What famous galaxy is designated as M31 in the Messier Catalog?

Answer

The Andromeda Galaxy

M31 is specifically identified as the Andromeda Galaxy, which is noted as the closest major galaxy to the Milky Way.

What famous galaxy is designated as M31 in the Messier Catalog?
astronomydeep-sky objectscelestial objectsCatalogcatalogueMessierCharles Messier