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The Andromeda galaxy is around 2.5 million light years away, but is moving towards out galaxy at a speed of about 100 to 140 kilometres per second (62 to 87 miles/sec). Our galaxy will collide with it in around 4.5 billion years. A long time, but you wont get far travelling at 20mph in that time, on an astronomical scale anyway, barely outside our own solar system.

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14y ago

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