Death of Edwin Hubble (American astronomer) on September 28 marks the passing of one of the most influential astronomers of the twentieth century. Hubble died on this date in 1953 at the age of 63 in San Marino, California. He played a pivotal role in advancing the understanding of the universe’s structure and expansion. Edwin Hubble’s observations led to the discovery of galaxies beyond the Milky Way and provided evidence that the universe is expanding. The Hubble Law, based on his findings, demonstrated that galaxies move away from each other at speeds proportional to their distance from Earth. This discovery laid the foundation for the Big Bang theory and fundamentally changed humanity’s perspective on its place in the cosmos. Hubble’s death on September 28, 1953, was a significant moment in the history of science, and the global scientific community recognized the loss of a pioneering figure in astronomy. Today, his legacy is honored through the Hubble Space Telescope, which continues to explore the depths of space in his name. The anniversary is often marked by the publication of articles and scientific programs highlighting Hubble’s life and achievements. This observance was added to some Gregorian calendars after his death in 1953 to commemorate his scientific contributions and to recognize his transformative impact on human understanding of the universe.