http://www.sci-news.com/geology/science-asteroid-meteorite-impacts-biodata-01867.html
Asteroid, Meteorite Impacts Can Preserve Biodata for Millions of Years
Sci-News.com
Apr 18, 2014
In two separate studies, geologists led by Dr Haley Sapers from the University
of Western Ontario and Dr Pete
http://siberiantimes.com/science/casestudy/news/n0471-russias-first-static-meteor-observing-station-is-opened-in-siberia/
Russia's First Static Meteor Observing Station is Opened in Siberia
The Siberian Times
28 October 2015
One early visitor: a fireball streaking across the sky and splashing
Rob, Marco,
OK, so color isn't important. But why the different colors? Not green
can't mean no oxygen. Is the green overwhelmed by other colors? Why?
- John
John Kashuba
Bend, Oregon
-Original Message-
From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On
https://news.brown.edu/articles/2015/10/ceres
What smacks into Ceres stays on Ceres
Brown University
Contact: Kevin Stacey 401-863-3766
October 14, 2015
Ceres, the largest object in the asteroid belt and closest dwarf planet
to Earth, had been remarkable for its plain surface. New
Hello List, Ron,
H, is there any chance that terrestrial inclusions may be
preserved in Besednice Moldavite glass?
I never thought to scope it. Are there any studies on this subject?
John
- Original Message -
From: "Ron Baalke via Meteorite-list"
Hi all -
For the last several years, I have been speaking at Serpent Mound:
http://ancientearthworksproject.org/1/post/2014/07/new-radiocarbon-dates-suggest-serpent-mound-is-more-than-2000-years-old.html
Originally and abysmally, this structure was dated by Brad Lepper to the 1066
CE
Meteor color is important. It's just not a very useful measure for
determining composition. Color changes with meteor speed and meteor
depth in the atmosphere. And certainly, the composition is a factor,
both in terms of chemical composition and bulk properties. But the
relationship is
Hi Mike -
I hope I am not spoiling anyone's source here, but
Your go-to guy for Serpent Mound geological specimens is Tom Johnson of the
House of Phacops.
He can also provide local fossils.
IMO, there is a whole lot of BS that is spouted as regards the ceremonial
complex there.
That said,
Different colors because there are different constituents in our atmosphere.
Unless people are recording meteors with a spectrograph reporting
"color" is useless since everyone sees colors differently, and the
human eye is hardly a scientific calibrated device.
Michael in so. Cal.
On Wed, Nov
Hi John,
I think there are definitely things that can be learned by looking at the
spectroscopy
of fireball emissions, but of course such data are rare. And human
eyeballs/brains
are a poor substitute. We don't have the necessary spectral resolution, and of
course
the optical response is far
https://news.brown.edu/articles/2015/10/mound
Mound near lunar south pole formed by unique volcanic process
Brown University
Contact: Kevin Stacey 401-863-3766
October 15, 2015
Within a giant impact basin near the Moon's south pole, there sits a large
mound of mysterious origin. Research
Thanks for the very informative and interesting discussion. Could the altitude,
angle and distance from which a meteor is viewed also affect perceived color?
Seems to me that the air between the fireball and the witness might
significantly filter the colors, in the same way that the sun can
Yes Doug,
I agree with you.
In fact, I witnessed the very scenario you described.
It was a long duration (earth-grazing) fireball that I was lucky enough to
catch early-on in its flight.
While it was at high elevation the fireball was a bright-blue ball with a
greenish coma.
As it
Today's Meteorite Picture of the Day: Murnpeowie
Contributed by: Graham Macleod
http://www.tucsonmeteorites.com/mpodmain.asp?DD=11/05/2015
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MARS RECONNAISSANCE ORBITER HIRISE IMAGES
November 4, 2015
o Meanders in Ridge Form in the Zephyria Region
http://hirise.lpl.arizona.edu/ESP_024695_1745
In this image, an ancient sinuous meandering river system
is surrounded by features called "yardangs."
o Small Channels and
The whole issue of meteor color is complex. We now have many examples of
high resolution meteor spectra... but "color" is a physiological
phenomenon that isn't always easy to relate to physical spectra.
The light of meteors consists mostly of thermally broadened atomic
emission lines- lots of
Marco, Rob...
this discussion is timely. what you've noted is exactly my understanding. just
yesterday I came across a high-profile blog about these fireballs, and the
writer stated that most of the light comes from the superheated vaporized
particle as it ablates. suspecting this was wrong, I
HI All,
Marco took the words out of my mouth. Getting tired of hearing that a green
meteor tells you anything about its composition. I know that it's natural for
people to think the most important thing they can report about a meteor
is its color, but I wish various broadcast media would do the
A lot of folks say it looked green to them, which means it may have been
metallic;
It is a perpetuated misunderstanding that meteor colours are primarily due to
their composition. It's a science myth inspired by High School Bunsen burner
experiments that appears hard to kill.
While
The recent spade of very bright fireballs is due to the Taurid meteor stream by
the way, which every 5-6 years shows enhanced activity of this kind.
- Marco
-
Dr Marco (asteroid 183294) Langbroek
Dutch Meteor Society (DMS)
e-mail: d...@marcolangbroek.nl
http://www.dmsweb.org
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