The Andromeda Galaxy Is Not Bigger Than the Milky Way After All
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SPACE.comSamantha Mathewson
The Andromeda Galaxy Is Not Bigger Than the Milky Way After All
The Andromeda galaxy was previously thought to be two or three times the mass of the Milky Way, but a new tool for measuring the mass of galaxies reveals that our nearest neighbor is just about the same size as our own galaxy.
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