One of the biggest galaxy collisions ever observed is taking place at the center of this image below (clicky) and scientists think it could wind up being one of the biggest in the universe, up to 10x the size of the Milky Way.
The four white blobs in the middle are large galaxies that have begun to tangle and ultimately merge into a single gargantuan galaxy. The whitish cloud around the colliding galaxies contains billions of stars tossed out during the messy encounter. Other galaxies and stars appear in yellow, orange and red hues. Blue shows hot gas that permeates this distant region of tightly packed galaxies.
Our own Milky Way is fated to collide with Andromeda in ~ 5billion years.
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