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Andromeda is headed toward the Milky Way, while other galaxies are moving away—and now we know why
Why is the Andromeda Galaxy moving toward us while other neighboring galaxies are speeding away? For decades, such galactic movements have puzzled astronomers. Now, computer simulations by Ewoud Wempe ...
A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...
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