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  2. Thus, we are surrounded by a "horizon" that we cannot look beyond—a horizon set by the distance that light can travel over the age of the universe. This horizon describes the visible universe—a region some 28 billion light years in diameter.

    www.pbs.org/wgbh/nova/article/how-big-universe/

    The radius of the observable universe is therefore estimated to be about 46.5 billion light-years and its diameter about 28.5 gigaparsecs (93 billion light-years, or 8.8 × 10 26 metres or 2.89 × 10 27 feet), which equals 880 yottametres.

    en.wikipedia.org/wiki/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.
    www.britannica.com/topic/observable-universe
     
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  5. WEBAug 19, 2020 · The exact size of the universe is impossible to calculate. However, the observable universe is around 93 billion light-years with …

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    • WEBSep 29, 2020 · How Many Galaxies are there in the Universe 2020? Currently, in 2020, it was estimated that there are around 2 trillion galaxies in the observable Universe. Each galaxy is unique, ranging in size from …

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    • WEBThe Universe. August 19, 2020 … Read more. Type Of Galaxies. January 4, 2021 January 8, 2020 … Read more. Spiral Galaxies. January 4, 2021 January 8, 2020 … Read more. Centaurus A. January 4, 2021 …

    • WEBDec 6, 2019 · Though it is the most massive and luminous star ever discovered, this does not mean it is the biggest in size. You can fit well over 4 billion Suns into R136a1. R136a1 produces about 58 times more …

    • WEBSize Comparison. Let's take a look at four examples of galaxies and their sizes. The Milky Way is a barred spiral galaxy, and it extends up to 100,000 light-years across. The Andromeda Galaxy is a spiral galaxy that is …

    • WEBAug 17, 2020 · Quasars are the brightest and most distant recorded objects in the visible Universe. The light emitted comes from the accretion disk around supermassive black holes. Key Facts & Summary

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      WEBSep 26, 2019 · It is often said that the Sun is an "ordinary" star. That's true in the sense that there are many others similar to it. But there are many more smaller stars than larger ones; the Sun is in the top 10% by mass. …

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