| 词条 | Allan Hills 77005 |
| 释义 |
|Name= Allan Hills 77005 |Image= {{multiple images |align=center |direction=horizontal |header= |width= |image1=ALHA1-AllanHills77005-MartianMeteorite.gif |caption1= exterior |width1=137|image2=ALHA-AllanHills77005-Interior-MartianMeteorite.gif |caption2=interior |width2=135 |footer= }}|Image_caption= Meteorite ALH-77005 |Type= Achondrite (unique)[1][1] |Clan= Martian meteorite |Group= |Grouplet= |Structural_classification= |Composition= ~55% olivine, ~35% pyroxene, ~8% maskelynite and ~2% opaques[3] |Shock= |Weathering= A[1] |Country= Antarctica |Region= Allan Hills |Lat_Long= {{Coord|76|43|00|S|159|40|00|E|display=inline,title}}[1] |Observed_fall= No[1] |Fall_date= |Found_date= 29 December 1977 (Japanese National Institute of Polar Research mission)[7][2] |TKW= 482.5 g[1] |Image2= |Image2_caption= }}Allan Hills 77005 (also known as Allan Hills A77005, ALHA77005 , ALH77005 and ALH-77005[3][7]) is a Martian meteorite that was found in the Allan Hills of Antarctica in 1977 by a Japanese National Institute of Polar Research mission team.[12] Notably, ALH-77005 was the first such meteorite found in Antarctica. Nonetheless, like other members of the group of SNCs (shergottite, nakhlite, chassignite), ALH-77005 is thought to be from Mars.[4] On discovery, its mass was {{Convert|482.5|g|lb|abbr=on}}. Initial geological examination determined that ALH-77005 was composed of ~55% olivine, ~35% pyroxene, ~8% maskelynite and ~2% opaques.[5] In March 2019, researchers reported the possibility of biosignatures in this Martian meteorite based on its microtexture and morphology as detected with optical microscopy and FTIR-ATR microscopy, and on the detection of mineralized organic compounds.[6][7][8] The researchers found embedded organic material as well as the presence of organic matter in mineralised form "such as different forms of bacteria" in the meteorite, suggesting that life could have existed on the planet Mars.[7] More broadly, and as a result of their studies, the researchers suggest solar system materials should be carefully studied to determine whether there may be signs of microbial forms within other space rocks as well.[7] See also{{Colbegin|colwidth=30em}}
References1. ^{{cite journal |author=McSween Jr, Harry Y. |display-authors=et al. |title=Petrogenetic relationship between Allan Hills 77005 and other achondrites |url=https://www.sciencedirect.com/science/article/pii/0012821X79901298 |date=1 November 1979 |journal=Earth and Planetary Science Letters |volume=45 |issue=2 |pages=275-284 |doi=10.1016/0012-821X(79)90129-8 |accessdate=4 April 2019 }} 2. ^{{cite web |last=Baalke |first=Ron |title=The ALHA 77005 Meteorite |url=https://www2.jpl.nasa.gov/snc/alha.html |date= |work=NASA |accessdate=4 April 2019 }} 3. ^1 2 3 4 5 {{cite web|author=Staff |title=Meteoritical Bulletin Database: Allan Hills 77005 |url=https://www.lpi.usra.edu/meteor/metbull.php?sea=alh+77005&sfor=names&ants=&nwas=&falls=&valids=&stype=contains&lrec=50&map=ge&browse=&country=All&srt=name&categ=All&mblist=All&rect=&phot=&strewn=&snew=0&pnt=Normal%20table&code=1321 |date=31 March 2019 |work=Meteoritical Bulletin Database |accessdate=4 April 2019}} 4. ^{{cite news |last=Anderson |first=Paul Scott |title=New evidence for life in a Martian meteorite? - The discovery of fossilized microbes in Martian meteorites has been claimed before. Now scientists in Hungary add a new study of the ALH-77005 meteorite, with some intriguing new evidence. |url=https://earthsky.org/space/evidence-fossil-life-martian-meteorite-alh-77005 |date=7 April 2019 |work=Earth & Sky |accessdate=7 April 2019 }} 5. ^1 {{cite web |author=Meyer, C - Martian Meteorite Compendium |title=ALH77005 - 482grams - Intermediate Lherzolitic Shergottite |url=https://curator.jsc.nasa.gov/antmet/mmc/alh77005.pdf |format=PDF |date=2012 |work=NASA |accessdate=4 April 2019 }} 6. ^1 2 {{cite journal |author=Gyollai, Ildikó |display-authors=et al. |title=Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? |url=https://www.degruyter.com/view/j/astro.2019.28.issue-1/astro-2019-0002/astro-2019-0002.xml |date=29 March 2019 |work=De Gruyter |accessdate=4 April 2019 }} 7. ^1 2 3 {{cite news |author=De Gruyter |title=Life on Mars? - A Martian meteorite discovered 40 years ago delivers fresh evidence that life once existed on Mars |url=https://www.eurekalert.org/pub_releases/2019-04/dg-lom040419.php |date=4 April 2019 |work=EurekAlert! |accessdate=4 April 2019}} 8. ^{{cite news |author=De Gruyter |title=Life on Mars? |url=https://phys.org/news/2019-04-life-mars.html |date=4 April 2019 |work=Phys.org |accessdate=5 April 2019 }} Further reading
External links{{Commons category|ALH77005}}
6 : Astrobiology|Astronomy in the Antarctic|Extraterrestrial life|Martian meteorites|Meteorites found in Antarctica|Natural history of Antarctica |
| 随便看 |
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。