1. 
   Keldysh
   Keldysh (Келдыш) can refer to one of the following. ...
   Found op http://en.wikipedia.org/wiki/Keldysh
   
   
2. 
   Keldysh
   [crater] The crater rim is generally circular, although it gives the appearance of a slight eastward bulge. The rim edge is sharp and displays little appearance of wear, with only a tiny craterlet along the eastern edge. The inner wall slopes down without terraces to the ejecta along the bas...
   Found op http://en.wikipedia.org/wiki/Keldysh_(crater)
   
   

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