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Last updated on April 17, 2014 at 8:20 EDT

Andromeda Galaxy vs. The Milky Way

June 12, 2012

Astronomers no longer have any doubt: Our Milky Way Galaxy will have a head-on collision with Andromeda. Fortunately, they say, Earth will survive when the two great star systems meet 4 billions years from now.  credit:  NASA