Difference between revisions of "May 28, 2013"
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=Ridges, Real And Apparent= | =Ridges, Real And Apparent= | ||
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| − | <em>south up image by [mailto:dpeach_78@yahoo.co.uk | + | <em>south up image by [mailto:dpeach_78@yahoo.co.uk Damian Peach], Selsey, U.K.</em><br /> |
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| − | The most dramatic views of the Moon are along the terminator, witness this Clavius image captured last month by Damian. In addition to the drama, two features caught my attention. With this lighting there are numerous parallel ridges In the foreground - especially at bottom left. I used my two new lunar globes to see what is in the trend of these ridge, and the answer is nothing, really. These ridges, which are real features that are only noticeably with the right illumination, do not seem to be associated with any impact basin. But they are approximately aligned with the lunar grid pattern that Bob Strom and others mapped in the 1960s and 70s. The second unusual feature is the ripple pattern on the smooth-floored depression between Rutherfurd and Gruemberger. In this image it looks like mare ridge-like features cross the floor. But on the higher Sun LRO [http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=-344468.45808&mcy=-1926246.15457&mz=7 | + | The most dramatic views of the Moon are along the terminator, witness this Clavius image captured last month by Damian. In addition to the drama, two features caught my attention. With this lighting there are numerous parallel ridges In the foreground - especially at bottom left. I used my two new lunar globes to see what is in the trend of these ridge, and the answer is nothing, really. These ridges, which are real features that are only noticeably with the right illumination, do not seem to be associated with any impact basin. But they are approximately aligned with the lunar grid pattern that Bob Strom and others mapped in the 1960s and 70s. The second unusual feature is the ripple pattern on the smooth-floored depression between Rutherfurd and Gruemberger. In this image it looks like mare ridge-like features cross the floor. But on the higher Sun LRO [http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=-344468.45808&mcy=-1926246.15457&mz=7 QuickMap] there is no evidence for ripples. Instead, it appears that craters and crater chains create shadows and ridges that my brain misinterpreted. So in the image we see real aligned ridges that don't show up in some other views, and other ripple-like ridges that aren't real. <br /> |
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| − | <em>[mailto:tychocrater@yahoo.com | + | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><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 [ | + | Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_72 72]<br /> |
| − | <em>[ | + | <em>[[21st Century Atlas of the Moon|21st Century Atlas]]</em> chart 15.<br /> |
| − | Damian's [http://www.damianpeach.com/index.htm | + | Damian's [http://www.damianpeach.com/index.htm website] and Facebook [https://www.facebook.com/peachastro page] (with recent images of Moon, Jupiter and comets).<br /> |
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| + | <p><b>Yesterday's LPOD:</b> [[May 27, 2013|Big Sister, Little Brother?]] </p> | ||
| + | <p><b>Tomorrow's LPOD:</b> [[May 29, 2013|One Shot of Rings]] </p> | ||
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Latest revision as of 08:33, 28 October 2018
Ridges, Real And Apparent
south up image by Damian Peach, Selsey, U.K.
The most dramatic views of the Moon are along the terminator, witness this Clavius image captured last month by Damian. In addition to the drama, two features caught my attention. With this lighting there are numerous parallel ridges In the foreground - especially at bottom left. I used my two new lunar globes to see what is in the trend of these ridge, and the answer is nothing, really. These ridges, which are real features that are only noticeably with the right illumination, do not seem to be associated with any impact basin. But they are approximately aligned with the lunar grid pattern that Bob Strom and others mapped in the 1960s and 70s. The second unusual feature is the ripple pattern on the smooth-floored depression between Rutherfurd and Gruemberger. In this image it looks like mare ridge-like features cross the floor. But on the higher Sun LRO QuickMap there is no evidence for ripples. Instead, it appears that craters and crater chains create shadows and ridges that my brain misinterpreted. So in the image we see real aligned ridges that don't show up in some other views, and other ripple-like ridges that aren't real.
Chuck Wood
Technical Details
April 19, 2013. C14.
Related Links
Rükl plate 72
21st Century Atlas chart 15.
Damian's website and Facebook page (with recent images of Moon, Jupiter and comets).
Yesterday's LPOD: Big Sister, Little Brother?
Tomorrow's LPOD: One Shot of Rings
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