The Andromeda Galaxy
The Andromeda Galaxy is a spiral galaxy located approximately 2.5 million light-years from the Milky Way. It is the largest galaxy in the Local Group and contains a large population of stars, gas, and dust.
The Andromeda Galaxy is discussed in galactic astronomy, extragalactic astronomy, and cosmology.
Status
The Andromeda Galaxy has been observed telescopically for centuries and studied across the electromagnetic spectrum. Measurements of its structure, motion, and interaction with nearby galaxies continue to be refined.