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  1. theconversation.com › is-space-infinite-we-asked-5Is space infinite? We asked 5 experts - The Conversation

    Aug 10, 2021 · It also means we don’t know with any certainty what shape the universe as a whole takes — whether it’s a closed cosmic “doughnut”, a flat plain that stretches out like an endless piece ...

  2. starlust.org › current-theories-on-what-could-be5 Mind-Bending Theories About What Could Be Beyond The Universe

    Aug 9, 2024 · Multiverse/ Infinite Bubbles Theory. A Higher-Dimensional Construct/ “Dark Flow” Structures. We Are Inside A Black Hole. Infinite Universe Theory. Multiples of More of the Same. Finally: If “Universe” Means Everything. Conclusion. The observable universe or the limit of what we can see is about 93 billion light-years across, an area ...

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  4. en.wikiquote.org › wiki › Carl_SaganCarl Sagan - Wikiquote

    • Quotes
    • Quotes About Sagan
    • External Links

    There is a place with four suns in the sky — red, white, blue, and yellow; two of them are so close together that they touch, and star-stuff flows between them. I know of a world with a million moo...

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    "This is a deathwatch," Carl told me calmly. "I'm going to die." "No," I protested. "You're going to beat this, just as you have before when it looked hopeless." He turned to me with that same look...

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    The Carl Sagan Portal
    Carl Sagan on IMDb
    Can We Know the Universe? – 1979 essay by Carl Sagan, taken from his book Broca's Brain
    Talk of the Nation – Ira Flatow interviews Sagan on his book The Demon-Haunted World: Science as a Candle in the Dark (May 3, 1996)

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  5. www.universetoday.com › 143956New Research Suggests that the Universe is a Sphere and Not ...

    Nov 6, 2019 · The shape of the universe deals with the shape of space. A spherical balloon can expand as it is inflated, just as a flat rubber sheet can be stretched and remain flat. So our expanding universe ...

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  6. www.quantamagazine.org › what-is-the-geometry-ofWhat Is the Geometry of the Universe? - Quanta Magazine

    Mar 16, 2020 · Today, we know the Earth is shaped like a sphere. But most of us give little thought to the shape of the universe. Just as the sphere offered an alternative to a flat Earth, other three-dimensional shapes offer alternatives to “ordinary” infinite space. We can ask two separate but interrelated questions about the shape of the universe.

  7. news.uchicago.edu › story › new-webb-telescope-dataNew Webb Telescope data suggests our model of the universe ...

    Aug 13, 2024 · We know many things about our universe, but astronomers are still debating exactly how fast it is expanding. In fact, over the past two decades, two major ways to measure this number—known as the “Hubble constant” —have come up with different answers, leading some to wonder if there was something missing from our model of how the universe works.

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  9. www.livescience.com › universe-three-dimensionalOur universe might be a giant three-dimensional donut, really.

    Jul 19, 2021 · We could say: Now we know the size of the universe." The team found that a multiply-connected universe about three to four times larger than our observable bubble best matched the CMB data.