the background object. Andromeda is frequently referred to as M31 since it is the 31st object on Messier's list of diffuse sky objects. M31 is so distant
(governmental work) 204. Messier 81 (http://www.imagingdeepsky.com/Galaxies/M81/M81.htm / https://commons.wikimedia.org/wiki/File:M81.jpg?uselang=de) by Ken