Join planetary astronomer Mike Brown, known for his groundbreaking work on the search for a ninth planet, as he delves into the mysteries of our solar system. He discusses how the strange orbits of distant objects like Sedna may hint at a massive, unseen planet lurking beyond Neptune. Brown highlights historical efforts by astronomers and the scientific advancements that have reshaped our understanding of celestial mechanics. The excitement in his voice is palpable as he details the challenges and implications of this ongoing cosmic quest.