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  1. A Martian meteorite is a rock that formed on Mars, was ejected from the planet by an impact event, and traversed interplanetary space before landing on Earth as a meteorite. As of September 2020 [update] , 277 meteorites had been classified as Martian, less than half a percent of the 72,000 meteorites that have been classified.

    • Untitled Comment 2
    • ALH84001
    • Determination That Meteorite Is from Mars
    • Page Needs Renaming
    • Number of Specimens
    • Comment on The History Section
    • New Section on Cosmic Radiation Exposure Ages
    • How A Martian Meteorite Can Have Escaped The Martian Gravity field?
    • CK Beauty, The Oldest Known Martian Meteorite Is Older Than 2.1 Billion Years
    • A New Standard For The Minimum Size of A life-form?

    Is there any source for this paragraph? "It should be pointed out, however, that the isotope ratios do not actually match Mars ratios especially well, to the extent that Mars ratios are known..." And this: "Although common wisdom is that the SNC meteorites are from Mars, the Mars origin theory does have some problems. The isotope ratios are not an especially good match. A widely published graph showing a near-perfect match is alleged to be constructed from examples selected to "prove" the hypothesis and to be a poor representation of the real data. For example, the Ar40/Ar36 ratio for one meteorite (1650) is almost exactly half-way between Earth (300) and Mars (3000). Carbon dioxide, the predominant gas in the current Mars atmosphere, is unaccountably rare in the trapped gases in the SNC meteorites. The SNC meteorites do not show shock artifacts that would be expected in small objects ejected with enough velocity to escape Mars. The majority of SNC meteorites are quite young by geol...

    In the article ALH84001 is described as a shergottite, but I don't know of anyone in the planetary science community who would classify it that way. McSween and Treiman [1998] says, "this meteorite does not fit into any of the previously established SNC categories." It should probably be its own category.--Will.i.am21:52, 19 September 2006 (UTC)

    It is not clear to me how this is determined. Could they possibly be from another planet, moon, or other body? Also, has any meteorite from Venus, Mercury, or the moons of Jupiter ever been found? --Eraticus04:20, 21 April 2007 (UTC) They're definitely from Mars - I'll add a section explaining all this. As for your question, there's tonnes of meteorites known from the Moon, and a few (Angrites) that *might* be from Mercury. Venus meteorites should be impossible, and there are no candidates anyway. This page is a bit messy, I'll give it a proper overhaul when I get the time - just finished a master's project on the Shergottites so I've got a reasonable idea what's going on... Ezkerraldean (talk) 13:54, 6 June 2010 (UTC)

    Although there are a few prominent NASA websites that call these objects Mars meteorites, e.g., http://www2.jpl.nasa.gov/snc/ and http://curator.jsc.nasa.gov/antmet/mmc/, the overwhelming usage among scientists is martian meteorites. In the NASA ADS bibliographic website, there are 26 publications listed that use the former term in the title and 636 publications that use the latter. In light of this, there is little doubt about the preferred term, so this page should be renamed. Unless there are reasonable objections that I can't think of, I will rename it. JeffG (talk) 01:21, 7 April 2010 (UTC)

    There is now about 110 specimens according to this article: Meteorite From Mars is Water-Rich. Danrok (talk) 21:06, 3 January 2013 (UTC) 1. The reference given for the 99 number is now showing 114. Perhaps we should update this number (and date), and expect to have to do this again in a few years. Watchwolf49z (talk) 00:37, 9 January 2013 (UTC) 1. 1.1. Done - Would someone please review the edit, I made a few changes to the prose that should be looked at. That dataBase gives the 61,000 number as well. This is really one of the best articles I come across in a while, especially concerning HIGHLY controversial subject material. Well done !!! Watchwolf49z (talk) 15:01, 12 January 2013 (UTC)

    This section states the following, "Then in 1983, various trapped gases were reported in impact-formed glass of the EET79001 shergottite, gases which closely resembled those in the martian atmosphere as analyzed by Viking. These trapped gases provided direct evidence for a martian origin." The last sentence that the trapped gasses provide direct evidence is not true since it cannot be proven merely from the resemblence to the current Martian atmosphere that they (the trapped gasses) actually came from it; especially from an object with an undetermined time of origin. (The article goes on to give speculations about when shergottites were actually formed.) It seems to me that you cannot obtain facts from speculations, no matter how reasonable they might be. This is not to say the meteorites could not have come from Mars, or even that it is unlikely that they have. But, based on what is written in this article, there is still no direct evidence. Skinnerd (talk) 15:59, 8 January 2013 (U...

    I came here looking for this information and didn't find anything, so added a table based on a 2006 book about meteorite exposure ages which has a section on Martian meteorites. It's obviously just a starting point and needs to be updated with the most recent research. Since they all originate apparently from only a few distinct impact events, I feel that it shouldn't be too much overload to the article to have a complete table of all the exposure ages determined so far. Robert Walker (talk) 09:41, 14 July 2013 (UTC)

    Can it be a volcanic object project with a velocy superior to the escape velocity.If no. What else? — Preceding unsigned comment added by 87.231.74.157 (talk) 12:59, 17 October 2013 (UTC) 1. Yes. I would like to know the escape velocity to go from Mars to Earth. --Error (talk) 00:58, 30 July 2018 (UTC)

    News article says it is 4.4 billion years old: http://edition.cnn.com/2013/11/20/tech/innovation/mars-meteorite/ — Preceding unsigned comment added by 141.135.9.205 (talk) 12:03, 22 November 2013 (UTC)

    The evidence for life on martian meteorites has been largely discounted because "the structures are too small to be Earthly bacteria." This is flawed for two reasons: 1. It has already been established that the meteorite is not from Earth. Consequently, what is possible on Earth should not constitute what is possible on Mars. Micropaleontologist Schopf also commented that, "the structures don't look especially like lifeforms to him." This statement should be deleted, as opinions aren't worth much in science. 2. According to an article published in Nature Communications, (6, Article number: 6372) "Diverse uncultivated ultra-small bacterial cells in groundwater", Bacteria from phyla are widespread in natural systems and some have very small genomes. Metagenomic analysis of groundwater that passed through a ~0.2-μm filter reveals a wide diversity of bacteria from the WWE3, OP11 and OD1 candidate phyla. Cryogenic transmission electron microscopy demonstrates that, despite morphological...

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  3. Allan Hills 84001 ( ALH84001) is a fragment of a Martian meteorite that was found in the Allan Hills in Antarctica on December 27, 1984, by a team of American meteorite hunters from the ANSMET project. Like other members of the shergottite – nakhlite – chassignite (SNC) group of meteorites, ALH84001 is thought to have originated on Mars.

  4. Pages in category "Martian meteorites". The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes ( learn more ). Martian meteorite.

  5. en.wikipedia.org › wiki › Asteroidal_achondritesAchondrite - Wikipedia

    Achondrites account for about 8% of meteorites overall, and the majority (about two thirds) of them are HED meteorites, possibly originating from the crust of asteroid 4 Vesta. Other types include Martian , Lunar , and several types thought to originate from as-yet unidentified asteroids .

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  6. The following 24 files are in this category, out of 24 total. Martian meteorites subdivision.svg 603 × 223; 8 KB Martian Meteoritses (15651719446).jpg 800 × 537; 305 KB

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