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      one of the very large groups of stars and other matter that are found
      throughout the universe


Earth is a planet in the Milky Way Galaxy.

NASA scientists have found many other galaxies in the universe.


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Galaxies of All Shapes and Sizes


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This artist's concept illustrates the new view of the Milky Way
Using infrared images from NASA's Spitzer Space Telescope, scientists have discovered that the Milky Way's spiral has just two arms wrapping off the ends of a central bar of stars. Scientists had thought that the Milky Way had four major arms.
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Page Last Updated: October 9th, 2014
Page Editor: Sandra May