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- The observable universe is approximately 93 billion light-years in diameter12. A light-year, the distance light can travel in one Earth year, is 9.46 trillion kilometers (5.88 trillion miles)1. The observable universe can be thought of as a sphere that extends outwards from any observation point for 46.5 billion light-years3. However, there will be a limit to the observable universe’s radius, which is 62 billion light-years4.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.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-universeThe diameter of the observable universe is estimated at about 28 billion parsecs (93 billion light-years), putting the edge of the observable universe at about 46–47 billion light-years away.simple.wikipedia.org/wiki/Observable_universeThe observable universe can be thought of as a sphere that extends outwards from any observation point for 46.5 billion light-years, going farther back in time and more redshifted the deeper one looks.en.wikipedia.org/wiki/Shape_of_the_universeInterestingly, as the universe expands, the size of the observable portion will grow—but only up to a point. Gott and his colleagues showed that eventually there will be a limit to the observable universe’s radius: 62 billion light-years.www.pbs.org/wgbh/nova/article/how-large-is-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
Number of galaxies and stars
The observable universe contains as many as an estimated 2 trillion galaxies and, overall, as many … See moreThe 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
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 moreWikipedia text under CC-BY-SA license 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 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 …
Defining and measuring the observable universe and the whole …
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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...
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WEBThat's a diameter of 540 sextillion (or 54 followed by 22 zeros) miles. But this is really just our best guess – nobody knows exactly how big the Universe really is. That is because we can only...
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