Difference between revisions of "September 19, 2012"
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=A Glorious Serpentine Ridge= | =A Glorious Serpentine Ridge= | ||
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| − | <em>image by [mailto:bruno.daversin48@orange.fr Bruno Daversin], France</em><br /> | + | <em>image by [mailto:bruno.daversin48@orange.fr" rel="nofollow Bruno Daversin], France</em><br /> |
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| − | One of the most wondrous lunar sights can be observed when the Moon is 6 days old. Paralleling the eastern shore of Mare Serenitatis is the snakelike Serpentine Ridge. This fine name has been around since Schroeter (1790s), but the IAU, in their woeful ignorance of history and selenology, gave different parts of this obvious single structure two unnecessary names: Dorsum Smirnov and Dorsum Lister. Bruno Daversin's exquisite image reveals both the broad and detailed structure of this wrinkle ridge system. Mare ridges generally have a a wide swelling with one edge being steeper-sided and higher. This can be well seen near the crater Very (largest crater near the upper left). From [http://www.lpi.usra.edu/resources/mapcatalog/LTO/lto42b3_1/72dpi.jpg LTO 42B3] we can see that the broad part of the ridge rises as much as 200 m over a horizontal distance of 4-5 km, but the steep part of the ridge rises 200 m higher in a distance of a little less than a kilometer. At the southern end of the ridge there is a strongly curved arc that looks almost like a crater rim. And unlike the rest of the ridge, this arc has its tall side on the eastern edge of the broad structure. I don't know what that means, but it is different. Near the top right corner of this scene (near the crater Borel) is a lower ridge system that may actually be a ghost crater - i.e. ridges marking the rim of a lava covered crater. Other [http://www.lpod.org/archive/archive/2004/05/LPOD-2004-05-01.htm images] of the area show that the ridge continues as almost a full circle. In general, Serenitatis must be deep for few partially flooded craters exist there, but it makes sense that this may be one because it is on the shallow outer bench of the mare.<br /> | + | One of the most wondrous lunar sights can be observed when the Moon is 6 days old. Paralleling the eastern shore of Mare Serenitatis is the snakelike Serpentine Ridge. This fine name has been around since Schroeter (1790s), but the IAU, in their woeful ignorance of history and selenology, gave different parts of this obvious single structure two unnecessary names: Dorsum Smirnov and Dorsum Lister. Bruno Daversin's exquisite image reveals both the broad and detailed structure of this wrinkle ridge system. Mare ridges generally have a a wide swelling with one edge being steeper-sided and higher. This can be well seen near the crater Very (largest crater near the upper left). From [http://www.lpi.usra.edu/resources/mapcatalog/LTO/lto42b3_1/72dpi.jpg" rel="nofollow LTO 42B3] we can see that the broad part of the ridge rises as much as 200 m over a horizontal distance of 4-5 km, but the steep part of the ridge rises 200 m higher in a distance of a little less than a kilometer. At the southern end of the ridge there is a strongly curved arc that looks almost like a crater rim. And unlike the rest of the ridge, this arc has its tall side on the eastern edge of the broad structure. I don't know what that means, but it is different. Near the top right corner of this scene (near the crater Borel) is a lower ridge system that may actually be a ghost crater - i.e. ridges marking the rim of a lava covered crater. Other [http://www.lpod.org/archive/archive/2004/05/LPOD-2004-05-01.htm" rel="nofollow images] of the area show that the ridge continues as almost a full circle. In general, Serenitatis must be deep for few partially flooded craters exist there, but it makes sense that this may be one because it is on the shallow outer bench of the mare.<br /> |
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| − | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | + | <em>[mailto:tychocrater@yahoo.com" rel="nofollow Chuck Wood]</em><br /> |
| − | This is a classic LPOD from [http://www.lpod.org/archive/LPOD-2004-11-17.htm Nov. 17, 2004] - almost 8 years ago!<br /> | + | This is a classic LPOD from [http://www.lpod.org/archive/LPOD-2004-11-17.htm" rel="nofollow Nov. 17, 2004] - almost 8 years ago!<br /> |
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<strong>Technical Details:</strong><br /> | <strong>Technical Details:</strong><br /> | ||
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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
Rükl plate [http://the-moon.wikispaces.com/R%C3%BCkl+24 24]<br /> | Rükl plate [http://the-moon.wikispaces.com/R%C3%BCkl+24 24]<br /> | ||
| − | Ludiver Observatory - [http://www.ludiver.com/index.php?SujetID=5&ArticleID=90 lunar photos]<br /> | + | Ludiver Observatory - [http://www.ludiver.com/index.php?SujetID=5&ArticleID=90" rel="nofollow lunar photos]<br /> |
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Revision as of 22:36, 4 January 2015
A Glorious Serpentine Ridge
image by " rel="nofollow Bruno Daversin, France
One of the most wondrous lunar sights can be observed when the Moon is 6 days old. Paralleling the eastern shore of Mare Serenitatis is the snakelike Serpentine Ridge. This fine name has been around since Schroeter (1790s), but the IAU, in their woeful ignorance of history and selenology, gave different parts of this obvious single structure two unnecessary names: Dorsum Smirnov and Dorsum Lister. Bruno Daversin's exquisite image reveals both the broad and detailed structure of this wrinkle ridge system. Mare ridges generally have a a wide swelling with one edge being steeper-sided and higher. This can be well seen near the crater Very (largest crater near the upper left). From " rel="nofollow LTO 42B3 we can see that the broad part of the ridge rises as much as 200 m over a horizontal distance of 4-5 km, but the steep part of the ridge rises 200 m higher in a distance of a little less than a kilometer. At the southern end of the ridge there is a strongly curved arc that looks almost like a crater rim. And unlike the rest of the ridge, this arc has its tall side on the eastern edge of the broad structure. I don't know what that means, but it is different. Near the top right corner of this scene (near the crater Borel) is a lower ridge system that may actually be a ghost crater - i.e. ridges marking the rim of a lava covered crater. Other " rel="nofollow images of the area show that the ridge continues as almost a full circle. In general, Serenitatis must be deep for few partially flooded craters exist there, but it makes sense that this may be one because it is on the shallow outer bench of the mare.
" rel="nofollow Chuck Wood
This is a classic LPOD from " rel="nofollow Nov. 17, 2004 - almost 8 years ago!
Technical Details:
Sept 4, 2004. Ludiver Observatory 600 mm (24") Schmidt-Cassegrain & B&W webcam.
Related Links
Rükl plate 24
Ludiver Observatory - " rel="nofollow lunar photos
