Share
VIDEOS 1 TO 50
Nakhla meteorite - Video Learning - WizScience.com
Nakhla meteorite - Video Learning - WizScience.com
Published: 2015/09/04
Channel: Wiz Science™
Nakhla Meteorite
Nakhla Meteorite
Published: 2017/10/30
Channel: Vatican Observatory Foundation
Nakhla meteorite
Nakhla meteorite
Published: 2015/03/22
Channel: BBC World Service - Discovery
Nakhla Meteorite
Nakhla Meteorite
Published: 2010/11/12
Channel: 06solareclipse
Nakhla Meteorite
Nakhla Meteorite
Published: 2017/10/30
Channel: Katie Steinke
Nakhla  Meteorite (private collector, not me)
Nakhla Meteorite (private collector, not me)
Published: 2013/12/29
Channel: David Allepuz
Nakhla
Nakhla
Published: 2015/07/05
Channel: Sergey Vasiliev
Martian meteorites with Ian Nicklin
Martian meteorites with Ian Nicklin
Published: 2013/11/13
Channel: Royal Ontario Museum
mars meteorite similar to  Mars NWA 5219 meteorite textures
mars meteorite similar to Mars NWA 5219 meteorite textures
Published: 2017/01/27
Channel: sarbooss
Mars and Meteorite and Opals: Signs of Life?
Mars and Meteorite and Opals: Signs of Life?
Published: 2015/07/13
Channel: Star News
First meteorite linked to Martian crust
First meteorite linked to Martian crust
Published: 2017/06/06
Channel: 21 News
Mars Meteorite Found Holds 10x
Mars Meteorite Found Holds 10x's MORE Water
Published: 2013/01/03
Channel: J7409
Nakhlite - Video Learning - WizScience.com
Nakhlite - Video Learning - WizScience.com
Published: 2015/09/04
Channel: Wiz Science™
ALIENI MARZIANI DENTRO UN METEORITE? - NAKLHA METEOR
ALIENI MARZIANI DENTRO UN METEORITE? - NAKLHA METEOR
Published: 2014/08/28
Channel: [OBY] Divulgazione Scientifica
Martian Meteorite NWA 7034
Martian Meteorite NWA 7034
Published: 2013/01/06
Channel: Kowch737
Water Rich Meteorite Linked To Mars Crust
Water Rich Meteorite Linked To Mars Crust
Published: 2013/01/04
Channel: UFO Hunting Clouds Productions
Meteorite or Meteowrong
Meteorite or Meteowrong
Published: 2010/02/02
Channel: Dinger51
Opal Discovery On Mars May Be Key to Proving Ancient Life On Red Planet
Opal Discovery On Mars May Be Key to Proving Ancient Life On Red Planet
Published: 2015/07/08
Channel: DAHBOO77
First Laser Analysis of a Martian Meteorite
First Laser Analysis of a Martian Meteorite
Published: 2016/11/08
Channel: Archyworld Films
Russian meteorite on display at Field Museum
Russian meteorite on display at Field Museum
Published: 2013/04/24
Channel: Chicago Tribune
regolith meteorite, lunar, martian ....what is this ???
regolith meteorite, lunar, martian ....what is this ???
Published: 2013/11/01
Channel: meteorite RiKo
Meteorite Fragment From Russia Found In A Lake - On Science
Meteorite Fragment From Russia Found In A Lake - On Science
Published: 2013/10/17
Channel: red Orbit
Tissint Mars Meteorite 190 grams
Tissint Mars Meteorite 190 grams
Published: 2013/10/23
Channel: naturalbornclimbers
Martian Meteorite
Martian Meteorite
Published: 2011/11/28
Channel: InceptionMoments
Todd Parker and The Witches - Nakhla
Todd Parker and The Witches - Nakhla
Published: 2013/05/05
Channel: Todd Parker and The Witches
GUY CONSOLMAGNO SJ with Lucette Verboven (2, meteorites)
GUY CONSOLMAGNO SJ with Lucette Verboven (2, meteorites)
Published: 2015/01/04
Channel: Lucette Verboven
The Barwell meteorite at London
