there was a loud bang, like a gunshot sound. 
I looked around and found a rock about the size of an egg and some fragments 
nearby. I picked up the largest chunk and let go quickly as it was very 
hot," 65-year-old home-owner Bualom Chalomprai said. 

Mrs Bualom believes the rock is from outer space and will bring her good 
luck. 

Mrs Bualom's husband, Kittisak, 75, said he heard a sound of explosion 
in the sky at about 7am before the 300g rock fell through his roof. 

Media reports said residents in adjacent districts of Nakhon Thai and 
Chat Trakan also heard the "explosion". 

Scientists at Naresuan University's department of physics later carried 
out an initial examination on a small fragment taken from the Chalomprai 
family home and concluded the object could very likely be a meteorite 
given its features and the circumstance under which it had been found. 


Department head Sarawut Tuantam said the rock's crust was charcoal black, 
indicating it had been burned entering Earth's atmosphere at very high 
speeds. The test also found the chunk contained large amount of iron and 
was attracted by a magnet. 

Prof Sarawut added that the Chalomprais could keep the suspected space 
rock as it had safe radioactivity levels. 

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[meteorite-list] AD -Auctions Ending - Check Out The Monolith

[Raremeteorites via Meteorite-list]

Dear List Members,

Be sure to check out some auctions I have ending this evening. Remember that 
brown crust on lunar meteorites is considered normal due to the lack of iron 
and is not an indication of weathering.   NWA 482 is a good example of this 
if you want compare the top-rated NWA 5000 to other lunar meteorites.


I am accepting direct offers on the Legendary 3D MONOLITH SLICE!

Legendary NWA 5000 Lunar Meteorite Moon Rock 81.8 grams - THE MONOLITH
SLICE! http://r.ebay.com/nt3uyk

Link to all auctions:
http://www.ebay.com/sch/merchant/ancientechoesartifacts

NWA 5000 Lunar Specimens - NO RESERVE - MUST SEE:

Legendary NWA 5000 Lunar Meteorite Moon Rock .826 grams - CRUSTED!
http://r.ebay.com/NnVdT6

Legendary NWA 5000 Lunar Meteorite Moon Rock .526 grams - LAYERED LITHOLOGY!
http://r.ebay.com/SCouBr

Legendary NWA 5000 Lunar Meteorite Moon Rock .460 grams - SOLID CRUST!
http://r.ebay.com/utIHUx

Legendary NWA 5000 Lunar Meteorite Moon Rock .332 grams - GREAT LOT!
http://r.ebay.com/uXry5y

Legendary NWA 5000 Lunar Meteorite Moon Rock 1.0 grams Pure Dust
http://r.ebay.com/W5smor













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[meteorite-list] Today in science: Egypt’s first meteorite

[Tommy via Meteorite-list]

http://earthsky.org/space/today-in-science-egypts-nakhla-meteorite

Regards!

Tom

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[meteorite-list] Meteorite Picture of the Day

[Paul Swartz via Meteorite-list]

Today's Meteorite Picture of the Day: Sariçiçek

Contributed by: Jean-Michel Masson

http://www.tucsonmeteorites.com/mpodmain.asp?DD=06/28/2016
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