meteorites: the poor man’s space probe
DESCRIPTION
Meteorites: The poor man’s space probe. From Earth’s Moon: ~35 From Mars: ~35 From asteroids: >22,000. Asteroid Eros – Orbited by NEAR* spacecraft in 2000. * NEAR = N ear E arth A steroid R endezvous mission. Eros is ~31 km in longest dimension. - PowerPoint PPT PresentationTRANSCRIPT
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Meteorites: The poor man’s space probe
From Earth’s Moon: ~35
From Mars: ~35
From asteroids: >22,000
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Asteroid Eros – Orbited by NEAR* spacecraft in 2000
* NEAR = Near Earth Asteroid Rendezvous mission. Eros is ~31 km in longest dimension
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The fall of one of the oldest preserved meteorites, on Nov. 16, 1492, at Ensißheim, Alsace-Lorraine
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The fall of one of the oldest preserved meteorites, on Nov. 16, 1492, at Ensißheim, Alsace-Lorraine
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Contemporary report of the fall on Nov. 16, 1492, of the Ensißheim, Alsace-Lorraine, meteorite
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Meeting of the “Friends of the Ensißheim Meteorite”
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Use of meteoritic iron in the manufacture of swords and knifes
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E.F.F. Chladni(1756-1827) was the
first to recognize that meteorites fall to Earth
from space.
In 1994, McCoy, Steele, Keil, Leonard and Endreß
named a new mineral, a Na-Ca-Mg phosphate from the Carlton iron
meteorite (and unknown from earth rocks)
chladniite in his honor
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Definitions
Meteoroid: An object > a molecule < asteroid traveling in space
Meteor: The light phenomenon associated with a meteoroid passing through Earth’s atmosphere
Meteorite: A meteoroid after it landed on Earth or any other planetary surface
Meteorite fall: A recovered meteorite that was seen to fall
Meteorite find: A recovered meteorite without a record of its fall
Meteorite names: After landmarks near their place of fall or find (e.g. the Honolulu meteorite)
Meteorites recovered in areas with a lack of landmarks (e.g., Antarctica, Sahara desert), are named after the general area of recovery, and given a
number (e.g., ALH84001; Sahara 97166)
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Antarctica is best place to find meteorites on Earth!
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Searching for meteorites, 1992 - 1993
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Flow of ice from center of Antarctica to the coast concentrates meteorites up-slope from mountains
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Hoba, South Africa, at 60 tons, is the largest iron meteorite preserved in one piece. Find, 1920.
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Hoba, South Africa
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Hoba, South Africa
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Ahnighito (Cape York), Greenland, 31 tons, now in the American Museum of Natural History, N.Y.
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Agpalilik, Greenland, 20 tons
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Agpalilik, Greenland, being loaded on a US Air Force vessel for transport to Denmark
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Mundrabilla, Australia, 22 tons
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Willamette, Oregon, 14.2 tons
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Morito, Mexico, 11 tons
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Jilin, China, stone meteorite impact pit
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Jilin, China, stone meteorite, 1.7 tons, fall, March 8, 1976
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Jilin, China, 1.7 ton stone meteorite (ordinary chondrite)
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Norton County, Kansas, 1 ton, stone meteorite (aubrite), fall, February 18, 1948.
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The flight-oriented Horace, Kansas, stone meteorite (ordinary chondrite. Find, 1940; side view.
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The flight-oriented Horace, Kansas, stone meteorite (ordinary chondrite. Find, 1940; front view.
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Benld, Illinois, stone meteorite (ordinary chondrite) fall, September 29, 1938.
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Sylacauga, Alabama, stone meteorite (ordinary chondrite) fall, November 30, 1954, weight 5.6 kg. Hit roof, crashed through ceiling,
and hit Mrs. Hodges on the upper thigh.
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Sylacauga, Alabama, stone meteorite (ordinary
chondrite) fall, November 30, 1954,
weight 5.6 kg. Hit roof, crashed through ceiling, and hit
Mrs. Hodges on the upper thigh.
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Peekskill, N.Y. stone meteorite (ordinary chondrite), fall, October 9, 1992, weight 12.6 kg. Hit Michelle Knapp’s car parked before her house.
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Damage to Michelle Knapp’s car, by the fall of the Peekskill stone meteorite fall, October 9, 1992.
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The happy Knapp family with the Keepskill stone meyeorite
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The Keepskill ordinary chondrite