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One of the biggest galactic collisions ever observed takes place at the center of this image. The four blobs in the middle are galaxies that have begun to merge into a single gargantuan galaxy.
Three of the galaxies are about the size of the Milky Way, while the fourth is three times as large.
The main disk of the Milky Way Galaxy is about 80,000 to 100,000 light-years in diameter, about 250,000 to 300,000 light-years in circumference, and outside the Galactic core, about 2,300–2,600 light-years in thickness
Originally posted by Syntaxstealth
i was not sure where to post this. In figured it should be under the aliens and ufo section because i don't believe the merging of galaxies is natural.