The Planet 9 meme centers on the scientific hypothesis that a massive, unseen planet exists far beyond Neptune in the outer reaches of our solar system. This concept captured the public imagination, blending serious astronomy with internet speculation and humor regarding Pluto's demotion from planet status. The meme typically uses artistic renderings of a dark, frozen world or complex orbital diagrams to represent something that is theoretically there but remains impossible to find. It is frequently used metaphorically to describe missing items, elusive life goals, or anything that feels 'ghostly' yet mathematically certain. Whether used for niche space science jokes or broader existential humor, the Planet 9 template highlights the human drive to find what is hidden in the dark.