Meteor!

ardeegee · 04-15-2010, 05:03 PM

Speaking of science in the USA, I thought I'd make a thread related to the big fireball/bolide seen over the US last night:

This looks like a very good candidate for having rocks on the ground. Some recent falls have been helped to be pinpointed by Doppler radar images-- which can pick up falling debris as well is it can pick up rain, hail, snow, or sleet, and this one has a Doppler hit:

http://www.crh.noaa.gov/news/display...50881&source=0

http://addins.wrex.com/blogs/weather...ppler_348a.gif

Only large meteoroids reach the ground with any trace of their cosmic velocity-- when the fireball in that video faded away, it was still miles above the ground, only having slowed to a standstill and stopped ablating. Any remaining pieces spend minutes more in a "dark fall" at the mere few hundred miles per hour of the terminal velocity of any dropped object. The remains (if there are remains) will be found (if they are found) miles downwind from where the last glow was seen above, in a wind-influenced ellipse known as a strewnfield.

As I type, there are likely meteorite researchers, dealers, and collectors from around the country and around the world heading towards Livingston, WI to comb the ground.

BTW, the most recent fall that arrived with cosmic velocity intact-- and caused a crater-- was Carancas and there is still scientific debate over just what conditions allowed for the very unusual nature of the event.

Other interesting recent meteorite falls include West, TX:

http://www.rocksfromspace.org/WTM.html

and Buzzard Coulee, Canada:

http://www.aerolite.org/expeditions/bc/01.htm

And, well-- these.

Think that you've found a meteorite? Most likely, you haven't.

ardeegee · 04-16-2010, 12:54 AM

And, the first meteorite has been found!

http://www.rocksfromspace.org/April_...rite_fall.html

dsvick · 04-16-2010, 08:24 AM

On a slightly related note, you can check here to see when you might get a chance to get some good samples, and also to see just how close we all came (or will come) to being obliterated

http://neo.jpl.nasa.gov/ca/

ardeegee · 04-18-2010, 09:08 PM

Looks like others lack others lack my fascination with the detective work in tracking down new falls, but FWIW, some of the latest pieces:

http://www.rocksfromspace.org/April_18_2010.html

Donnageddon · 04-18-2010, 10:42 PM

Quote:

Originally Posted by ardeegee

Looks like others lack others lack my fascination with the detective work in tracking down new falls, but FWIW, some of the latest pieces:

http://www.rocksfromspace.org/April_18_2010.html

Well at least Steve Arnold of MeteorMen found one. Cool!

ardeegee · 04-19-2010, 01:28 PM

A couple of more videos:

http://www.channel3000.com/localvide...x.html?v=28302

http://www.youtube.com/watch?v=jbPW-7ji3so

One of these is real-- one of them isn't. Can you catch the fake?

04-15-2010, 05:03 PM	#1
ardeegee Maratus speciosus butt Posts: 3,292 Karma: 1162698 Join Date: Sep 2009 Device: PRS-350	Meteor! Speaking of science in the USA, I thought I'd make a thread related to the big fireball/bolide seen over the US last night: This looks like a very good candidate for having rocks on the ground. Some recent falls have been helped to be pinpointed by Doppler radar images-- which can pick up falling debris as well is it can pick up rain, hail, snow, or sleet, and this one has a Doppler hit: http://www.crh.noaa.gov/news/display...50881&source=0 http://addins.wrex.com/blogs/weather...ppler_348a.gif Only large meteoroids reach the ground with any trace of their cosmic velocity-- when the fireball in that video faded away, it was still miles above the ground, only having slowed to a standstill and stopped ablating. Any remaining pieces spend minutes more in a "dark fall" at the mere few hundred miles per hour of the terminal velocity of any dropped object. The remains (if there are remains) will be found (if they are found) miles downwind from where the last glow was seen above, in a wind-influenced ellipse known as a strewnfield. As I type, there are likely meteorite researchers, dealers, and collectors from around the country and around the world heading towards Livingston, WI to comb the ground. BTW, the most recent fall that arrived with cosmic velocity intact-- and caused a crater-- was Carancas and there is still scientific debate over just what conditions allowed for the very unusual nature of the event. Other interesting recent meteorite falls include West, TX: http://www.rocksfromspace.org/WTM.html and Buzzard Coulee, Canada: http://www.aerolite.org/expeditions/bc/01.htm And, well-- these. Think that you've found a meteorite? Most likely, you haven't.

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04-16-2010, 12:54 AM	#2
ardeegee Maratus speciosus butt Posts: 3,292 Karma: 1162698 Join Date: Sep 2009 Device: PRS-350	And, the first meteorite has been found! http://www.rocksfromspace.org/April_...rite_fall.html

04-16-2010, 08:24 AM	#3
dsvick Wizard Posts: 2,737 Karma: 635747 Join Date: Nov 2009 Location: Northeast Ohio, USA Device: PRS-900	On a slightly related note, you can check here to see when you might get a chance to get some good samples, and also to see just how close we all came (or will come) to being obliterated http://neo.jpl.nasa.gov/ca/

04-18-2010, 09:08 PM	#4
ardeegee Maratus speciosus butt Posts: 3,292 Karma: 1162698 Join Date: Sep 2009 Device: PRS-350	Looks like others lack others lack my fascination with the detective work in tracking down new falls, but FWIW, some of the latest pieces: http://www.rocksfromspace.org/April_18_2010.html

04-19-2010, 01:28 PM	#6
ardeegee Maratus speciosus butt Posts: 3,292 Karma: 1162698 Join Date: Sep 2009 Device: PRS-350	A couple of more videos: http://www.channel3000.com/localvide...x.html?v=28302 http://www.youtube.com/watch?v=jbPW-7ji3so One of these is real-- one of them isn't. Can you catch the fake?

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