Hubble's Law, also known as the Hubble expansion, is one of the most fundamental concepts in modern cosmology. It states that the farther away a galaxy is from us, the faster it is moving away. This phenomenon is evident in the redshift of light emitted by these distant objects. There are several synonyms for Hubble's Law, including the Hubble Constant, Hubble's Law of Cosmic Expansion, and the Hubble Redshift-Distance Law. These terms are often used interchangeably and refer to the same idea. The study of the Hubble Law has revolutionized our understanding of the universe and has helped us to piece together the many mysteries of the cosmos.