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Encyclopedia > Dwarf galaxy

A dwarf galaxy is a small galaxy composed of up to several billion stars, a small number compared to our own Milky Way's 200-400 billion stars. The Large Magellanic Cloud, containing over 30 billion stars, is sometimes classified as a dwarf galaxy while others consider it a full-fledged galaxy going around the Milky Way galaxy. NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 17,000 parsecs in diameter and approximately 20 million parsecs distant. ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... The Milky Way as seen from Death Valley The Milky Way is the galaxy where the Solar System (and the Earth) is located. ... The Large Magellanic Cloud (LMC for short) is a dwarf galaxy that orbits our own galaxy, the Milky Way. ...


There are many dwarf galaxies in the Local Group: these small galaxies frequently orbit around larger galaxies, such as the Milky Way, the Andromeda Galaxy and the Triangulum Galaxy. A member of the Local Group of galaxies, irregular galaxy Sextans A is 4. ... The Milky Way as seen from Death Valley The Milky Way is the galaxy where the Solar System (and the Earth) is located. ... M31 in a small telescope The Andromeda Galaxy (IPA: , also known as Messier 31, M31, or NGC 224; older texts often called it the Andromeda Nebula) is a spiral galaxy approximately 2. ... The Triangulum Galaxy (also known as Messier 33 or NGC 598) is a spiral galaxy about 3. ...


The Milky Way has 14 known dwarf galaxies orbiting it. See Milky Way for more information. The Milky Way as seen from Death Valley The Milky Way is the galaxy where the Solar System (and the Earth) is located. ...


Dwarf galaxies come in many different morphologies: Astronomers classify galaxies based on their overall shape (elliptical, spiral or barred spiral) and further by the specific properties of the individual galaxy (for example degree of ellipse, number of spirals or definition of bar). ...

The recently coined term, hobbit galaxy has been used to describe galaxies smaller and dimmer than dwarf galaxies.[1],[2] An elliptical galaxy is a type of galaxy in the Hubble sequence characterized by the following physical properties: The giant elliptical galaxy NGC 4881 (the spherical glow at upper left) lies at the edge of the Coma Cluster of Galaxies. ... Dwarf elliptical galaxies are elliptical galaxies that are much smaller than others, classified as dE. They are quite common, and are usually companions to other galaxies. ... Dwarf spheroidal galaxy (dSph) is a term in astronomy applied to the nine low luminosity dwarf elliptical galaxies that are companions to the Milky Way and to the similar systems that are companions to the Andromeda Galaxy M31. ... This article or section does not adequately cite its references or sources. ... A Dwarf irregular galaxy is a galaxy that is classified as both a dwarf and an irregular galaxy, typically labeled as dI. ‹The stub template below has been proposed for renaming to astronomy-stub. ... It has been suggested that spiral nebula be merged into this article or section. ... A dwarf spiral galaxy is the dwarf version of a spiral galaxy. ...


Partial list of dwarf galaxies

The Aquarius Dwarf galaxy is a dwarf galaxy and an irregular galaxy, that was first catalogued in 1966 by the DDO survey. ... The Canis Major Dwarf Galaxy is located in the same part of the sky as the constellation of Canis Major. ... I Zwicky 18 is a galaxy 45 million light years away. ... Irregular Galaxy IC 10. ... The Large Magellanic Cloud (LMC for short) is a dwarf galaxy that orbits our own galaxy, the Milky Way. ... NGC 1569 is an irregular galaxy and dwarf galaxy in Camelopardalis that was discovered by William Herschel on November 4, 1788. ... NGC 1705, courtesy of NASA NGC 1705 is an irregular galaxy and dwarf galaxy about 2,000 lightyears across and part of the Pictor Constellation. ... The Pegasus Dwarf Irregular Galaxy (also known as UGC 12613, DDO 216, A2304, Peg DIG, or the Pegasus Dwarf) is an irregular galaxy and a dwarf galaxy in the Pegasus constellation. ... The Phoenix Dwarf Galaxy is a dwarf galaxy and an irregular galaxy that was discovered in 1976 by H.E. Schuster and R.M. West and mistaken for a globular cluster. ... The Sagittarius Dwarf Elliptical Galaxy (Sag DEG) is a satellite galaxy of the Milky Way Galaxy. ... The Sagittarius Dwarf Irregular Galaxy or SagDIG is a dwarf galaxy in the constellation of Sagittarius. ... for SDIG, see Sculptor Dwarf Irregular Galaxy The Sculptor Dwarf Galaxy (also called E351-G30, PGC 3589, A0058, Sculptor Dwarf Spheroidal Galaxy) is a dwarf spheroidal galaxy in the Local Group that is a satellite of the Milky Way in the direction of the constellation of Sculptor. ... The Sculptor Dwarf Irregular Galaxy (SDIG) —also known as ESO 349-G31 or PGC 621— is an irregular galaxy in the Sculptor group of galaxies. ... It has been suggested that this article or section be merged with Sextans Dwarf Spheroidal. ... Sextans Dwarf on November 3, 1998 The Sextans Dwarf is a dwarf galaxy that was discovered in 1990 by Mike Irwin, M.T. Bridgeland, P.S. Bunclark and R.G. McMahon as the 8th satellite of the Milky Way [1], and is named fittingly, as it is part of Sextans... The Small Magellanic Cloud (SMC) is a dwarf galaxy[1] in orbit around the Milky Way Galaxy. ... The Tucana Dwarf Galaxy is a dwarf galaxy in the constellation Tucana. ... The Ursa Minor Dwarf dwarf galaxy was discovered by A.G. Wilson of the Lowell Observatory in 1954. ... Willman 1 or SDSS J1049+5103[2] is an extreme globular cluster or ultra low-mass dwarf galaxy discovered by a team lead by Beth Willman of New York University, using Sloan Digital Sky Survey data. ... The Carina Dwarf is a dwarf galaxy in the Carina constellation. ... The Draco Dwarf galaxy was discovered by Albert G. Wilson of Lowell Observatory in 1954. ... The Fornax Dwarf is a dwarf galaxy in the constellation Fornax that was discovered in 1938 by Harlow Shapley. ...

See also

Astronomers classify galaxies based on their overall shape (elliptical, spiral or barred spiral) and further by the specific properties of the individual galaxy (for example degree of ellipse, number of spirals or definition of bar). ... The reader should be aware that there are certain unavoidable difficulties with this list. ...

External links

Wikimedia Commons has media related to:
Category:Dwarf galaxies
  • Milky Way Satellite Galaxies
  • SPACE.com article on "hobbit galaxies"
  • Science article on "hobbit galaxies"

  Results from FactBites:
 
Dwarf galaxy has giant surprise (560 words)
As part of a study of such galaxies, she had earlier made a visible-light image of it at Kitt Peak National Observatory in Arizona.
When she observed the galaxy later using the radio telescope, she found that it is embedded in a huge disk of atomic hydrogen gas.
A few other dwarf galaxies have large gas disks, but unlike these, UGC 5288's disk shows no signs that the gas was either blown out of the galaxy by furious star formation or pulled out by a close encounter with another galaxy.
Galaxy - Wikipedia, the free encyclopedia (2438 words)
Most galaxies are several thousand to several hundred thousand light years in diameter and are usually separated from one another by distances on the order of millions of light years.
Dwarf galaxies may also be classified as elliptical, spiral or irregular.
The galaxy will continue to absorb infalling material from high velocity clouds and dwarf galaxies throughout its life; the cycle of stellar birth and death will increase the abundance of heavy elements, eventually allowing the formation of planets.
  More results at FactBites »

 
 

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