Most astronomy neophytes might say the best time is when the moon is at full phase, but that's probably the worst time. When the moon is full, it tends to be dazzlingly bright as well as flat and one-dimensional in appearance. In contrast, the interval when the moon is at or just past first quarter phase, or at or just before last quarter phase, is when we get the best views of the lunar landscape right along the sunrise-sunset line, or terminator. (The terminator can also be defined as that variable...