The Barwell meteorite at London's Natural History Museum
Published: 2013/10/01
Channel: Astronomy magazine
Martian meteorite
Martian meteorite
Published: 2015/11/20
Channel: muraturile
Meteorites
Meteorites
Published: 2013/02/13
Channel: steamlaboratory
El meteorito de Nakhla ¿evidencia de vida en Marte?
El meteorito de Nakhla ¿evidencia de vida en Marte?
Published: 2016/04/24
Channel: Pallandox
Marte meteorite . BLACK BEAUTY
Marte meteorite . BLACK BEAUTY
Published: 2016/01/03
Channel: henzopaladino
Teach Astronomy - Meteorite Collisions
Teach Astronomy - Meteorite Collisions
Published: 2010/07/08
Channel: Teach Astronomy
"Big Bang" Theory, Martian Meteorites, Spaces Gasses & more.
"Big Bang" Theory, Martian Meteorites, Spaces Gasses & more.
Published: 2008/02/17
Channel: LearnMediaOfAmerica
NASA Claims Thigh Bone Is Just Rock, Mars Rolling Rocks & More WUITS Space News
NASA Claims Thigh Bone Is Just Rock, Mars Rolling Rocks & More WUITS Space News
Published: 2014/08/26
Channel: WhatsUpInTheSky37
Manchester museums new meteorite handling table- David Gelsthorpe
Manchester museums new meteorite handling table- David Gelsthorpe
Published: 2015/12/10
Channel: Paige Tucker
Meteorite Naturhistor. Museum, Wien
Meteorite Naturhistor. Museum, Wien
Published: 2010/10/17
Channel: craterinspection
Astronomy For Everyone - Episode 56 - Meteorite Collecting January 2014
Astronomy For Everyone - Episode 56 - Meteorite Collecting January 2014
Published: 2015/02/22
Channel: Astronomy For Everyone
Earthfiles Podcast #25: Peru Meteorite, Disappearing Bumblebees and Parallel Universes
Earthfiles Podcast #25: Peru Meteorite, Disappearing Bumblebees and Parallel Universes
Published: 2015/12/20
Channel: Earthfiles
MICRORGANISMI EXTRATERRESTRI NEI METEORITI? -PANSPERMIA- [DUE VIDEO IN UNO!]
MICRORGANISMI EXTRATERRESTRI NEI METEORITI? -PANSPERMIA- [DUE VIDEO IN UNO!]
Published: 2015/12/29
Channel: [OBY] Divulgazione Scientifica
Martian Meteorite NWA 2990, a shergottite
Martian Meteorite NWA 2990, a shergottite
Published: 2013/05/28
Channel: MeteoritesTv
Is this a meteorite?
Is this a meteorite?
Published: 2013/07/17
Channel: CaffeinePizza
Manchester visit
Manchester visit
Published: 2012/11/02
Channel: Luther Jackson
Shiny Metal Meteorite Spotted On Mars
Shiny Metal Meteorite Spotted On Mars
Published: 2016/11/02
Channel: Monique
Sikhote-Alin
Sikhote-Alin 'Bullet' Meteorite - 178 g
Published: 2014/11/17
Channel: Sun.org
Moon Meteorite
Moon Meteorite
Published: 2012/12/01
Channel: Johnny Utah
Sudbury Basin - Video Learning - WizScience.com
Sudbury Basin - Video Learning - WizScience.com
Published: 2015/09/02
Channel: Wiz Science™
Martian meteorite yields more evidence of the possibility of life on Mars
Martian meteorite yields more evidence of the possibility of life on Mars
Published: 2017/06/06
Channel: 21 News
Meteorites at the Natural History Museum
Meteorites at the Natural History Museum
Published: 2012/08/28
Channel: TheSickness851
Flying the Tswaing Crater
Flying the Tswaing Crater
Published: 2014/04/06
Channel: zer0tilt
2007 Carancas impact event - Video Learning - WizScience.com
2007 Carancas impact event - Video Learning - WizScience.com
Published: 2015/09/29
Channel: Wiz Science™
NEXT
GO TO RESULTS [51 .. 100]

WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Nakhla meteorite
Nakhla meteorite.jpg
Nakhla meteorite (BM1913,25): two sides and its inner surfaces after breaking it in 1998
Type Achondrite
Class Martian meteorite
Group Nakhlite
Country Egypt
Region Abu Hummus, Beheira Governorate
Coordinates 31°9′N 30°21′E / 31.150°N 30.350°E / 31.150; 30.350Coordinates: 31°9′N 30°21′E / 31.150°N 30.350°E / 31.150; 30.350
Observed fall Yes
Fall date 1911-06-28
TKW 10 kilograms (22 lb)
407310main jsc2009e243551.jpg
Scanning electron microscope (SEM) image of the surface of a grain of the meteorite showing small pits filled with material. On Earth, similar pits are carved by bacteria.
Commons page Related media on Wikimedia Commons
SEM image of a chip of the Naklha meteorite, depicting possible biomorph material: the larger, broad knife-like and the small, donut-shaped features.

Nakhla is a martian meteorite fallen in Egypt in 1911. It was the first meteorite reported from Egypt, the first one to suggest signs of aqueous processes on Mars, and the prototype for Nakhlite type of meteorites.

History[edit]

It fell on Earth on June 28, 1911, at approximately 09:00, in the Abu Hommos district, Alexandria Governorate, Egypt (now Abu Hummus, Beheira Governorate), in the area of the village of El Nakhla El Bahariya. The stones were collected near hamlets of Ezbet Abdalla Zeid, Ezbet Abdel Malek, Ezbet el Askar, and Ezbet Saber Mahdi.[1][2][3] Many people witnessed the meteorite approaching from north-west, inclination about 30°, along the track marked with a column of white smoke. Several explosions were heard before it fell to Earth in an area of 4.5 kilometres (2.8 mi) in diameter, and about forty pieces were recovered;[4] the fragments were buried in the ground up to a meter deep. From an estimated original weight of 10 kilograms (22 lb), recovered fragments ranged in weight from 20 g to 1813 g.[1][2]

Two fragments, found near Ezbet Abdel Malek, were presented by the Egyptian Government to the British Museum.[1]

The Nakhla dog[edit]

One fragment of the meteorite was said to have landed on a dog, as observed by a farmer named Mohammed Ali Effendi Hakim in the village of Denshal supposedly vaporizing the animal instantly. Since no remains of the dog were recovered and there were no other eyewitness to the dog's demise, this story remains apocryphal.[2] However, the story of the Nakhla dog has become something of a legend among astronomers.[5]

Classification[edit]

It is the prototypical example of the Nakhlite type meteorite of the SNC Group of Mars meteorites.

A number of meteorites thought to have originated from Mars have been catalogued from around the world,[6] including the Nakhlites. These are considered to have been ejected by the impact of another large body colliding with the Martian surface. They then travelled through the solar system for an unknown period of time before penetrating the Earth's atmosphere.

Signs of water[edit]

Nakhla is the first Martian meteorite to show signs of aqueous processes on Mars. The rock contains carbonates and hydrous minerals, formed by chemical reactions in water. In addition, the rock was exposed to water after it formed, which caused secondary accumulations of minerals. The carbonates contain more 13C than rocks formed on Earth, indicating Martian origin.[7]

Signs of life[edit]

In March 1999, after receiving part of the meteorite from the British Museum in 1998,[4] a team from NASA's Johnson Space Center examined the Nakhla meteorite using an optical microscope and a powerful scanning electron microscope (SEM), revealing possibly biomorphic forms of a limited size range, among other features.[8][9] London's Natural History Museum, which holds several intact fragments of the meteorite, allowed NASA researchers to break one open in 2006, providing fresh samples, relatively free from Earth-sourced contamination. These scientists found an abundance of complex carbonaceous material occupying dendritic pores and channels in the rock, resembling the effects of bacteria observed in rocks on Earth.[10]

A debate took place at the 37th Lunar and Planetary Science Conference in March 2006 in Houston, Texas over the postulate that carbon-rich content within the pores of the rocks consisted of the remains of living matter. Because carbon is the fourth most abundant element in the universe (after hydrogen, helium, and oxygen), the presence of shapes resembling living organisms was considered insufficient by most attendees to prove that bacteria once lived on Mars.[11] A team concluded in 2014 that although the abiotic scenario is considered to be the most reasonable explanation for the shapes in this meteorite, it is evident that the Martian subsurface contains niche environments where life could develop.[9]

Amino acids within the meteorite[edit]

In 1999, various amino acids were isolated from the meteorite fragment at Johnson Space Center. Among them were aspartic acid, glutamic acid, glycine, alanine, and butyric acid. However, it is not clear whether they were originally from the meteorite or the product of terrestrial contamination.[7]

See also[edit]

References[edit]

  1. ^ a b c "the meteoric stones of El Nakhla El Baharia (Egypt)", by G.T.Prior, Keeper of Minerals in the British Museum; read November 14, 1911, Mineralogical Magazine, 1912, vol. 16, pp 274-281
  2. ^ a b c "The Nakhla Meteorite" - From NASA's Jet Propulsion Laboratory
  3. ^ "Nakhla meteorite fragment" - From the Natural History Museum. Rotatable image of a fragment of the meteorite. URL accessed September 6, 2006.
  4. ^ a b McBridge, Kathleen M.; Righter, K. "The 100th Anniversary of the Fall of Nakhla: The Subdivision of BM1913,25". NASA. Johnson Space Flight Center. Retrieved 15 September 2011. 
  5. ^ meteoritestudies.com The Nakhla Dog
  6. ^ "Mars Meteorites". NASA. Retrieved 2010-02-16. 
  7. ^ a b Glavin, Daniel P. Amino acids in the Martian meteorite Naklah. Retrieved 2010-11-13.
  8. ^ "Space rock re-opens Mars debate" - February 8, 2006 BBC News article. URL accessed September 6, 2006.
  9. ^ a b Chatzitheodoridis, Elias; Haigh, Sarah; Lyon, Ian (2014). "A Conspicuous Clay Ovoid in Nakhla: Evidence for Subsurface Hydrothermal Alteration on Mars with Implications for Astrobiology". Astrobiology. 14 (18): 651–693. Bibcode:2014AsBio..14..651C. doi:10.1089/ast.2013.1069. PMC 4126275Freely accessible. PMID 25046549. Retrieved 2014-10-24. 
  10. ^ BBC News - Space rock re-opens Mars debate
  11. ^ BBC News - Life on Mars - new claims
  • Hendrix, Howard V. (2012). Red Rover, Red Rover. Analog SFSF (July/Aug). pp. 109–116.  (Nakhla meteorite part of the plot)

External links[edit]

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Powered by YouTube
Wikipedia content is licensed under the GFDL and (CC) license