Difference between revisions of "Lunar Meteorites"

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=Lunar Meteorites=
 
=Lunar Meteorites=
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==Description==
 
==Description==
  This page concerns information and references to lunar meteorites. Such rare occurrences are the debris end-products (dust to rocks to blocks) produced by impactors striking the Moon and ejecting them off into space at great speeds. The ejected products must exceed, or be very close to, the escape velocity of the Moon (~ 2.38 km/sec) in order for them to leave the surface, where, depending on the angle and direction in which they were initially ejected, can end up in several orbital configurations. The first orbital configuration may be that of the Moon itself, however, if captured by the Earth or Sun's gravitational fields respectively, they could end up spending years to tens to thousands to millions of years before in orbit before they finaly fall to the surface of each. Some objects, of course, might also end up in regions of the outer planets like Jupiter, Saturn, Uranus or Neptune, or, being completely lost to deep space – never to be seen again. Whatever the orbital configuration, however, when such lunar fragments pass through our local space, and, land on Earth's surface, they are then considered '''lunar meteorites'''. So far todate (as of writing 10 May 2011), upto 60 kg in mass of all lunar meteorites have been catalogued, but, there are a lot more out there waiting to be discovered, or declared. <span class="membersnap">- [http://www.wikispaces.com/user/view/JohnMoore2 [[Image:JohnMoore2-lg.jpg|16px|JohnMoore2]]] [http://www.wikispaces.com/user/view/JohnMoore2 JohnMoore2] <small>May 9, 2011</small></span><br /> <br />  
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  This page concerns information and references to lunar meteorites. Such rare occurrences are the debris end-products (dust to rocks to blocks) produced by impactors striking the Moon and ejecting them off into space at great speeds. The ejected products must exceed, or be very close to, the escape velocity of the Moon (~ 2.38 km/sec) in order for them to leave the surface, where, depending on the angle and direction in which they were initially ejected, can end up in several orbital configurations. The first orbital configuration may be that of the Moon itself, however, if captured by the Earth or Sun's gravitational fields respectively, they could end up spending years to tens to thousands to millions of years before in orbit before they finaly fall to the surface of each. Some objects, of course, might also end up in regions of the outer planets like Jupiter, Saturn, Uranus or Neptune, or, being completely lost to deep space – never to be seen again. Whatever the orbital configuration, however, when such lunar fragments pass through our local space, and, land on Earth's surface, they are then considered '''lunar meteorites'''. So far todate (as of writing 10 May 2011), upto 60 kg in mass of all lunar meteorites have been catalogued, but, there are a lot more out there waiting to be discovered, or declared. <span class="membersnap">- JohnMoore2 <small>May 9, 2011</small></span><br /> <br />  
 
==Images==
 
==Images==
* [[Image:met-list.jpg|met-list.jpg]]
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* [[Image:Met-list.jpg|met-list.jpg]]
 
* Credit: (Top) [http://meteorites.wustl.edu/lunar/moon_meteorites_list_alumina.htm Example-list of lunar meteorites] available from the [http://eps.wustl.edu/ Dept., of Earth and Planetary Sciences], [http://wustl.edu/ Washington University in St. Louis]; (bottom) two Antarctic lunar meteorites – left-most [http://curator.jsc.nasa.gov/antmet/lmc/F2%20ALHA81005.pdf NASA], right-most [http://ares.jsc.nasa.gov/people/allencarl.html Dr Carlton Allen] - Curator and Manager of the Astromaterials Acquisition and Curation Office, NASA Johnson Space Centre.
 
* Credit: (Top) [http://meteorites.wustl.edu/lunar/moon_meteorites_list_alumina.htm Example-list of lunar meteorites] available from the [http://eps.wustl.edu/ Dept., of Earth and Planetary Sciences], [http://wustl.edu/ Washington University in St. Louis]; (bottom) two Antarctic lunar meteorites – left-most [http://curator.jsc.nasa.gov/antmet/lmc/F2%20ALHA81005.pdf NASA], right-most [http://ares.jsc.nasa.gov/people/allencarl.html Dr Carlton Allen] - Curator and Manager of the Astromaterials Acquisition and Curation Office, NASA Johnson Space Centre.
 
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Latest revision as of 20:23, 16 April 2018

Lunar Meteorites

met-header.jpg

Description

This page concerns information and references to lunar meteorites. Such rare occurrences are the debris end-products (dust to rocks to blocks) produced by impactors striking the Moon and ejecting them off into space at great speeds. The ejected products must exceed, or be very close to, the escape velocity of the Moon (~ 2.38 km/sec) in order for them to leave the surface, where, depending on the angle and direction in which they were initially ejected, can end up in several orbital configurations. The first orbital configuration may be that of the Moon itself, however, if captured by the Earth or Sun's gravitational fields respectively, they could end up spending years to tens to thousands to millions of years before in orbit before they finaly fall to the surface of each. Some objects, of course, might also end up in regions of the outer planets like Jupiter, Saturn, Uranus or Neptune, or, being completely lost to deep space – never to be seen again. Whatever the orbital configuration, however, when such lunar fragments pass through our local space, and, land on Earth's surface, they are then considered lunar meteorites. So far todate (as of writing 10 May 2011), upto 60 kg in mass of all lunar meteorites have been catalogued, but, there are a lot more out there waiting to be discovered, or declared. - JohnMoore2 May 9, 2011

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