Difference between revisions of "September 15, 2006"

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=Not Quite a Bulls-Eye=
 
=Not Quite a Bulls-Eye=
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<p>[[File:Boussingault-LPOD.jpg|Boussingault-Wirths&#038;Byrne]]<br />
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<em>Left image by [mailto:mwirths@superaje.com  Mike Wirths] and right from Lunar Orbiter IV processed by Charles Byrne</em></p>
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<p><em> Another greatest hit image from LPOD of April 10, 2006</em></p>
 
<p>Random impacts should occasionally be centered within pre-existing craters. Here is one of the most famous near-misses. Boussingault, down near the lunar south pole, is a crater within a crater. Because both are large, it is easy to see that both are impact structures - there is no waffling about possible volcanic origins for either. It is amazing that the younger inner crater, Boussingault A, did so little damage to its surrounding older crater. You can see on the Lunar Orbiter view where the continuous ejecta of &#8220;A&#8221; is draped over the terraces of Boussingault - it has a well-defined scarp where it stopped flowing uphill. It is also intriguing that the moat area between the two is filled with a smooth plains material that seems to embay the edges of &#8220;A&#8221; and thus must be younger than it. And the smaller crater (K) on the joint rim of Boussingault and &#8220;A&#8221; appears to have done no damage on its right side but its left side has covered Boussingault&#8217;s wall and apparently caused material to slump into &#8220;A&#8221;. It is remarkable that sometimes a tremendous impact producing a crater tens of kilometers across does so little damage to its immediate surroundings, and other times causes huge landslides and dumps great amounts of ejecta everywhere.</p>
 
<p>Random impacts should occasionally be centered within pre-existing craters. Here is one of the most famous near-misses. Boussingault, down near the lunar south pole, is a crater within a crater. Because both are large, it is easy to see that both are impact structures - there is no waffling about possible volcanic origins for either. It is amazing that the younger inner crater, Boussingault A, did so little damage to its surrounding older crater. You can see on the Lunar Orbiter view where the continuous ejecta of &#8220;A&#8221; is draped over the terraces of Boussingault - it has a well-defined scarp where it stopped flowing uphill. It is also intriguing that the moat area between the two is filled with a smooth plains material that seems to embay the edges of &#8220;A&#8221; and thus must be younger than it. And the smaller crater (K) on the joint rim of Boussingault and &#8220;A&#8221; appears to have done no damage on its right side but its left side has covered Boussingault&#8217;s wall and apparently caused material to slump into &#8220;A&#8221;. It is remarkable that sometimes a tremendous impact producing a crater tens of kilometers across does so little damage to its immediate surroundings, and other times causes huge landslides and dumps great amounts of ejecta everywhere.</p>
 
<p>[mailto:tychocrater@yahoo.com Chuck Wood]</p>
 
<p>[mailto:tychocrater@yahoo.com Chuck Wood]</p>
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<p><b>Yesterday's LPOD:</b> [[September 14, 2006|Unbelievable Image]] </p>
 
<p><b>Yesterday's LPOD:</b> [[September 14, 2006|Unbelievable Image]] </p>
 
<p><b>Tomorrow's LPOD:</b> [[September 16, 2006|Just Another Glorious Image]] </p>
 
<p><b>Tomorrow's LPOD:</b> [[September 16, 2006|Just Another Glorious Image]] </p>
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Latest revision as of 15:16, 15 March 2015

Not Quite a Bulls-Eye

Boussingault-Wirths&Byrne
Left image by Mike Wirths and right from Lunar Orbiter IV processed by Charles Byrne

Another greatest hit image from LPOD of April 10, 2006

Random impacts should occasionally be centered within pre-existing craters. Here is one of the most famous near-misses. Boussingault, down near the lunar south pole, is a crater within a crater. Because both are large, it is easy to see that both are impact structures - there is no waffling about possible volcanic origins for either. It is amazing that the younger inner crater, Boussingault A, did so little damage to its surrounding older crater. You can see on the Lunar Orbiter view where the continuous ejecta of “A” is draped over the terraces of Boussingault - it has a well-defined scarp where it stopped flowing uphill. It is also intriguing that the moat area between the two is filled with a smooth plains material that seems to embay the edges of “A” and thus must be younger than it. And the smaller crater (K) on the joint rim of Boussingault and “A” appears to have done no damage on its right side but its left side has covered Boussingault’s wall and apparently caused material to slump into “A”. It is remarkable that sometimes a tremendous impact producing a crater tens of kilometers across does so little damage to its immediate surroundings, and other times causes huge landslides and dumps great amounts of ejecta everywhere.

Chuck Wood

Technical Details:
18″ Starmaster dob, 2.5X’s Powermate barlow, R/IR True Tech filter, Infinity 2-2 camera, Registax 3 and Photoshop CS/ Images Plus.

Related Links:
Rükl plates 74 & 75

Yesterday's LPOD: Unbelievable Image

Tomorrow's LPOD: Just Another Glorious Image

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