The Andromeda Galaxy

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The Andromeda is part of the Local Group of galaxies. The Andromeda galaxy is the closest full size galaxy to the Milky Way. The Andromeda Galaxy is about four times bigger than the moon in the sky. Andromeda contains around one trillion stars. The Andromeda Galaxy is also the only galaxy noticeable to the naked eye in the Northern Hemisphere. The Andromeda Galaxy is the Milky Way's larget galactic acquaintance and is on course for a collision in the fututre.
It is believe that the Milky Way Galaxy and the Andromeda Galaxy, also known as M31, will collide in the future. The Andromeda Galaxy keeps moving toward the Milky Way at about 250,000 miles per hour.The Milky Way and Andromeda are moving toward each other under the pull of gravity. At first, the two galaxies may whirl past or through each other, dragging out long gravitational tails. Then the Milkey Way will be distorted out of recognition. But then the gravitational attraction of the galaxies's dark-matter halos will cause them to coalesce. When everything settles down in about one billion years , the combined ex-spirals may have created a large egg shaped galaxy blazing with newborn suns. These new star systems will be rich with heavy elements and shepherd Earthlike plants. Also, the Triangulym may be part of the collision. This collision will take place in about four billion years from now. There is also a very little chance that M33 will come toward Milky Way first and collide too. It will take another two billions years after the collion for both to join into one single galaxy. (space.com 1)
The first path to Andromeda starts from the constellation Cassiopeia. It is always above the horizon at mid-northern latitudes, opposite the North Star, Polaris, from the Big D...

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...culiar patches known as nebulae that were inside of them. Heber Curtis spotted multiple stars in Andromeda and argued that it was a separate galaxy. His argument wasn’t concluded until 1925 when Edwin Hubble identified a special kind of star known as a Cepheid variable. A Cepheid variable is a star whose characteristics allow for exact measurements of distance within Andromeda. Since Shapley had previously determined that the Milky Way was only 100,000 light-years across, Edwin Hubble’s calculations reported that the fuzzy patches were too far away to lay within the Milky Way Galaxy.(www.crystalinks.com 1)
In conclusion, the Andromeda Galaxy is a very important galaxy because it effects other galaxys, like the Milky Way Galaxy. The Andromeda Galaxy is coming closer and closer towards the Milky Way Galaxy every second and in the future will collide into one galaxy.

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