https://www2.lpod.org/index.php?title=February_12,_2019&feed=atom&action=historyFebruary 12, 2019 - Revision history2024-03-29T15:10:05ZRevision history for this page on the wikiMediaWiki 1.31.1https://www2.lpod.org/index.php?title=February_12,_2019&diff=44209&oldid=prevApi: Created page with "__NOTOC__ =Rayology= Originally published December 4, 2009 <!-- Start of content --> <!-- ws:start:WikiTextHeadingRule:1:<h1> --> <!-- ws:start:WikiTextLocalImageRu..."2019-02-12T09:03:22Z<p>Created page with "__NOTOC__ =Rayology= Originally published December 4, 2009 <!-- Start of content --> <!-- ws:start:WikiTextHeadingRule:1:<h1> --> <!-- ws:start:WikiTextLocalImageRu..."</p>
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=Rayology=<br />
Originally published December 4, 2009<br />
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<em>north to left [http://lpod.org/coppermine/displayimage.php?pos=-4350 image] by [mailto:HowardEskildsen@msn.com Howard Eskildsen]</em><br /><br />
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We don't understand rays well enough. Back in 1960 Shoemaker showed that they were ejecta from impact craters, and sometime in the 90s B. Ray Hawke and his colleagues recognized that rays could have two components, freshly pulverized rocks and bright highland rocks. So we know something about their emplacement and composition. But their shapes and lengths and even their non-radiality are not well understood. The rays emanating from the two little [[October_8,_2006|craters]] on either side of Stevinus are good examples. First, these rays seem to be very long for the small diameters (8 and 12 km) of their source craters. Second, note the broad rays to their north (left) that are not all radial to them - how exactly, do non-radial rays form? And, as we've commented before. the shapes of rays have never been studied and classified. Who will be a champion ray researcher?<br /><br />
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /><br />
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<strong>Technical Details</strong><br /><br />
11/30/2009; 02:08 UT. Meade 6&quot;, f/8 Refractor + DMK 41AU02.AS, 2-image composite<br /><br />
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<strong>Related Links</strong><br /><br />
Rükl plates [https://the-moon.us/wiki/R%C3%BCkl_59 59] &amp; [https://the-moon.us/wiki/R%C3%BCkl_69 69]<br /><br />
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<p><b>Yesterday's LPOD:</b> [[February 11, 2019|Volcanic Hinterland]] </p><br />
<p><b>Tomorrow's LPOD:</b> [[February 13, 2019|Terminator Tales]] </p><br />
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