The Andromeda Galaxy is a spiral galaxy located about 2.537 million light-years from Earth. It is the nearest large galaxy to the Milky Way and contains over a trillion stars, making it one of the largest galaxies in our local group. Andromeda is visible to the naked eye from Earth, appearing as a faint smudge in the night sky. It is expected to collide with the Milky Way in about 4.5 billion years, leading to the formation of a new galaxy. This event is part of the natural evolution of galaxies in the universe.