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Dwarf galaxy

Index Dwarf galaxy

A dwarf galaxy is a small galaxy composed of about 100 million up to several billion stars, a small number compared to the Milky Way's 200–400 billion stars. [1]

87 relations: Abell 1689, Andromeda Galaxy, Aquarius Dwarf, Astronomical Society of the Pacific, Astronomy, Astronomy & Astrophysics, Black hole, Blue, Canis Major Overdensity, Carina Dwarf Spheroidal Galaxy, Coma Cluster, Constellation, Crater 2 Dwarf Galaxy, Dark matter, Draco Dwarf, Dwarf elliptical galaxy, Dwarf spheroidal galaxy, Dwarf spiral galaxy, Effective radius, Elliptical galaxy, Eridanus II, Fornax Cluster, Fornax Dwarf, Galactic tide, Galaxy, Galaxy merger, Galaxy morphological classification, GALEX, Göttingen Observatory, Globular cluster, Helium, Hen 2-10, Hydrogen, I Zw 36, I Zwicky 18, IC 10, Interacting galaxy, Irregular galaxy, Large Magellanic Cloud, Lenticular galaxy, Leo (constellation), Leo I (dwarf galaxy), Leo II (dwarf galaxy), Leo Ring, List of nearest galaxies, Local Group, M59-UCD3, M60-UCD1, Magellanic spiral, Metallicity, ..., Milky Way, Monthly Notices of the Royal Astronomical Society, NASA, National Geographic Society, NGC 1569, NGC 1705, NGC 2915, Omega Centauri, Parsec, Pea galaxy, Pegasus Dwarf Irregular Galaxy, Phoenix Dwarf, Publications of the Astronomical Society of Australia, Sagittarius Dwarf Irregular Galaxy, Sagittarius Dwarf Spheroidal Galaxy, Science Daily, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Sextans A, Sextans Dwarf Spheroidal, Small Magellanic Cloud, Space probe, Spiral galaxy, Star, Star cluster, Star formation, Supermassive black hole, The Astronomical Journal, The Astrophysical Journal, The Sydney Morning Herald, Triangulum Galaxy, Tucana Dwarf, University of Porto, Ursa Minor Dwarf, Virgo Cluster, Wide-field Infrared Survey Explorer, Willman 1. Expand index (37 more) »

Abell 1689

Abell 1689 is a galaxy cluster in the constellation Virgo nearly 2.2 billion light-years away.

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Andromeda Galaxy

The Andromeda Galaxy, also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way.

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Aquarius Dwarf

The Aquarius Dwarf is a dwarf irregular galaxy, first catalogued in 1959 by the DDO survey.

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Astronomical Society of the Pacific

The Astronomical Society of the Pacific (ASP) is an American scientific and educational organization, founded in San Francisco on February 7, 1889.

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Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

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Astronomy & Astrophysics

Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.

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Black hole

A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.

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Blue

Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model.

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Canis Major Overdensity

The Canis Major Dwarf Galaxy (CMa Dwarf) or Canis Major Overdensity (CMa Overdensity) is a disputed dwarf irregular galaxy in the Local Group, located in the same part of the sky as the constellation Canis Major.

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Carina Dwarf Spheroidal Galaxy

The Carina Dwarf Spheroidal Galaxy is a dwarf galaxy in the Carina constellation.

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Coma Cluster

The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies.

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Constellation

A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.

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Crater 2 Dwarf Galaxy

Crater 2 is a dwarf galaxy discovered orbiting the Milky Way, located approximately 380,000 ly from Earth.

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Dark matter

Dark matter is a theorized form of matter that is thought to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density.

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Draco Dwarf

The Draco Dwarf is a spheroidal galaxy which was discovered by Albert George Wilson of Lowell Observatory in 1954 on photographic plates of the National Geographic Society's Palomar Observatory Sky Survey (POSS).

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Dwarf elliptical galaxy

Dwarf elliptical galaxies, or dEs, are elliptical galaxies that are smaller than ordinary elliptical galaxies.

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Dwarf spheroidal galaxy

A dwarf spheroidal galaxy (dSph) is a term in astronomy applied to small, low-luminosity galaxies with very little dust and an older stellar population.

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Dwarf spiral galaxy

A dwarf spiral galaxy is the dwarf version of a spiral galaxy.

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Effective radius

The effective radius (R_e) of a galaxy is the radius at which half of the total light of the system is emitted.

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Elliptical galaxy

An elliptical galaxy is a type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless image.

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Eridanus II

The Eridanus II Dwarf is a low-surface brightness dwarf galaxy in the constellation Eridanus.

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Fornax Cluster

The Fornax Cluster is a cluster of galaxies lying at a distance of 19 megaparsecs (62 million light-years).

