On 30 December 1924, Edwin Hubble, an eminent astronomer, revolutionised our understanding of the cosmos by formally announcing the existence of galaxies beyond the Milky Way at a meeting of the American Astronomical Society.
Using the powerful Hooker Telescope at the Mount Wilson Observatory, Hubble's meticulous observations of Cepheid variables in the Andromeda Nebula provided conclusive evidence that it was not a nebula within our galaxy but an entirely separate galactic system.
This groundbreaking discovery not only expanded the boundaries of the known universe but also laid the foundation for modern cosmology, forever altering humanity's perspective of its place in the cosmos.
