Embark on a captivating journey through astronomical history in this conference talk that explores the ever-changing definition of planets in our solar system. Discover how the count of planets has fluctuated over centuries, from the ancient seven classical planets to the current eight, with numerous additions and subtractions along the way. Learn about forgotten celestial bodies like Ceres, Psyche, and Eros, as well as controversial decisions such as Pluto's demotion. Delve into the scientific and human factors that have influenced our understanding of the solar system, including the search for hypothetical planets like Vulcan and Planet X. Gain insights into how astronomical discoveries, technological advancements, and scientific debates have shaped our current view of the solar system and what it means to be a planet.