We're going to crash! Billions of years from now our galaxy will collide with the Andromeda galaxy. Those who would rather not wait around that long to rubberneck may want to visit this site by the American Museum of Natural History. It offers a nice computerized space trip envisioning what the cataclysmic event might look like. Click on "interactive" to view this simulation. Also click the other links, which lead to sites from which the data used here was taken.
American Museum of Natural History
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