Difference between revisions of "September 10, 2024"

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=Bravo L'artiste=
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=Agricola Straits=
Originally published April 26, 2014
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Originally published April 21, 2014
 
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<em>drawings by [http://www.astrosurf.com/magnitude78/serge/ Serge Vieillard], Noumea, New Caledonia</em><br />
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<em>Apollo 15-88-11982 Hasselblad image from [http://www.lpi.usra.edu/resources/apollo/catalog/70mm/magazine/?88 LPI Apollo Image Atlas]</em><br />
 
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I remember the disbelief and awe when the first lunar [http://www.lpod.org/archive/archive/2004/02/LPOD-2004-02-04.htm images] with the Ludiver Observatory 24&quot; by Bruno Daversin were released. The combination of large aperture, stacking of video images, and masterful technique produced unsurpassed images. Now those feelings return with the discovery of an extraordinary astronomical artist, Serge Viellard. Jocelyn Sérot alerted me to Serge's drawing of the recent lunar eclipse that appeared on the French Astrosurf [http://www.astrosurf.com/ubb/Forum3/HTML/040770.html website]. The drawings start with the bottom one as the eclipsed Moon rises through low clouds. Serge used a series of his own outline maps of the Moon, applying colors and hues as the Moon rose and the eclipse evolved. As striking as this set of drawings is I was not prepared for the amazing collection of drawings of Moon, planets, Sun, nebulae and galaxies on Serge's website. Individual lunar formations are captured in about three dozen [http://translate.google.com/translate?sl=auto&amp;tl=en&amp;js=y&amp;prev=_t&amp;hl=en&amp;ie=UTF-8&amp;u=http%3A%2F%2Fwww.astrosurf.com%2Fmagnitude78%2Fserge%2F&amp;edit-text=&amp;act=url drawings], each a clear and careful depiction. Immediately below the lunar drawings on Serge's web page are beautiful drawings of solar prominences and the 2012 transit of Venus. Clicking on tabs for planets and galactic features reveals that Serge, like masterful observers of 150 years ago, has captured the universe with only pencils and paper. I am pleased to have discovered this lunar artiste<br />
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The Agricola Mountains is a peculiar and unexplained lunar formation. It is long, narrow and slightly curved so that its western end is closer to the [http://www2.lpod.org/wiki/December_5,_2008 Aristarchus Plateau] than is its eastern end. That end is broader, appearing to be made of an elongated cluster of peaks. Interestingly there is small, cratered plateau along the ridge crest, suggesting that the peaks may have once been part of a more extensive surface; but it does not match the nearby Aristarchus Plateau. The middle length of the Agricola Mountains is very narrow and spine-like - no one knows why. A low broad dome butts against the middle of the northern side mountain range, and lower Sun [http://www.lpod.org/archive/LPOD-2004-09-03.htm views] show it to be more densely cratered than surrounding mare, and hence older. Clementine [http://www.mapaplanet.org/explorer-bin/explorer.cgi?map=Moon&amp;layers=moon_clementine_multi&amp;west=302.00&amp;south=26.31&amp;east=313.25&amp;north=31.95&amp;center=307.63&amp;defaultcenter=on&amp;grid=none&amp;stretch=none&amp;projection=SIMP&amp;r=5&amp;g=3&amp;b=1&amp;advoption=NO&amp;info=NO&amp;resolution=64&amp;scale=0.9476&amp;imageTopX=-341611.494826&amp;imageTopY=1054816.696805 multispectral]  and [http://www.mapaplanet.org/explorer-bin/explorer.cgi?map=Moon&amp;layers=moon_clementine_ratio&amp;west=302.00&amp;south=26.31&amp;east=313.25&amp;north=31.95&amp;center=307.625&amp;defaultcenter=on&amp;grid=none&amp;stretch=none&amp;projection=SIMP&amp;advoption=NO&amp;info=NO&amp;resolution=64 ratio] images show that the dome, and more surprisingly, the Agricola Strait - the lava between the mountains and the Aristarchus Plateau - have colors that match the Plateau. This implies that the dome and the Strait lavas are covered by the pyroclastics that erupted from Schröter's Valley and drape the Plateau. But the surrounding maria are not. I am confused, for the Strait lavas have fewer craters than more distant lavas and I would think they are younger. Perhaps Paul Spudis or some other Clementine expert can help resolve this perplexity?<br />
 
