The Andromeda Galaxy is located north of the constellation that bears its name and appears as a “long nebulous spot” (Redd, 2012) in the sky with a visible star confusing patch of stars stretching “as long as the width of the full moon, half as wide, and six times that length in fullness. This galaxy contains a concentrated bulge of matter at its center, surrounded by a 260,000 light-year long disk of gas, dust and stars, more than 2.5 times longer than the Milky Way" (Redd, 2012) containing approximately a trillion stars per a quarter, less than the Milky Way which is more massive with half a billion stars in a quarter and more dark matter. Andromeda is a spiral galaxy whose disk containing the spiral arms does not have a “hard boundary” but rather areas of density including a very thin area containing young, hot stars and an area of ​​older stars of about 1000 parsecs. From the looks of it, it appears to have more than one disc. The Andromeda disk is composed of gas, dust and stars approximately 260,000 light-years in size, compared to the Milky Way which is 100,000 light-years across. Andromeda has a “double core as determined in 1992.” (Hubble zooms in on the double nucleus in the Andromeda Galaxy, 2012) The nucleus of this galaxy consists of "an elliptical ring of old reddish stars orbiting the black hole." (Hubble zooms in on the double nucleus in the Andromeda Galaxy, 2012) The Andromeda Galaxy is the closest spiral galaxy to the Milky Way, 2.5 million light-years away, as well as being the most distant object visible to the eye naked. Like most galaxies, Andromeda's composition contains a black hole at the center as well as large numbers of stars, dark matter and dust. “Located in the northern sky, Andromeda was named... center of the chart...... by SPACE.com contributor Nola Taylor Redd | May 8, 2012 2:23pm ET2) Copyright © 2013 Constellation Guide. Powered by WordPress and Hybrid3) Image of the weekend: supermassive black hole in the Andromeda Galaxy/The Daily Galaxy, Great Discoveries Channel/April 28, 20134) NASA press release dated 06/12/13(5) Treasure of black holes discovered in the Andromeda Galaxy/by Clara Moskowitz, assistant editor-in-chief of SPACE.com | 12 June 2013 19:22 ETNASA Jet propulsion6) ESA/20117) Hubble, 20128) http://www.physics.ucla.edu/~huffman/m31.html9) NASA/Amazing Andromeda Galaxy/10.3.200610) (Andromeda Galaxy Great Nebula in Andromeda, M31, NGC 224)11) Alpheratz, in Andromeda, part of Great Square/ Larry Sessions and Deborah Byrd in Tonight | Brightest Stars on October 7, 2013) http://earthsky.org/brightest-stars/alpheratz-belongs-to-andromeda-but-pegasus-can-claim-it