Play Video
1
Nakhla Meteorite
Nakhla Meteorite
::2010/11/11::
Play Video
2
Nakhla  Meteorite (private collector, not me)
Nakhla Meteorite (private collector, not me)
::2013/12/29::
Play Video
3
ALIENI MARZIANI DENTRO UN METEORITE? - NAKLHA METEOR
ALIENI MARZIANI DENTRO UN METEORITE? - NAKLHA METEOR
::2014/08/28::
Play Video
4
Weird Microscopic Structure Found in Mars Meteorite
Weird Microscopic Structure Found in Mars Meteorite
::2014/10/03::
Play Video
5
Meteorites on the ice!
Meteorites on the ice!
::2014/12/01::
Play Video
6
Water Rich Meteorite Linked To Mars Crust
Water Rich Meteorite Linked To Mars Crust
::2013/01/03::
Play Video
7
Martian Meteorite NWA 7034
Martian Meteorite NWA 7034
::2013/01/05::
Play Video
8
Teach Astronomy - Meteorite Collisions
Teach Astronomy - Meteorite Collisions
::2010/07/08::
Play Video
9
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
::2014/08/25::
Play Video
10
Black Beauty meteorite may reveal secrets of Mars climate
Black Beauty meteorite may reveal secrets of Mars climate
::2013/01/04::
Play Video
11
El meteorito Nakhla parece demostrar la existencia de vida en Marte
El meteorito Nakhla parece demostrar la existencia de vida en Marte
::2014/08/27::
Play Video
12
Cosmos: After Show Episode #11 - "The Immortals"
Cosmos: After Show Episode #11 - "The Immortals"
::2014/06/18::
Play Video
13
Q&BA: How do Mars meteorites get to Earth?
Q&BA: How do Mars meteorites get to Earth?
::2012/10/01::
Play Video
14
Meteorite Pulled From Russian Lake is One Of World
Meteorite Pulled From Russian Lake is One Of World's Biggest
::2013/10/17::
Play Video
15
Free Samples from Mars - Paul De Carli (SETI Talks)
Free Samples from Mars - Paul De Carli (SETI Talks)
::2013/07/23::
Play Video
16
Tissint meteorite from London
Tissint meteorite from London's Natural History Museum
::2013/10/02::
Play Video
17
FILME DE NAKHLA PARTE 02 A
FILME DE NAKHLA PARTE 02 A
::2013/08/17::
Play Video
18
Rare Martian meteorite travels millions of miles
Rare Martian meteorite travels millions of miles
::2012/02/08::
Play Video
19
Iconic: Tagish Lake Meteorite
Iconic: Tagish Lake Meteorite
::2010/01/11::
Play Video
20
Rare meteorites from London
Rare meteorites from London's Natural History Museum
::2013/10/08::
Play Video
21
Todd Parker and The Witches - Nakhla
Todd Parker and The Witches - Nakhla
::2013/05/05::
Play Video
22
les meteorite  religieux d egypte
les meteorite religieux d egypte
::2013/07/24::
Play Video
23
Abiogenesis on Sudan Meteorite Amino Acids Form From Gas
Abiogenesis on Sudan Meteorite Amino Acids Form From Gas
::2010/12/16::
Play Video
24
Imilac meteorite from London
Imilac meteorite from London's Natural History Museum
::2013/10/07::
Play Video
25
The Barwell meteorite at London
The Barwell meteorite at London's Natural History Museum
::2013/10/01::
Play Video
26
Mini on Meteorites
Mini on Meteorites
::2011/03/21::
Play Video
27
Russian meteorite on display at Field Museum
Russian meteorite on display at Field Museum
::2013/04/24::
Play Video
28
1.9" 100ct Sea Green GEM MOLDAVITE Tektite Meteorite Impact Glass Czech for sale
1.9" 100ct Sea Green GEM MOLDAVITE Tektite Meteorite Impact Glass Czech for sale
::2014/06/06::
Play Video
29
Meteorite or Meteowrong
Meteorite or Meteowrong
::2010/02/01::
Play Video
30
Micro meteorite search
Micro meteorite search
::2013/07/06::
Play Video
31
Field Museum Meteorite Display
Field Museum Meteorite Display
::2009/10/27::
Play Video
32
Iron-Nickel Meteorite from Namibia at Sharjah
Iron-Nickel Meteorite from Namibia at Sharjah
::2013/09/11::
Play Video
33
Tunisia 2014 meteorite search (18)
Tunisia 2014 meteorite search (18)
::2014/04/10::
Play Video
34
I found meteorite..need expert opinion..
I found meteorite..need expert opinion..
::2012/04/11::
Play Video
35
Touching the Mars meteorite - Astronaut Hall of Fame
Touching the Mars meteorite - Astronaut Hall of Fame
::2011/07/18::
Play Video
36
Meteorites at the Natural History Museum
Meteorites at the Natural History Museum
::2012/08/28::
Play Video
37
Puerto Lápice Meteorite (private collector, not me)
Puerto Lápice Meteorite (private collector, not me)
::2013/12/29::
Play Video
38
The Natural History Museum, Meteorites & Videos!
The Natural History Museum, Meteorites & Videos!
::2012/04/10::
Play Video
39
Message From A Meteorite
Message From A Meteorite
::2014/11/05::
Play Video
40
Meteorites
Meteorites
::2013/02/13::
Play Video
41
Retail Items Made From Meteorites
Retail Items Made From Meteorites
::2013/02/21::
Play Video
42
Main mass of Sutter
Main mass of Sutter's Mill: SM53 Slices with scalebar.mpg
::2013/08/20::
Play Video
43
Life on other planets
Life on other planets
::2011/02/16::
Play Video
44
63gram NWA 869 slice
63gram NWA 869 slice
::2011/11/06::
Play Video
45
Austria - Natural History Museum
Austria - Natural History Museum
::2010/02/03::
Play Video
46
Haze Honey Dew
Haze Honey Dew
::2013/02/15::
Play Video
47
Eigene bombe
Eigene bombe
::2011/01/01::
Play Video
48
Curiosity presencia el impacto de un meteorito en Marte
Curiosity presencia el impacto de un meteorito en Marte
::2014/05/01::
Play Video
49
Huge Meteor Impact - Direct Hit Simulation - 20 Miles From NewYork City
Huge Meteor Impact - Direct Hit Simulation - 20 Miles From NewYork City
::2014/02/08::
Play Video
50
Maniac From Mars
Maniac From Mars
::2014/11/08::
NEXT >>
RESULTS [51 .. 101]
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.
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 famous 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 to 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] 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.[9]

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.[10] 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.[11]

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, alanines, 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. ^ BBC News - Space rock re-opens Mars debate
  10. ^ BBC News - Life on Mars - new claims
  11. ^ 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). doi:10.1089/ast.2013.1069. Retrieved 2014-10-24. 
  • Hendrix, Howard V. (2012). Red Rover, Red Rover. Analog SFSF (July/Aug). pp. 109–116.  (Nakhla meteorite part of the plot)

External links[edit]

Wikipedia content is licensed under the GFDL License
Powered by YouTube
MASHPEDIA
LEGAL
  • Mashpedia © 2014