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  2. In physics, we usually distinguish between these two notions of universe as, one, the observable universe, which is everything whose existence we've thus far been able to confirm or observe, or could, in principle, observe if we pointed our telescopes at it, and two, the Universe with a capital U, or the whole universe, which is everything that exists, has existed, or will exist, anytime, anywhere, regardless of whether or not we are aware of it yet or ever will be.
    www.britannica.com/video/185559/lesson-universe-distinction
    www.britannica.com/video/185559/lesson-universe-distinction
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  3. People also ask
    Is the observable universe bigger than the entire universe?The entire universe on the other hand is possibly, and even likely, infinite based on the observable shape of the universe from within the observable range of the entire universe. Therefore, it is possible that the entire universe is infinitely larger than the observable universe. What is the Observable Universe?
    What is the difference between visible and observable universe?Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination—and the observable universe, which includes signals since the beginning of the cosmological expansion (that is, the end of the inflationary epoch in modern cosmology).
    Are all places in the universe observable?Every place in the universe has its own observable universe, which may or may not overlap with the one centered on Earth. The word observable does not depend on whether modern technology actually allows detection of radiation from an object in this region.
    What do we know about the observable universe?So within the observable universe, what do we know exists? Pretty much just three things. Spacetime, particles, and the physical laws that describe how spacetime and those particles interact to give rise to gravity and matter and forces and everything else.
     
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    Observable universe - Wikipedia

    Sometimes astrophysicists distinguish between the observable universe and the visible universe. The former includes signals since the end of the inflationary epoch , while the latter includes only signals emitted since recombination . See more

    The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation See more

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    Number of galaxies and stars
    The observable universe contains as many as an estimated 2 trillion galaxies and, overall, as many as an estimated 10 stars – more stars … See more

    The most distant astronomical object identified (as of September of 2022) is a galaxy classified as JADES-GS-z13-0. In 2009, a See more

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    Overview image

    The universe's size is unknown, and it may be infinite in extent. Some parts of the universe are too far away for the light emitted since the See more

    Both popular and professional research articles in cosmology often use the term "universe" to mean "observable universe". This can be justified on the grounds that we can never know … See more

    The comoving distance from Earth to the edge of the observable universe is about 14.26 gigaparsecs (46.5 billion light-years or 4.40×10 m) in any … See more

    Sky surveys and mappings of the various wavelength bands of electromagnetic radiation (in particular 21-cm emission) have yielded much … See more

     
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  5. Observable universe | Definition, Size, Description,

    WEB6 days ago · Karen Sottosanti. Observable universe, the region of space that humans can actually or theoretically observe with the aid of technology. The observable universe, which can be thought of as a …

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  11. How large is the observable universe? | NOVA | PBS

    WEBOct 10, 2012 · The time that has elapsed since the Big Bang is 13.75 billion years. Multiple the two figures and—voilà—we find that over the entire history of the universe, light could have travelled 13.75 ...

  12. NASA – Hubble Digs Deeply, Toward Big Bang - Science@NASA

  13. Ask Astro: How much of the universe can we …

    WEBOct 15, 2021 · The exact size of the whole universe is unknown, but estimates put it at around 23 trillion light-years in diameter. Other cosmologists say that the whole universe may simply be infinite.

  14. The Visible Universe, Then and Now - Popular Science

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  20. Why is the observable Universe larger than its age would suggest?

  21. Ask Ethan: How Large Is The Entire, Unobservable Universe?

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  24. Universe Could be 250 Times Bigger Than What is Observable

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  26. Could the observable universe be bigger than the universe?