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  1. Jan 16, 2024 · A two-dimensional creature confined to the surface of the balloon could never find the center, because the center is located in 3D space, and not in the 2D space in which the creature lives. We ...

  2. Jun 16, 2024 · You can point to the center of the three-dimensional planet — it's the molten bit in the core. But try to point to the center of Earth's surface, like on a map. It could be at 0-0 latitude and ...

    • 3 min
    • Paul Sutter
  3. May 14, 2018 · The universe, in fact, has no center. Ever since the Big Bang 13.7 billion years ago, the universe has been expanding. But despite its name, the Big Bang wasn't an explosion that burst outward ...

  4. Nov 2, 2023 · As you can see, from the very nearby Universe (lower left) to distant locations over a billion light-years away (upper right), this very consistent redshift-distance relation continues to hold.

    • Ethan Siegel
  5. Aug 5, 2021 · On the largest of cosmic scales, the average difference between any two regions is merely 0.003%, or about 1-part-in-30,000. The biggest differences that we see, in fact, aren’t a function of ...

    • Ethan Siegel
  6. Oct 11, 2020 · This is the one spot on the object that stays still when the rest of the object is rotating. If you picture this concept on earth, our center of rotation is along the axis, the line that connects the North and South poles. This same concept can be transferred to a spinning plate in a circus. The center of rotation would be the very middle of ...

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  8. Aug 31, 2023 · You’d never come to an edge of this flat universe; you’d only find more and more galaxies. That’s all well and good with most astronomers. A flat universe agrees with both observation and ...

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