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  • Observable universe - Wikipedia
    If the universe is finite but unbounded, it is also possible that the universe is smaller than the observable universe In this case, what we take to be very distant galaxies may actually be duplicate images of nearby galaxies, formed by light that has circumnavigated the universe
  • Universe - Wikipedia
    Further observational improvements led to the realization that the Sun is one of a few hundred billion stars in the Milky Way, which is one of a few hundred billion galaxies in the observable universe At the largest scale, galaxies are distributed uniformly and the same in all directions
  • Sizes of Things in Space
    The list below is roughly ordered in size from smallest to biggest although there are numerous overlaps and complications when comparing sizes (nothing is ever straightforward in astronomy)
  • Universe Size Comparison: Smallest to Largest (Inspired by Kurzgesagt)
    In this Universe Size Comparison, we zoom out from the Planck Length, the smallest measurable scale in physics, all the way to the Observable Universe Along the way we explore atoms,
  • Largest To Smallest Universe Stars Galaxy: Hierarchy Explained . . .
    Stars are the smallest building blocks of the universe, while galaxies are the largest structures we know of The universe is so big that even the biggest galaxies are just tiny specks compared to its total size
  • From the smallest to the biggest objects in space - Big Think
    Here are the largest and smallest objects known across the fascinating and diverse cosmos Within each category, some variations are negligible, while others are truly profound
  • What is the absolute smallest thing in the universe?
    This quantum foam could potentially contain virtual particles and mini black holes constantly popping in and out of existence Whether these fleeting entities are the absolute smallest thing is a question beyond our current understanding
  • CUriosity: What is the smallest thing in the universe?
    This week, Ethan Neil, associate professor in the Department of Physics, answers: “What is the smallest thing in the universe?” Part of the tunnel that makes up the Large Hadron Collider in Switzerland
  • The 13 scales that define our physical Universe - Big Think
    On the smallest of physical scales, we have the fundamental, elementary particles, which build up to assemble nuclei, atoms, molecules, and even larger structures
  • The Universe By Numbers - Physics of the Universe
    The Universe By Numbers Some of the numbers, both small and large, that are bandied around in modern physics are very difficult to grasp Below is a table listing - from the infinitesimally small to the incomprehensibly large - some of the numbers which are relevant to the subject matter





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