An American astronomer who proved that the universe is expanding and that objects outside our galaxy exist, fundamentally changing the scientific understanding of the cosmos. The Hubble Space Telescope is named after him.
An international tribunal began the trial of 24 high-ranking Nazi officials in Nuremberg, Germany. The trials prosecuted major war criminals for atrocities committed during World War II.
Princess Elizabeth, the future Queen Elizabeth II, married Philip Mountbatten at Westminster Abbey in London. The royal wedding provided a morale boost to the British public in the aftermath of WWII.