Galactic surprise: New find overturns theories how our galaxy evolved

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Image uploaded from a quicklink She found many galaxies evolving in the 8-billion-year period previously thought to be devoid of change. Disk galaxies become more ordered over time for several reasons. Soon after the Big Bang, everything in the universe was much closer together, so galaxies were more apt to collide. These collisions ripped apart galaxies and jumbled their contents. In time, the universe spread out, and there were fewer collisions; galaxies settled down. Looking at similar galaxies through a telescope is like looking at snapshots of our own galaxy's past. "It tells us a little more about our home in the universe It tells us a little more about our home in the universe and how we fit into the grand scheme of things; it gives us perspective on our own history from the Big Bang to life on Earth." "Usually things tend toward more disorder." In this case, they're forming ordered systems.

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