During April and May, the innermost planet, Mercury, will have its greatest apparition (morning or evening viewing opportunity) for the year as it graces the evening skies over the western horizon after sunset. Considering that Mercury, the fastest-orbiting planet, is typically only visible for a couple of weeks at each apparition (morning or evening), what is it that determines that one will be better than another? The answer, as they say in the real estate business, is location, location, location. By regularly observing the planet’s orbital motion, it becomes apparent why it is all about location.