XPost: sci.astro   
   From: chosp@cox.net   
      
   "Keith Edkins"  wrote in message   
   news:bv6889$2o3$1$8302bc10@news.demon.co.uk...   
   >   
   > "mlm"  wrote in message   
   > news:V_-dnZPly_IXgIjdRVn-gw@giganews.com...   
   > > In 1 of the 3 DIMES images taken by Opportunity on its approach to the   
   > > surface (at 1404m), there is a brightly ringed crater and a distinct,   
   > > slightly diffuse dark circular shadow about half a crater width to its   
   > > left.  Is this the shadow of the spacecraft?  I had thought the sunlight   
   > > incidence angle was lower since it is supposed to be around 2PM local   
   time   
   > > at Meridiani.  This seems to be directly below the spacecraft as it   
   > > descends. So maybe it is something else.   
   > >   
   >   
   > What do you make of  the 2 bright parallel lines inside the crater? A 30   
   > meter tall martian's sun-bed?   
   >   
   > Keith   
      
   Most likely sand dunes.   
      
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