Re: [meteorite-list] Destruction of the Hopewell civilization

Anne: I was aware of this article, but thanks for the quote from it. So comets have enough metal to make tools. I guess I have been wrong all these years! Larry Lebofsky On Thu, Sep 28, 2023, 7:22 AM Anne Black via Meteorite-list < meteorite-list@meteoritecentral.com> wrote: > Hello, > > This

Re: [meteorite-list] Giant Impact Crater Might Be Hidden Under Greenland Icesheet

>From the pictures in the Space.com article, the meteorite that is referenced in article is probably the Cape Your Iron. Larry Lebofsky > This is interesting. :-) > > Scientists Spot What May Be a Giant Impact Crater > Hidden Under Greenland Ice By Meghan Bartels, > Space.com, November 14, 2018

Re: [meteorite-list] More on meteorite temperature

Hi Rob: Did you remember an object is only illuminated by the Sun half the time? Larry > Hi All, > > Playing Devil's Advocate, I decided to try coming up with a scenario that > attempts to maximize the > thermal equilibrium temperature of a chondritic meteoroid just prior to > encountering the

Re: [meteorite-list] Lunar Lava Tubes Could Protect Astronauts

Sterling and Paul: There were also two conferences (at least) on lunar habitats that discussed the existence and use of lava tubes that were held in 1986 and 1988 (we were "designing" these in our education workshops in the early 90s). Heinlein wrote several books about underground lunar habitats

[meteorite-list] Craters with meteorites

Hi Everyone: I am trying to compile a list of craters that have meteorites associated with them. Of the 188 impact craters that have been identified, how many have associated meteorites? Thanks Larry Lebofsky __ Visit our Facebook page

Re: [meteorite-list] Caltech Researchers Find Evidence of a Real Ninth Planet

Everyone: At the time that Pluto was being "reclassified," Hal Levinson from SWRI produced a figure that shows the mass that is need to "clear one's orbit" at any given distance from the Sun. This can be due to either accretion or scattering of objects. At Pluto's distance of 40 AU, an

Re: [meteorite-list] Meteorite or Space related license plates

Hello Ruben: 1 Ceres. That was how we met David Levy who saw our car on the road and made us pull over so that he could introduce himself (several years before Comet Shoemaker Levy 9). He wanted to make sure that we submitted a picture for an article that was coming out in Sky and Telescope.

[meteorite-list] Fireball over Florida Nov. 10

Hello everyone: A few days ago, I received a question from a friend of mine in Florida. His all-sky camera had picked up a -18 magnitude fireball on Nov. 10 and he was wondering how that translates to the size of the object that produced it. I told him that velocity was a major factor, but would

Re: [meteorite-list] Ceres' Bright Spots Seen in Striking New Detail

Hello from the VATT (cloudy, unfortunately). The problem with mineral identification is that the spectrometer is not able to do very high surface resolution spectra. I think this is related to the loss of one or two of the reaction wheels, so they are limited to more global spectra and thus

Re: [meteorite-list] NASA mission provides closest ever look at dwarf planet Ceres

Hi Shawn: The short answer is, unfortunately, probably not. Ceres generally looks similar (but not a match) to CIs and CMs (clay minerals). This we have known for many years. However, there also seems to be brucite (magnesium hydroxide) which is an indication of low temperature hydrothermal

Re: [meteorite-list] Ceres and Meteorites?

Hi Mike: Two short answers: 1. Closest to the CI chondrites 2. Probably no meteorites from Ceres: nothing looks quite like it and I think it is not near a resonance that would easily ship chunks of Ceres to Earth (unlike Vesta). Larry Hi List, Has Ceres ever been connected to any type of

Re: [meteorite-list] Meteorite Strikes Down Thief During Armed Robbery

I used to use their articles in my class and at teacher workshops: WWII bomber found in a lunar crater (the plane was about the size of the 100 km diameter crater) I did a teacher workshop about observing the Moon and told them that this would be their last chance to observe the Moon with their

