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  2. The observable universe is a ball-shaped region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion.

    Observable universe - Wikipedia

    en.wikipedia.org/wiki/Observable_universe
    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.

    Universe - Wikipedia

    en.wikipedia.org/wiki/Universe
     
  3. People also ask
    What is observable universe?Observable universe, the region of space that humans can actually or theoretically observe with the aid of technology. The observable universe, which can be thought of as a bubble with Earth at its centre, is differentiated from the entirety of the universe, which is the whole cosmic system of

    Observable universe | Definition, Size, Description, & Facts

    britannica.com
    What can you see in the observable universe?Everything you can see, and everything you could possibly see, right now, assuming your eyes could detect all types of radiations around you -- is the observable universe. In light, the farthest we can see comes from the cosmic microwave background, a time 13.8 billion years ago when the universe was opaque like thick fog.

    APOD: 2022 March 16 - The Observable Universe

    apod.nasa.gov
    Why are some parts of the universe not observable?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 observable universe. In the future, light from distant galaxies will have had more time to travel, so one might expect that additional regions will become observable.

    Observable universe - Wikipedia

    en.wikipedia.org
    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 ).

    Observable universe - Wikipedia

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    Wikipedia
    https://en.wikipedia.org/wiki/Observable_universe

    Observable universe - Wikipedia

    Number of galaxies and stars The observable universe contains as many as an estimated 2 trillion galaxies and, overall, as many as an estimated 10 stars – more stars (and, potentially, Earth-like planets) than all the grains of beach sand on planet Earth. As mentioned earlier, the estimated number of galaxies … See more

    Summary

    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 … See more

    Size

    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 … See more

    Most distant objects

    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 See more

    Overview

    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 … See more

    "The universe" versus "the observable universe"

    Both popular and professional research articles in cosmology often use the term "universe" to mean "observable universe". This can be … See more

    Large-scale structure

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

    See also

    • 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. Scientific American
    https://www.scientificamerican.com/article/the...

    The Universe Is Not Locally Real, and the Physics Nobel Prize …

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    Reddit - Dive into anything
    reddit.com
    What does it mean to say the universe is not locally real?
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  7. Britannica
    https://www.britannica.com/topic/observable-universe

    Observable universe | Definition, Size, Description, & Facts

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    Difference between the observable universe and the …
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    How big is the universe? | Space
    space.com
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  8. Science Mission Directorate
    https://science.nasa.gov/exoplanets/what-is-the-universe

    What is the Universe? - NASA Science

  9. nasa.gov
    https://apod.nasa.gov/apod/ap220316.html

    APOD: 2022 March 16 - The Observable Universe

  10. Discover Magazine
    https://www.discovermagazine.com/the-sciences/how...

    How Big Is the Observable Universe? | Discover Magazine

  11. Space.com
    https://www.space.com/24073-how-

    How big is the universe? | Space

  12. Britannica
    https://www.britannica.com/video/185559/lesson-universe-distinction

    Difference between the observable universe and the whole …

  13. Science Mission Directorate
    https://science.nasa.gov/missions/hubble/hubble...

    Hubble Reveals Observable Universe Contains 10 Times More

  14. BBC
    https://www.bbc.com/future/article/20210326-the...

    The mystery of how big our Universe really is - BBC

  15. NASA
    https://www.nasa.gov/news-release/nasa-reveals...

    NASA Reveals Webb Telescope’s First Images of Unseen Universe

  16. The Nine Planets
    https://nineplanets.org/questions/how-big-is-the-universe

    How Big is the Universe? | Size, Why So Big, Infinite & Facts

    The Milky Way Facts | Size, Information, History & DefinitionSep 24, 2020
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  17. Study.com
    https://study.com/academy/lesson/the-observable...

    Observable vs. Entire Universe | Overview, Size & Difference

  18. NASA Jet Propulsion Laboratory (JPL)
    https://www.jpl.nasa.gov/news/nasa-reveals-webb...

    NASA Reveals Webb Telescope’s First Images of Unseen Universe

  19. Forbes
    https://www.forbes.com/sites/startswithabang/2018/...

    Ask Ethan: How Large Is The Entire, Unobservable Universe?

  20. National Geographic
    https://www.nationalgeographic.com/science/article/...

    What is the multiverse—and is there any evidence it really exists?

  21. The Map of the Universe
    https://mapoftheuniverse.net

    The Map of the Universe

  22. Business Insider
    https://www.businessinsider.com/entire-universe...

    What the Entire Universe Looks Like in One Photo - Insider

  23. Star Walk
    https://starwalk.space/en/infographics/our-location-in-the-universe

    How Big Is The Universe | Observable Universe: Map, Size

  24. Forbes
    https://www.forbes.com/sites/startswithabang/2019/...

    How Much Of The Unobservable Universe Will We Someday Be …

  25. Yahoo
    https://www.yahoo.com/news/many-galaxies-universe...

    How many galaxies are in the universe? - Yahoo

  26. HubbleSite.org
    https://hubblesite.org/contents/news-releases/2024/...

    What Are Hubble and Webb Observing Right Now? NASA Tool …

  27. MSN
    https://www.msn.com/en-us/news/technology/10-mind...

    10 mind-blowing discoveries about the universe since Kepler's …

  28. RealClearScience
    https://www.realclearscience.com/articles/2024/08/...

    The Higgs Particle Could Have Ended the Universe by Now

  29. Business Insider
    https://www.businessinsider.com/photos-nasa...

    Photos From NASA's Chandra Space Telescope Reveal Invisible …

  30. SLAC National Accelerator Laboratory
    https://www6.slac.stanford.edu/events/2024-08-22...

    What’s the (dark) Matter with our Universe? Rubin Observatory is …

  31. Seeking Alpha
    https://seekingalpha.com/article/4710209-russell...

    For Some, The Russell Recon Is An Occasion For Derivatives

  32. Wizarding World
    https://www.wizardingworld.com/news/universal-epic...

    Universal Epic Universe reveals more details about The …

  33. CNN
    https://edition.cnn.com/2024/07/29/science/double...

    Two meteor showers are set to peak this week. Here’s how to …

  34. Financial Times
    https://www.ft.com/content/d48fa912-effb-4f82-9ae0-d3264b2b5a0f

    The height of luxury is a 6-metre, master-of-the universe ceiling

  35. Screen Rant
    https://screenrant.com/marvel-new-ultimate...

    Marvel Expands Ultimate Universe with New Titles and Real …

  36. Salon.com
    https://www.salon.com/2024/07/27/numbers-game-is...

    Is math the language of nature or just a human construct?

  37. New York Times
    https://www.nytimes.com/2024/07/21/opinion/biden...

    Opinion | Aaron Sorkin: How I Would Script This Moment for …

  38. The Economist
    https://www.economist.com/schools-brief/2024/07/30/...

    The race is on to control the global supply chain for AI chips

  39. nasa.gov
    https://apod.nasa.gov/apod/ap180508.html

    APOD: 2018 May 8 - The Observable Universe

  40. USA Today
    https://www.usatoday.com/story/entertainment/...

    Who is Doctor Doom? Robert Downey Jr.'s new MCU role …

  41. Bloomberg
    https://www.bloomberg.com/news/articles/2024-07-30/...

    Nouriel Roubini Is Looking to Launch His First ETF - Bloomberg

  42. Bloomberg
    https://www.bloomberg.com/news/articles/2024-07-21/...

    Stock Market Today: Dow, S&P Live Updates July 22 - Bloomberg