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  2. Observable universe - Wikipedia

    en.wikipedia.org/wiki/Observable_universe

    The universe's size is unknown, and it may be infinite in extent. [14] 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 ...

  3. List of galaxies - Wikipedia

    en.wikipedia.org/wiki/List_of_galaxies

    Size (left) and distance (right) of a few well-known galaxies put to scale. There are an estimated 100 billion galaxies in all of the observable universe. [1] On the order of 100,000 galaxies make up the Local Supercluster, and about 51 galaxies are in the Local Group (see list of nearest galaxies for a complete list).

  4. Universe - Wikipedia

    en.wikipedia.org/wiki/Universe

    The observable universe contains as many as an estimated 2 trillion galaxies [95] [96] [97] and, overall, as many as an estimated 10 24 stars [98] [99] – more stars (and earth-like planets) than all the grains of beach sand on planet Earth; [100] [101] [102] but less than the total number of atoms estimated in the universe as 10 82; [103] and ...

  5. Watch live: SpaceX launches satellites for US Space ... - AOL

    www.aol.com/watch-live-spacex-launches...

    SpaceX is hoping to launch satellites for the US Space Development Agency today (2 September), following a two-day delay. A Falcon 9 rocket carrying 13 military satellites will lift off from ...

  6. Green comet 2023 – live: How to see E3 in sky tonight before ...

    www.aol.com/news/green-comet-2023-live-best...

    They shared a stream of it on their YouTube channel, allowing anyone in the world to watch it for free. You can watch the live stream here: Nasa shares December image of green comet

  7. List of galaxy groups and clusters - Wikipedia

    en.wikipedia.org/wiki/List_of_galaxy_groups_and...

    Named for its size, El Gordo ("the fat one") is the biggest cluster found in the distant universe (at its distance and beyond), at the time of discovery in 2011, with a mass of 3 quadrillion suns. The second most massive galaxy cluster next to El Gordo is RCS2 J2327 , a galaxy cluster with the mass of 2 quadrillion suns.

  8. NASA's SPHEREx space telescope to explore what happened ... - AOL

    www.aol.com/news/nasas-spherex-space-telescope...

    The U.S. space agency's SPHEREx space telescope is tentatively scheduled to be launched on Friday aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California.

  9. List of largest cosmic structures - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_cosmic...

    Discovered through gamma-ray burst mapping. Largest-known regular formation in the observable universe. [8] Huge-LQG (2012–2013) 4,000,000,000 [9] [10] [11] Decoupling of 73 quasars. Largest-known large quasar group and the first structure found to exceed 3 billion light-years. "Giant Arc" (2021) 3,300,000,000 [12] Located 9.2 billion light ...