Re: [meteorite-list] Meteorite Strikes Down Thief During Armed Robbery

Ed I used to be an editor and need to correct your last sentence. A few letters missing and a grammar correction. Photos don't lie should have been Photoshop doesn't lie. Larry Paul, most of what The Weekly World News is fabricated, tongue-in-cheek humor. I used to read the front page

Re: [meteorite-list] Dawn Captures Sharper Images of Ceres

Graham: I am amazed by how cratered (old) the surface looks. I am still personally very interested in how bright the whitish areas actually are. Icy? Larry Wonderful!...now seeing good detail...can't wait for a closer look and the data analysis. Graham On Tue, Feb 17, 2015 at 4:44 PM,

Re: [meteorite-list] Dawn Captures Sharper Images of Ceres

Hi Graham: The average albedo of Ceres is about 0.09, i.e., it reflects 9% of the light. Sort of gray. This is from telescopic observations, not Dawn. I think that makes it at least 50% more reflective than Comet 67P/Churyumov–Gerasimenko. Most dark asteroids have albedos of about 0.05. The best

Re: [meteorite-list] NEO Asteroids Close Approach Data 2000-2014 Graphs and Analysis 10 LD - 0.1 LD

It rains in Tucson in the summer! A great example of observational bias. Larry List, Some of you may find this information very interesting! NEO Asteroids Close Approach Data 2000-2014 Graphs and Analysis 10 LD - 0.1 LD ©2015 23.1.15- ANALYSIS by ESSICO / LUNAR METEORITE HUNTER Source

Re: [meteorite-list] 8,416 Newly Discovered NEOs Since 01JAN2015!

Dirk This is the TOTAL number of all asteroids that have been observed, not just NEOs. Larry List, Some incoming perhaps mostly not. WOW! 8,461 NEOs Discovered Since 01JAN2015 http://lunarmeteoritehunters.blogspot.jp/2015/01/high-number-of-recently-discovered-neo.html Thank you to the

Re: [meteorite-list] Vesta

Here is the abstract to the original paper published in Science in 1970. Asteroid vesta: spectral reflectivity and compositional implications. McCord TB, Adams JB, Johnson TV. Abstract The spectral reflectivity (0.30 to 1.10 microns) of several asteroids has been measured for the first time.

Re: [meteorite-list] Science Journal: Earth's water didn't come from comets, scientists now say

Hi Kelly: Thanks for posting this. I have not read the original article, but I assume that when they present measurements from asteroids, this is really measurements from meteorites which came from asteroids. Larry hi, Michael... I am curious how such a definitive conclusion can be reached

Re: [meteorite-list] Still Arguing About Pluto

And the Sun is a dwarf star, Sterling. Larry List, The argument about Pluto The Planet or Pluto The Small Body continues: http://www.travelerstoday.com/articles/12524/20141002/pluto-planet-again-sta tus-2014-still-undecided-astronomy-debate-ongoing.htm The Harvard-Smithsonian Center

Re: [meteorite-list] Meteorite Sculpture Will Be International Space Station’s First Artwork

Hi Art: But not the first meteorite to be brought back to space from the Earth. If I remember correctly, about 20 years ago (do not remember which mission) Tom Jones brought a meteorite (do not remember what it was) up in the Shuttle. It may have been the same flight that he brought a Zuni Fetish

Re: [meteorite-list] Chelyabinsk Meteorite Sheds Light on Dinosaur Extinction Mystery

Hi Mike: That is not what the press release says. It is still thought that the KT impactor was carbonaceous. There was also thought, based on being dark and formation age of the BAF (when the parent body was disrupted), that the BAF was the source of the KT impactor. However, there is a better

[meteorite-list] Meteorite found in Croatia seven years ago, question

Hi all We were just told about a meteorite that was found in a park in Croatia back in 2008 or 2009. Does anyone know the name of it and where it is now? Thanks Larry Lebofsky __ Visit the Archives at http://www.meteorite-list-archives.com