The largest galaxy in the Local Group is the Andromeda Galaxy, also known as M31. Located approximately 2.537 million light-years from Earth, Andromeda is a spiral galaxy that contains over one trillion stars, making it significantly larger than our Milky Way galaxy. The two galaxies are on a collision course and are expected to merge in about 4.5 billion years, forming a new galaxy often dubbed "Milkomeda." Andromeda has been studied extensively, revealing insights into galaxy formation and evolution, and serves as a fascinating point of interest for astronomers and astrophysicists alike.