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NGC 3370 Galaxy is an unbarred spiral galaxy located in the constellation Leo, notable for its spiral structure. It holds particular importance in astronomical research, especially regarding Type Ia supernova observations and cosmological distance measurements. It was discovered by William Herschel on March 18, 1784. Location and General Characteristics NGC 3370 is located approximately 30 megaparsecs (about 98 million light-years) from Earth. Its observed apparent magnitude is approximately 12.

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

Hubble's Law is a cosmological relation stating a linear relationship between the recession velocities of galaxies and their distances from the observer. This relationship was established in 1929 by Edwin Hubble through the comparison of distance measurements of galaxies with spectroscopic redshift observations. Hubble's work demonstrated that the redshift observed in the light of distant galaxies increases systematically, revealing that galaxies are moving away from each other. These observatio