Andromeda galaxy with a different name Messier 31, M31, or NGC 224 is one of the galaxies outside the Milky Way galaxy that is visible to
the naked eye, provided views on a clear night, no moon and no light pollution. The structure is similar to the Milky Way galaxy is a spiral-shaped. The distance is about 2.5 million light years. It was in the sky is in northern hemisphere skies, about 41 degrees north of the equator in the sky, both observed around September, October, November. With the naked eye, this galaxy looks like a little haze in the northern sky, but when observed through binoculars that can reveal the star dimmed star on the edge of the galaxy Andromeda, Andromeda was able to measure more than 7 times the diameter point of the month. This galaxy contains about 1 trillion stars, and moved closer to the Milky Way with speeds around 300 km / sec.
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