Difference between revisions of "February 26, 2013"
| (3 intermediate revisions by the same user not shown) | |||
| Line 6: | Line 6: | ||
<em>image by [mailto:dpeach_78@yahoo.co.uk Damian Peach], Selsey, UK</em><br /> | <em>image by [mailto:dpeach_78@yahoo.co.uk Damian Peach], Selsey, UK</em><br /> | ||
<br /> | <br /> | ||
| − | We usually see Grimaldi as a dark spotch near the western limb. Damian's magnificent near-terminator view | + | We usually see Grimaldi as a dark spotch near the western limb. Damian's magnificent near-terminator view |
| − | shows there are many fascinating details to savor. Most arresting to me is the wedge of terraces just inside | + | shows there are many fascinating details to savor. Most arresting to me is the wedge of terraces just inside |
| − | the opposite rim. I know that China has an active lunar exploration program; these terraces, minus the green | + | the opposite rim. I know that China has an active lunar exploration program; these terraces, minus the green |
| − | of rice, will make them feel at [http://inspirationgreen.com/terraced-farms.html home]. More prosaically, the terraces are an ejecta flow from the formation of | + | of rice, will make them feel at [http://inspirationgreen.com/terraced-farms.html home]. More prosaically, the terraces are an ejecta flow from the formation of |
| − | the Orientale Basin. The terracing is not visible on the higher Sun LRO [http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=-2173171.53443&mcy=-174991.02732&mz=7 QuickMap mosaic], once again | + | the Orientale Basin. The terracing is not visible on the higher Sun LRO [http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=-2173171.53443&mcy=-174991.02732&mz=7 QuickMap mosaic], once again demonstrating the continuing value of telescopic low-Sun images. I wonder if these terraces are like [http://www.swisseduc.ch/stromboli/glossary/icons/paehoe_2.jpg ropes] in |
| − | + | ropy lava, places where the slowing flow of material crumples as the snout cools and slows while the back part | |
| − | ropy lava, places where the slowing flow of material crumples as the snout cools and slows while the back part | + | is still moving forward? Skipping over most of the other interesting features take a look at the half-shadow filled |
| − | is still moving forward? Skipping over most of the other interesting features take a look at the half-shadow filled | + | crater Damoiseau D near bottom left. Looking at the illuminated wall there is a bright rim top, with a lower dark |
| − | crater Damoiseau D near bottom left. Looking at the illuminated wall there is a bright rim top, with a lower dark | + | band - partially with a bright band within it - resting on another bright band. This looks like layering within the |
| − | band - partially with a bright band within it - resting on another bright band. This looks like layering within the | + | crater's wall, but the QuickMap [http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=-1902093.26347&mcy=-196987.18189&mz=7 view] reveals that this is an unusual concentric crater. The exact mapping of |
| − | crater's wall, but the QuickMap [http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=-1902093.26347&mcy=-196987.18189&mz=7 view] reveals that this is an unusual concentric crater. The exact mapping of | + | bands in Damian's oblique view onto the overhead LRO image is <em>an exercise left to the reader.</em> |
| − | bands in Damian's oblique view onto the overhead LRO image is <em>an exercise left to the reader.</em><br /> | + | <br /> |
<br /> | <br /> | ||
<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | ||
| Line 25: | Line 25: | ||
<br /> | <br /> | ||
<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | Rükl plate [ | + | Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_39 39]<br /> |
| − | <em>[ | + | <em>[[21st Century Atlas of the Moon|21st Century Atlas]]</em> chart 26.<br /> |
Damian's [http://www.damianpeach.com webpage] & [http://www.facebook.com/peachastro Facebook page]<br /> | Damian's [http://www.damianpeach.com webpage] & [http://www.facebook.com/peachastro Facebook page]<br /> | ||
<br /> | <br /> | ||
Latest revision as of 08:27, 28 October 2018
Ropes And Rice
image by Damian Peach, Selsey, UK
We usually see Grimaldi as a dark spotch near the western limb. Damian's magnificent near-terminator view
shows there are many fascinating details to savor. Most arresting to me is the wedge of terraces just inside
the opposite rim. I know that China has an active lunar exploration program; these terraces, minus the green
of rice, will make them feel at home. More prosaically, the terraces are an ejecta flow from the formation of
the Orientale Basin. The terracing is not visible on the higher Sun LRO QuickMap mosaic, once again demonstrating the continuing value of telescopic low-Sun images. I wonder if these terraces are like ropes in
ropy lava, places where the slowing flow of material crumples as the snout cools and slows while the back part
is still moving forward? Skipping over most of the other interesting features take a look at the half-shadow filled
crater Damoiseau D near bottom left. Looking at the illuminated wall there is a bright rim top, with a lower dark
band - partially with a bright band within it - resting on another bright band. This looks like layering within the
crater's wall, but the QuickMap view reveals that this is an unusual concentric crater. The exact mapping of
bands in Damian's oblique view onto the overhead LRO image is an exercise left to the reader.
Chuck Wood
Technical Details
2012_12_26_1926ut.
Related Links
Rükl plate 39
21st Century Atlas chart 26.
Damian's webpage & Facebook page
Yesterday's LPOD: The Truth
Tomorrow's LPOD: Snow Moon
COMMENTS?
Register, Log in, and join in the comments.