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Fornax Dwarf

The Fornax Dwarf Spheroidal is an elliptical dwarf galaxy in the constellation Fornax that was discovered in 1938 by Harlow Shapley.

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Galactic tide

A galactic tide is a tidal force experienced by objects subject to the gravitational field of a galaxy such as the Milky Way.

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Galaxy

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.

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Galaxy merger

Galaxy mergers can occur when two (or more) galaxies collide.

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Galaxy morphological classification

Galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance.

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GALEX

The Galaxy Evolution Explorer (GALEX) is an orbiting ultraviolet space telescope launched on April 28, 2003, and operated until early 2012.

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Göttingen Observatory

Göttingen Observatory (Universitätssternwarte Göttingen (Göttingen University Observatory) or königliche Sternwarte Göttingen (Royal Observatory Göttingen)) is a German astronomical observatory located in Göttingen, Lower Saxony, Germany.

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Globular cluster

A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.

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Helium

Helium (from lit) is a chemical element with symbol He and atomic number 2.

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Hen 2-10

Hen 2-10, also known as He 2-10 and Henize 2-10, is a dwarf starburst galaxy located 34 million light years away in the constellation of Pyxis.

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Hydrogen

Hydrogen is a chemical element with symbol H and atomic number 1.

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I Zw 36

I Zwicky 36, often abbreviated to I Zw 36, is a blue compact dwarf galaxy which is in the constellation Canes Venatici.

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I Zwicky 18

I Zwicky 18 is a dwarf irregular galaxy located about 59 million light years away in the constellation Ursa Major.

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IC 10

IC 10 is an irregular galaxy in the constellation Cassiopeia.

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Interacting galaxy

Interacting galaxies (colliding galaxies) are galaxies whose gravitational fields result in a disturbance of one another.

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Irregular galaxy

An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy.

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Large Magellanic Cloud

The Large Magellanic Cloud (LMC) is a satellite galaxy of the Milky Way.

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Lenticular galaxy

A lenticular galaxy (denoted S0) is a type of galaxy intermediate between an elliptical (denoted E) and a spiral galaxy in galaxy morphological classification schemes.

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Leo (constellation)

Leo is one of the constellations of the zodiac, lying between Cancer the crab to the west and Virgo the maiden to the east.

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Leo I (dwarf galaxy)

Leo I is a dwarf spheroidal galaxy in the constellation Leo.

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Leo II (dwarf galaxy)

Leo II (or Leo B) is a dwarf spheroidal galaxy about 690,000 light-years away in the constellation Leo.

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Leo Ring

The Leo Ring is an immense intergalactic cloud of hydrogen and helium gas some in diameter, in orbit of two galaxies, in the center of the Leo Group of galaxies, within the constellation of Leo.

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List of nearest galaxies

This is a list of known galaxies within 3.59 megaparsecs (11.7 million light-years) of the Solar System, in ascending order of distance.

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Local Group

The Local Group is the galaxy group that includes the Milky Way.

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M59-UCD3

M59-UCD3 is an ultra-compact dwarf galaxy located near the Messier 59 galaxy.

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M60-UCD1

M60-UCD1 is an ultracompact dwarf galaxy.

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Magellanic spiral

Magellanic spiral galaxies are (usually) dwarf galaxies which are classified as the type Sm (and SAm, SBm, SABm).

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Metallicity

In astronomy, metallicity is used to describe the abundance of elements present in an object that are heavier than hydrogen or helium.

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Milky Way

The Milky Way is the galaxy that contains our Solar System.

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Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.

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NASA

The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.

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National Geographic Society

The National Geographic Society (NGS), headquartered in Washington, D.C., United States, is one of the largest non-profit scientific and educational institutions in the world.

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NGC 1569

The NGC 1569 is a dwarf irregular galaxy in Camelopardalis.

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NGC 1705

NGC 1705 is a peculiar lenticular galaxy and a blue compact dwarf galaxy in the constellation Pictor, undergoing a starburst.

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NGC 2915

NGC 2915 is a blue dwarf galaxy located 12 million light-years away in the southern constellation Chamaeleon, right on the edge of the Local Group.

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Omega Centauri

Omega Centauri (ω Cen or NGC 5139) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677.

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Parsec

The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.

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Pea galaxy

A Pea galaxy, also referred to as a Pea or Green Pea, might be a type of Luminous Blue Compact Galaxy which is undergoing very high rates of star formation.

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Pegasus Dwarf Irregular Galaxy

The Pegasus Dwarf Irregular Galaxy (also known as Peg DIG or the Pegasus Dwarf) is a dwarf irregular galaxy in the direction of the constellation Pegasus.

