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This resolution recognizes the historic discovery made on October 5, 1923, by astronomer Edwin Powell Hubble, who identified a Cepheid variable star in the Andromeda Nebula, proving that it lies beyond our Milky Way galaxy. This finding fundamentally changed humanity’s understanding of the universe by showing that the Milky Way is just one of many galaxies. The resolution also honors Henrietta Swan Leavitt, whose work on Cepheid variable stars enabled this breakthrough. It highlights the role of Carnegie Science and the Mount Wilson Observatory in advancing astronomy and celebrates over a century of scientific leadership and innovation in southern California. The resolution encourages educational and scientific institutions across the U.S. to commemorate this milestone through STEM education and public engagement. By establishing National Beyond the Milky Way Day, the resolution aims to inspire future generations and emphasize the importance of scientific research and collaboration in expanding human knowledge.