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  2. Observable universe - Wikipedia

    en.wikipedia.org/wiki/Observable_universe

    The observable universe contains as many as an estimated 2 trillion galaxies [36] [37] [38] and, overall, as many as an estimated 10 24 stars [39] [40] – more stars (and, potentially, Earth-like planets) than all the grains of beach sand on planet Earth. [41] [42] [43] Other estimates are in the hundreds of billions rather than trillions.

  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. Timeline of knowledge about galaxies, clusters of galaxies ...

    en.wikipedia.org/wiki/Timeline_of_knowledge...

    2022 – JWST detects CEERS-93316, a candidate high-redshift galaxy, with an estimated redshift of approximately z = 16.7, corresponding to 235.8 million years [44] after the Big Bang. [45] If confirmed, it is one of the earliest and most distant known galaxies observed. [46]

  5. Supercluster - Wikipedia

    en.wikipedia.org/wiki/Supercluster

    The size of the complex of clusters may indicate a wall of galaxies exists there, instead of a single supercluster. The size discovered approaches the size of the CfA2 Great Wall filament. At the time of the discovery, it was the largest and most distant supercluster beyond z=0.5 [ 21 ] [ 22 ]

  6. Galaxy - Wikipedia

    en.wikipedia.org/wiki/Galaxy

    Galaxies are categorised according to their visual morphology as elliptical, [5] spiral, or irregular. [6] The Milky Way is an example of a spiral galaxy. It is estimated that there are between 200 billion [7] (2 × 10 11) to 2 trillion [8] galaxies in the observable universe.

  7. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    These lists contain the Sun, the planets, dwarf planets, many of the larger small Solar System bodies (which includes the asteroids), all named natural satellites, and a number of smaller objects of historical or scientific interest, such as comets and near-Earth objects. Many trans-Neptunian objects (TNOs) have been discovered; in many cases ...

  8. James Webb Space Telescope keeps finding galaxies that ... - AOL

    www.aol.com/james-webb-space-telescope-keeps...

    The James Webb Space Telescope keeps finding galaxies that shouldn’t exist, a scientist has warned. ... The Today Show. 140 fun trivia questions for kids (and answers) Sports. Sports.

  9. Outer space - Wikipedia

    en.wikipedia.org/wiki/Outer_space

    Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. [1] It contains ultra-low levels of particle densities , constituting a near-perfect vacuum [ 2 ] of predominantly hydrogen and helium plasma , permeated by electromagnetic radiation , cosmic rays , neutrinos , magnetic fields and dust .