Little craters in the highlands were showing either a brilliantly lit outside of the front wall or a brighter inside of the back wall. In one case the entire circumference was lit up, like a ring. I suspect this variation must have something to do with the local tilt of the particular crater, or perhaps relative position/altitude with respect to the terminator. Comments, anyone? One would expect that craters near the terminator, all other things being equal, should have the outside of their sunward wall most illuminated, and as they rotate toward the sun, the back wall should then light up later.
|Chart 19||Moon-Lite Atlas for chart 20||Chart 21|