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  2. 93 billion light-years
    • According to 2 sources
    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.
    A light-year is the distance that light travels in one year, which is about 5.88 trillion miles. The Observable Universe is estimated to be about 93 billion light-years in diameter. That’s a lot of light-years!
     
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    Observable universe - Wikipedia

    The light-travel distance to the edge of the observable universe is the age of the universe times the speed of light, 13.8 billion light years. This is the distance that a photon emitted shortly after the Big Bang, such as one from the cosmic microwave background , has traveled to reach observers on Earth. 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

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    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 … 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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    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

    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

    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

     
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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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  10. The mystery of how big our Universe really is - BBC

    WEBWhen we look in any direction, the furthest visible regions of the Universe are estimated to be around 46 billion light years away. That's a diameter of 540 sextillion (or 54 followed by 22...

  11. The Observable Universe is 880 yottameters - Scale of Universe

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

    WEBOct 10, 2012 · From the time of the Big Bang to the era of recombination (when neutral hydrogen atoms formed) some 380,000 years later, the universe was opaque to light.

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