Clyde Tombaugh: When I was in the fourth grade, I became intensely interested in geography, and I learned it well. And in fact, by the time I was in sixth grade, I could bound every country in the world from memory.  By then, the thought occurred to me, “What would the geography be like on the other planets?” So that was my natural entrance into astronomy, you see. So I’ve been interested in that particular area ever since.  Of course, I took all the science and math that was offered in high school, and I had an uncle in Illinois who lived about nine miles from us, and he was an amateur astronomer, and he had a three-inch telescope.  So the views with that telescope were my first views of the rings of Saturn, and Jupiter’s moons, and the craters on the moon.