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  2. The observable universe is approximately 93 billion light-years in diameter. This number is derived from several considerations. A light-year, the distance light can travel in one Earth year, is 9.46 trillion kilometres (5.88 trillion miles).
    www.britannica.com/topic/observable-universe
    Size: 94 Billion Light Years The most distant objects in the Universe are 47 billion light years away, making the size of the observable Universe 94 billion light years across.
    imagine.gsfc.nasa.gov/educators/programs/cosmic…
    The observable Universe is 93 billion light-years in diameter. Some scientists believe its true size is even scarier than that. By using the Bayesian model averaging, scientists estimated that the Universe is at least 250 times larger than the observable Universe, or at least 7 trillion light-years in diameter.
    nineplanets.org/questions/how-big-is-the-universe/
    The diameter of the observable universe is estimated at about 28 billion parsecs (93 billion light-years). As a reminder, a light-year is a unit of length equal to just under 10 trillion kilometres (or about 6 trillion miles).
    twistedsifter.com/2012/10/putting-the-size-of-the-ob…
     
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    Observable universe - Wikipedia

    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 direction. The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8×10 m). Assuming that space is roughly … 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 … See more

    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 Big Bang to have had enough time to reach Earth or space-based instruments, and therefore lie outside the … See more

    Number of galaxies and stars
    The observable universe contains as many as an estimated 2 trillion galaxies and, overall, as many … 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 gamma ray burst, GRB 090423, was found to have a redshift of 8.2, which indicates that the collapsing star that caused it, exploded … See more

    Overview image
    Large-scale structure image
    Overview image

    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 anything by direct observation about any part of the universe that is See more

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

    Bolshoi Cosmological Simulation – Computer simulation of the universe
    Causality (physics) – Physics of the cause–effect relation
    Chronology of the universe – History and future of the universe See more

     
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  5. Observable universe | Definition, Size, Description,

    WEBAug 21, 2024 · The observable universe is approximately 93 billion light-years in diameter. This number is derived from several considerations. A light-year, the distance light can travel in one Earth year, is 9.46 trillion …

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    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...

  10. How Big is the Universe? | The Observable Universe …

    WEBOct 26, 2022 · How Big is the Universe? The actual spatial size of the universe is unknown. However, by measuring the observable universe, the current size of the universe is approximately 95 billion light-years in …

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  13. How Big Is the Universe? - Live Science

    WEBAug 31, 2019 · One study found that the actual universe could be at least 250 times the size of the 46.5 billion light-years we can actually see.

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