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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. The following is a list of notable galaxies.. There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.

  4. 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.

  5. Universe - Wikipedia

    en.wikipedia.org/wiki/Universe

    There are many competing ... The observable universe contains as many as an estimated 2 trillion galaxies ... and, overall, as many as an estimated 10 24 ...

  6. 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 [45] after the Big Bang. [46] If confirmed, it is one of the earliest and most distant known galaxies observed. [47]

  7. Milky Way - Wikipedia

    en.wikipedia.org/wiki/Milky_Way

    More recently, in November 2020, over 300 million habitable exoplanets are estimated to exist in the Milky Way Galaxy. [172] ... devoid of many galaxies, ...

  8. The best scientific arguments for why aliens exist - AOL

    www.aol.com/article/2015/09/28/the-best...

    It could be that our home galaxy, the Milky Way, is not an entirely hospitable galaxy for life, according to a scientific report last month that suggests other galaxies in the universe could host ...

  9. Lists of galaxies - Wikipedia

    en.wikipedia.org/wiki/Lists_of_galaxies

    Galaxies by type. List of spiral galaxies; List of ring galaxies; List of polar-ring galaxies; List of quasars; Galaxies by association. List of largest galaxies; List of nearest galaxies; Satellite galaxies of the Milky Way; Other characteristics. List of galaxies named after people; List of galaxies with richest globular cluster systems