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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).
Hubble volume, a spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of the universe, named after Edwin Hubble. KBC Void is an immense empty region of space, named after Ryan Keenan, Amy Barger, and Lennox Cowie.
Tod R. Lauer (1957–) catalogued massive black holes at galaxy centers and correlated their mass with other properties of the galaxies' structures; Georges Henri Lemaître (1894–1966) proposed the big bang theory and the distance-redshift relation; Janna Levin (1967–) seeks evidence for a bounded universe of nontrivial topology
This is a list of people claimed to be immortal. This list does not reference purely spiritual entities (spirits, gods, demons, angels), non-humans (monsters, aliens, elves), or artificial life (artificial intelligence, robots). This list comprises people claimed to achieve a deathless existence on Earth.
List of Solar System objects most distant from the Sun; List of Solar System objects by size; Lists of geological features of the Solar System; List of natural satellites (moons) Lists of small Solar System bodies; Lists of comets; List of meteor showers; Minor planets. List of minor planets. List of exceptional asteroids; List of minor planet ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 16 February 2025. Hypothetical group of multiple universes Not to be confused with Metaverse. "Multiverses" redirects here. Not to be confused with MultiVersus. For other uses, see Multiverse (disambiguation). Part of a series on Physical cosmology Big Bang · Universe Age of the universe Chronology of ...
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The following is a list of astronomers, astrophysicists and other notable people who have made contributions to the field of astronomy.They may have won major prizes or awards, developed or invented widely used techniques or technologies within astronomy, or are directors of major observatories or heads of space-based telescope projects.