Pluto Never Forget

The cosmic demotion heard 'round the solar system! Poor Pluto got voted off the planetary island in 2006 when astronomers decided nine was just too many for their tidy classification system. The International Astronomical Union basically said "you must be THIS big to ride" and Pluto didn't measure up. Now it's just hanging out in the "dwarf planet" zone with its fellow rejects. The scientific equivalent of getting uninvited from the cool kids' table after 76 years of membership. Some planetary scientists are still fighting for Pluto's honor though—the ultimate academic grudge match.