We already do this for the starfield (that's how, for example, most Near Earth Object searches work); it's just harder to get high-resolution total-coverage ima

We already do this for the starfield (that's how, for example, most Near Earth Object searches work); it's just harder to get high-resolution total-coverage imagery for planetary surfaces. As far as I understand, we only are getting repeat imagery from the LRO because it did one fast low-resolution pass and is now doing a lower-altitude, high-resolution pass.