Andromeda Galaxy: Our Nearest Galactic Neighbor

The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. The Milky Way and Andromeda galaxies are expected to collide in around 4–5 billion years. Andromeda has a diameter of about 46.56 kiloparsecs (152,000 light-years)[8] and is approximately 765 kpc (2.5 million light-years) from Earth.

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