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  2. The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8 × 10 26 m). Assuming that space is roughly flat (in the sense of being a Euclidean space ), this size corresponds to a comoving volume of about 1.22 × 104 Gpc3 ( 4.22 × 105 Gly3 or 3.57 × 1080 m3 ).

    en.wikipedia.org/wiki/Observable_universe

    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
     
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    How big is the observable universe?The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8 × 10 26 m). Assuming that space is roughly flat (in the sense of being a Euclidean space ), this size corresponds to a comoving volume of about 1.22 × 104 Gpc3 ( 4.22 × 105 Gly3 or 3.57 × 1080 m3 ).
    What is the difference between the observable universe and the whole universe?Learn about the distinction between the observable universe and the whole universe. 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).
    How big is the universe today?Today the universe has expanded into an age and size that is physically only in parts observable as the observable universe, which is approximately 93 billion light-years in diameter at the present day, while the spatial size, if any, of the entire universe is unknown.
    en.wikipedia.org
    How many light-years is the observable universe?This means that the observable universe is more than 46 billion light-years in any direction from Earth and about 93 billion light-years in diameter. Given the constant expansion of the universe, the observable universe expands another light-year every Earth year.
     
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    The radius of the observable universe is therefore estimated to be about 46.5 billion light-years. Using the critical density and the diameter of the observable universe, the total mass of ordinary matter in the universe can be calculated to be about 1.5 × 10 53 kg. 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

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

    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 … 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 direction. The observable … 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. WEB3 days ago · 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 …

  6. WEBSep 29, 2020 · 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 …

  7. WEBOct 10, 2012 · Learn how the observable universe is bounded by the edge of the universe and the speed of light, and how it expands and accelerates over time. Find out the current radius of the observable universe and …

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    WEBLearn about the size, age, and speed of light of the observable universe, and how we measure distances to nearby and faraway objects. Explore the scale of the solar system, the Milky Way galaxy, and the local group of …

  9. WEBToday the universe has expanded into an age and size that is physically only in parts observable as the observable universe, which is approximately 93 billion light-years in diameter at the present day, while the spatial …

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