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Follow the link for more information. It is assumed that galaxies are distributed uniformly and the same in all directions, meaning that the Universe has neither an edge nor a center. Giant clouds later merged through gravity to form galaxies, stars, and everything else seen today. It is possible to see objects that are now further away than 13. Big Bang, while other physicists and philosophers refuse to speculate, doubting that information about prior states will ever be accessible. Universe might be one among many universes that likewise exist.