. # 4 A close-up of a crater within a crater (Babbage) on the Moon. Right of center is a small, nearly circular crater, smack in the middle of a larger, not-as-spherical, crater. Again, in order to see this, the terminator (the light-dark "line" separating day and night) is just to the right. This allows the crater walls to have some light shine on the INSIDE and thus allow us to see it from Earth. #4 from IMG0020.pcd, taken 04/22/94, f/6.3, ASA 100, 1sec, 12mm