The telescope was trained on the moon and there was a line-up of people waiting to take a look. From the top of a mountain in Montana, the view was spectacular! The craters on the upper right-hand side of the moon’s surface were especially clear and everyone was amazed at what they saw. Several nights later, I took the same telescope to the same location and trained it on the same subject. However, this time what we saw was different. This time the craters on the lower left-hand side were the ones that were particularly visible. The ones on the right-hand side that we had marvelled at only a few nights before were now completely washed in sunlight and invisible to us. The same object, viewed from the same spot, at approximately the same time ...