A giant cloud of hydrogen gas, discovered in 1963, is moving at more than 150 miles per second per second and is about to collide with the Milky Way, leading to a huge process of star formation. But this doesn’t have anything to do with that dreaded Mayan prophecy: The cloud will collide with the Milky Way in less than 40 million years, condensing into tens of thousands of bright, massive stars that will explode as supernovas within a couple of million years.
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