real money slots casinos Payment Methods for US Customers casino slots usa internet casino links best online casinos 2013 no limit deposit and fastest payouts top casinos for real money sic bo online game meilleur casino en ligne bo argent reel

April 10, 2006

NOT QUITE A BULLS-EYE

Filed under: — chuckwood @ 12:01 am

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

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:
R√ľkl plates 74 & 75

SUPPORT LPOD - VISIT A SPONSOR (CLICK AN AD BELOW)!
Now you can support LPOD when you buy ANY book (including the source of half of today’s LPOD) from Amazon thru LPOD!

Comments (2)

&uot

Powered by WordPress