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  Apollo moon rocks: Measurement, marking tools

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Author Topic:   Apollo moon rocks: Measurement, marking tools
TLIGuy
Member

Posts: 13
From: Virginia
Registered: Jul 2013

posted 04-04-2014 05:46 AM     Click Here to See the Profile for TLIGuy     Edit/Delete Message   Reply w/Quote
Anyone here willing to school me on what all the components are in this image of a moon rock? I'm not so much interested in the rock at this time as I am the display and it's parts.

I see three main things.

  1. Rock sits on a round circle that appears to have a compass rose. Is the rock placed in a certain position to signify the position found on the surface of the moon or make finding a point of interest on the rock easier to find and make notes about surface features?

  2. Above the rock are numbers that can be flipped through. What are they showing? Along the bottom I see a scale marked cm. I assume this is the measurement?

  3. Lastly, what is the little block to the right? I see them in numerous pictures with different letters on each side.

spaced out
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Posts: 2691
From: Paris, France
Registered: Aug 2003

posted 04-04-2014 06:16 AM     Click Here to See the Profile for spaced out   Click Here to Email spaced out     Edit/Delete Message   Reply w/Quote
I can answer no. 3 - that's a scale cube, commonly used with meteorites.

Each side of the cube measures exactly 1cm. The faces are marked "T" for top, N/E/S/W for the side faces and "B" for bottom, and can be aligned to show the alignment of the meteorite when it is photographed in situ.

I would assume the sample is also positioned on compass rose in the photo according to how it was found on the lunar surface.

I believe the numbers in the background are the unique id of the sample, but I could be wrong.

TLIGuy
Member

Posts: 13
From: Virginia
Registered: Jul 2013

posted 04-04-2014 06:52 AM     Click Here to See the Profile for TLIGuy     Edit/Delete Message   Reply w/Quote
Okay, that makes total sense and I can see how the cube is positioned in the same direction as the radials on the base.

Jurg Bolli
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Posts: 565
From: Albuquerque, NM
Registered: Nov 2000

posted 04-04-2014 07:08 AM     Click Here to See the Profile for Jurg Bolli   Click Here to Email Jurg Bolli     Edit/Delete Message   Reply w/Quote
The numbers in the back are for the number of the sample, and the leading 6 indicates that this rock was brought back from Apollo 16.

TLIGuy
Member

Posts: 13
From: Virginia
Registered: Jul 2013

posted 04-04-2014 07:17 AM     Click Here to See the Profile for TLIGuy     Edit/Delete Message   Reply w/Quote
Very interesting and thanks.

Is the sample number broken down into two parts, before and after the comma?

Robert Pearlman
Editor

Posts: 29344
From: Houston, TX
Registered: Nov 1999

posted 04-04-2014 09:48 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
The numbers before the comma are the sample number, the numbers after the comma are the slice (or fragment number).
quote:
Originally posted by Jurg Bolli:
...the leading 6 indicates that this rock was brought back from Apollo 16.
Just to expand upon this for all six missions that brought back moon rocks, Apollo 11 sample numbers begin with "10", Apollo 12 samples begin with "12", Apollo 14 begins with "14", Apollo 15 begins "15", Apollo 16 (as noted) begins "6" and Apollo 17 begins "7".

mode1charlie
Member

Posts: 584
From: Honolulu, HI, USA
Registered: Sep 2010

posted 04-04-2014 03:45 PM     Click Here to See the Profile for mode1charlie   Click Here to Email mode1charlie     Edit/Delete Message   Reply w/Quote
I would also hazard a guess that the colored circles below the numbers are a color scale to gauge the accuracy of specimen photos.

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