Andromeda Galaxy (M31) – Andromeda Galaxy is the nearest large Galaxy to Milky Way. It consists of 1 trillion stars. The Andromeda Galaxy is a spiral galaxy approximately 2.5 million light-years from Earth in the Andromeda constellation. Also known as Messier 31, M31, or NGC 224, it is often referred to as the Great Andromeda Nebula in older texts. The Andromeda Galaxy is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 30 other smaller galaxies. Although the largest, the Andromeda Galaxy may not be the most massive, as recent findings suggest that the Milky Way contains more dark matter and could be the most massive in the grouping. The 2006 observations by the Spitzer Space Telescope revealed that M31 contains one trillion (10^12) stars; at least twice the number of stars in the Milky Way galaxy, which is estimated to be 200–400 billion. Shot on Stellarvue SV80S using QSI 583wsg. 66 images of 3 minutes each – 198 minutes.