M31 THE GREAT ANDROMEDA GALAXY

M31 The Andromeda Galaxy, also known as Messier 31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light- years) from Earth. It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts. It received its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. Andromeda is approximately 220,000 light years across, and it is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and other smaller galaxies. The mass of the Andromeda Galaxy is estimated to be 1.5×1012 solar masses, while the Milky Way is estimated to be 8.5×1011 solar masses.
designed by Lluís Romero Ventura
The Earth astrosirius@astrosirius.org

M31 THE GREAT ANDROMEDA GALAXY

Place: Ager-Lleida-Spain SQM: 21.3 - 21.6 Dates: Sep. & Oct. 2016 Details Telescope: GSO RC14 Truss Mount: ASA DDM85 Camera: Moravian G2-8300 Focuser: Seletek Armadillo 2 Flattener: CCDT67 0.67x Exposure: L: 18x300 sec bin1 RGB: 12x300 sec bin1 Processing: Pixinsight & Photoshop CC Software: MaximDL, Sequence,Autoslew Control Remote: Talon6

Galaxies

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