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br />
 
<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br />
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<strong>This is a classic LPOD from [http://www2.lpod.org/wiki/December_7,_2008 Dec 7, 2008.]<br />
 
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<strong>Technical Details</strong><br />
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</strong>Related Links**<br />
2014-04-17. 16 inch ultralight reflector. From a Google [http://translate.google.com/translate?sl=auto&amp;tl=en&amp;js=y&amp;prev=_t&amp;hl=en&amp;ie=UTF-8&amp;u=http%3A%2F%2Fwww.astrosurf.com%2Fmagnitude78%2Fserge%2F&amp;edit-text=&amp;act=url translation] of Serge's description: &quot;...drawings are just Crayonnages in color on 82 mm circular templates. They attempt to reproduce at best the observed color sensation, here exacerbated by the instrumental diameter. This information is then fused on the detailed image of the final design implementation gray for these operations.&quot;<br />
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Rükl plate [https://the-moon.us/wiki/Rükl_18 18]<br />
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McEwen et al (1994) [http://www.sciencemag.org/cgi/content/abstract/266/5192/1858 Clementine Observations of the Aristarchus Region of the Moon.] <em>Science 266</em>, 1858-62.<br />
 
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<strong>Related Links</strong><br />
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<p><b>Yesterday's LPOD:</b> [[September 9, 2024|Unrolled]] </p>
Serge's [http://www.astrosurf.com/magnitude78/serge/ website]<br />
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<p><b>Tomorrow's LPOD:</b> [[September 11, 2024|Modifying the Hole]] </p>
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<p><b>Yesterday's LPOD:</b> [[September 9, 2024|Tribute To Image Processing Software Developers]] </p>
 
<p><b>Tomorrow's LPOD:</b> [[September 11, 2024|Cosmic Reflections]] </p>
 
 
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Latest revision as of 02:24, 10 September 2024

Agricola Straits

Originally published April 21, 2014 LPOD-Dec7-08.jpg
Apollo 15-88-11982 Hasselblad image from LPI Apollo Image Atlas

The Agricola Mountains is a peculiar and unexplained lunar formation. It is long, narrow and slightly curved so that its western end is closer to the Aristarchus Plateau than is its eastern end. That end is broader, appearing to be made of an elongated cluster of peaks. Interestingly there is small, cratered plateau along the ridge crest, suggesting that the peaks may have once been part of a more extensive surface; but it does not match the nearby Aristarchus Plateau. The middle length of the Agricola Mountains is very narrow and spine-like - no one knows why. A low broad dome butts against the middle of the northern side mountain range, and lower Sun views show it to be more densely cratered than surrounding mare, and hence older. Clementine multispectral and ratio images show that the dome, and more surprisingly, the Agricola Strait - the lava between the mountains and the Aristarchus Plateau - have colors that match the Plateau. This implies that the dome and the Strait lavas are covered by the pyroclastics that erupted from Schröter's Valley and drape the Plateau. But the surrounding maria are not. I am confused, for the Strait lavas have fewer craters than more distant lavas and I would think they are younger. Perhaps Paul Spudis or some other Clementine expert can help resolve this perplexity?

Chuck Wood
This is a classic LPOD from Dec 7, 2008.

Related Links**
Rükl plate 18
McEwen et al (1994) Clementine Observations of the Aristarchus Region of the Moon. Science 266, 1858-62.

Yesterday's LPOD: Unrolled

Tomorrow's LPOD: Modifying the Hole



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