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Edwin Powell Hubble was an American astronomer and mathematician regarded as one of the foundational figures of modern astronomy. His observational studies on the structure and expansion of the universe played a critical role in shaping 20th century cosmology. Early Life and Education Edwin Hubble was born on 20 November 1889 in Marshfield, Missouri. His family belonged to the middle class and placed great importance on education and academic achievement. Hubble’s childhood unfolded in an enviro

Cosmic expansion is a cosmological phenomenon that describes the increase over time of the average distance between galaxies in the large-scale structure of the universe. This process demonstrates that spacetime has a dynamic structure and is one of the fundamental topics of modern cosmology. Observational data reveal the existence of cosmic expansion through the redshift phenomenon, in which the wavelength of light from distant galaxies is stretched. Today, this phenomenon is studied within the