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Phoenix Dwarf

The Phoenix Dwarf is a dwarf irregular galaxy discovered in 1976 by Hans-Emil Schuster and Richard Martin West and mistaken for a globular cluster.

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Publications of the Astronomical Society of Australia

Publications of the Astronomical Society of Australia is a peer-reviewed scientific journal covering all aspects of astrophysics and astronomy.

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Sagittarius Dwarf Irregular Galaxy

The Sagittarius Dwarf Irregular Galaxy or SagDIG is a dwarf galaxy in the constellation of Sagittarius.

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Sagittarius Dwarf Spheroidal Galaxy

The Sagittarius Dwarf Spheroidal Galaxy (Sgr dSph), also known as the Sagittarius Dwarf Elliptical Galaxy (Sgr dE or Sag DEG), is an elliptical loop-shaped satellite galaxy of the Milky Way.

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Science Daily

Science Daily is an American website that aggregates press releases and publishes lightly edited press releases (a practice called churnalism) about science, similar to Phys.org and EurekAlert!.

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Sculptor Dwarf Galaxy

The Sculptor Dwarf Galaxy (also known as Sculptor Dwarf Elliptical Galaxy or the Sculptor Dwarf Spheroidal Galaxy) is a dwarf spheroidal galaxy that is a satellite of the Milky Way.

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Sculptor Dwarf Irregular Galaxy

The Sculptor Dwarf Irregular Galaxy (SDIG) is an irregular galaxy in the constellation Sculptor.

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Sextans A

Sextans A (also known as UGCA 205) is a tiny dwarf irregular galaxy.

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Sextans Dwarf Spheroidal

The Sextans Dwarf Spheroidal is a dwarf spheroidal galaxy that was discovered in 1990 by Mike Irwin as the 8th satellite of the Milky Way, located in the constellation of Sextans.

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Small Magellanic Cloud

The Small Magellanic Cloud (SMC), or Nubecula Minor, is a dwarf galaxy near the Milky Way.

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Space probe

A space probe is a robotic spacecraft that does not orbit the Earth, but, instead, explores further into outer space.

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Spiral galaxy

Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae(pp. 124–151) and, as such, form part of the Hubble sequence.

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Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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Star cluster

Star clusters are groups of stars.

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Star formation

Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars.

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Supermassive black hole

A supermassive black hole (SMBH or SBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses, and is found in the centre of almost all currently known massive galaxies.

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The Astronomical Journal

The Astronomical Journal (often abbreviated AJ in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society and currently published by IOP Publishing.

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The Astrophysical Journal

The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.

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The Sydney Morning Herald

The Sydney Morning Herald (SMH) is a daily compact newspaper published by Fairfax Media in Sydney, Australia.

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Triangulum Galaxy

The Triangulum Galaxy is a spiral galaxy approximately 3 million light-years (ly) from Earth in the constellation Triangulum.

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Tucana Dwarf

The Tucana Dwarf Galaxy is a dwarf galaxy in the constellation Tucana.

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University of Porto

The University of Porto (Universidade do Porto) is a Portuguese public university located in Porto, and founded on 22 March 1911.

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Ursa Minor Dwarf

The Ursa Minor Dwarf is a dwarf spheroidal galaxy, discovered by A.G. Wilson of the Lowell Observatory, in the United States, during the Palomar Sky Survey in 1955.

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Virgo Cluster

The Virgo Cluster is a cluster of galaxies whose center is 53.8 ± 0.3 Mly (16.5 ± 0.1 Mpc) away in the constellation Virgo.

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Wide-field Infrared Survey Explorer

Wide-field Infrared Survey Explorer (WISE) is a NASA infrared-wavelength astronomical space telescope launched in December 2009, and placed in hibernation in February 2011.

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Willman 1

Willman 1 is an ultra low-luminosity dwarf galaxy or a star cluster.

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Redirects here:

BCD galaxies, BCD galaxy, Blue compact dwarf, Blue compact dwarf galaxies, Blue compact dwarf galaxy, Dwarf Galaxy, Dwarf galaxies, Hobbit Galaxy, UCD galaxies, UCD galaxy, Ultra compact dwarf, Ultra compact dwarf galaxies, Ultra compact dwarf galaxy, Ultra compact dwarfs, Ultra-compact dwarf, Ultra-compact dwarf galaxies, Ultra-compact dwarf galaxy, Ultra-compact dwarfs, Ultracompact dwarf, Ultracompact dwarf galaxies, Ultracompact dwarf galaxy, Ultracompact dwarfs.

References

[1] https://en.wikipedia.org/wiki/Dwarf_galaxy

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