Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
 

Outline of galaxies

Index Outline of galaxies

The following outline is provided as an overview of and topical guide to galaxies: Galaxies – gravitationally bound systems of stars, stellar remnants, interstellar gas, dust, and dark matter. [1]

122 relations: Active galactic nucleus, Andromeda–Milky Way collision, Anemic galaxy, Astronomical object, Astronomy, Astrophysics, Atlas of Peculiar Galaxies, Barred irregular galaxy, Barred lenticular galaxy, Barred spiral galaxy, Blazar, Brightest cluster galaxy, Bulge (astronomy), Carina–Sagittarius Arm, Catalogue of Galaxies and Clusters of Galaxies, Cosmology, Cosmos Redshift 7, Dark galaxy, Dark matter halo, David Dunlap Observatory Catalogue, Disc galaxy, Dwarf elliptical galaxy, Dwarf galaxy, Dwarf spheroidal galaxy, Dwarf spiral galaxy, Edwin Hubble, Elliptical galaxy, Extragalactic astronomy, Faint blue galaxy, Field galaxy, Flocculent spiral galaxy, Galactic astronomy, Galactic Center, Galactic coordinate system, Galactic corona, Galactic Disc, Galactic habitable zone, Galactic halo, Galactic orientation, Galactic plane, Galactic quadrant, Galactic ridge, Galactic tide, Galactic year, Galaxy, Galaxy cluster, Galaxy color–magnitude diagram, Galaxy filament, Galaxy formation and evolution, Galaxy group, ..., Galaxy groups and clusters, Galaxy merger, Galaxy morphological classification, Galaxy rotation curve, Galileo Galilei, Grand design spiral galaxy, Hot, dust-obscured galaxy, Hubble's law, Illustris project, Interacting galaxy, Intergalactic dust, Intergalactic star, Intergalactic travel, Intermediate spiral galaxy, Interstellar medium, Irregular galaxy, Jellyfish galaxy, Lenticular galaxy, List of galaxies, List of galaxies named after people, List of galaxy groups and clusters, List of nearest galaxies, List of polar-ring galaxies, List of quasars, List of ring galaxies, List of spiral galaxies, List of voids, Lists of galaxies, Local Group, Low-ionization nuclear emission-line region, Low-surface-brightness galaxy, Luminous infrared galaxy, Lyman-alpha emitter, Lyon-Meudon Extragalactic Database, Magellanic spiral, Markarian galaxies, Milky Way, Morphological Catalogue of Galaxies, Multiwavelength Atlas of Galaxies, Norma Arm, Orion Arm, Outline (list), Pea galaxy, Peculiar galaxy, Perseus Arm, Physical cosmology, Polar-ring galaxy, Principal Galaxies Catalogue, Protogalaxy, Quasar, Radio galaxy, Ring galaxy, Sagittarius A*, Satellite galaxy, Scutum–Centaurus Arm, Seyfert galaxy, Shapley-Ames Catalog, Spiral galaxy, Starburst galaxy, Supercluster, Supermassive black hole, Type-cD galaxy, Ultra diffuse galaxy, Unbarred lenticular galaxy, Unbarred spiral galaxy, University of Ottawa, University of St Andrews, Uppsala General Catalogue, Void (astronomy), Void galaxy, Vorontsov-Vel'yaminov Interacting Galaxies, X-shaped radio galaxy. Expand index (72 more) »

Active galactic nucleus

An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion—and possibly all—of the electromagnetic spectrum, with characteristics indicating that the excess luminosity is not produced by stars.

New!!: Outline of galaxies and Active galactic nucleus · See more »

Andromeda–Milky Way collision

The Andromeda–Milky Way collision is a galactic collision predicted to occur in about 4 billion years between two galaxies in the Local Group—the Milky Way (which contains the Solar System and Earth) and the Andromeda Galaxy.

New!!: Outline of galaxies and Andromeda–Milky Way collision · See more »

Anemic galaxy

An anemic galaxy is a type of spiral galaxy characterized by a low contrast between its spiral arms and its disk.

New!!: Outline of galaxies and Anemic galaxy · See more »

Astronomical object

An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.

New!!: Outline of galaxies and Astronomical object · See more »

Astronomy

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

New!!: Outline of galaxies and Astronomy · See more »

Astrophysics

Astrophysics is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the astronomical objects, rather than their positions or motions in space".

New!!: Outline of galaxies and Astrophysics · See more »

Atlas of Peculiar Galaxies

The Atlas of Peculiar Galaxies is a catalog of peculiar galaxies produced by Halton Arp in 1966.

New!!: Outline of galaxies and Atlas of Peculiar Galaxies · See more »

Barred irregular galaxy

A barred irregular galaxy is an irregular version of a barred spiral galaxy.

New!!: Outline of galaxies and Barred irregular galaxy · See more »

Barred lenticular galaxy

A barred lenticular galaxy is a lenticular version of a barred spiral galaxy.

New!!: Outline of galaxies and Barred lenticular galaxy · See more »

Barred spiral galaxy

A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars.

New!!: Outline of galaxies and Barred spiral galaxy · See more »

Blazar

A blazar is a very compact quasar (quasi-stellar radio source) associated with a presumed supermassive black hole at the center of an active, giant elliptical galaxy.

New!!: Outline of galaxies and Blazar · See more »

Brightest cluster galaxy

A brightest cluster galaxy (BCG) is defined as the brightest galaxy in a cluster of galaxies.

New!!: Outline of galaxies and Brightest cluster galaxy · See more »

Bulge (astronomy)

In astronomy, a bulge is a tightly packed group of stars within a larger formation.

New!!: Outline of galaxies and Bulge (astronomy) · See more »

Carina–Sagittarius Arm

The Carina–Sagittarius Arm (also known as Sagittarius Arm or Sagittarius–Carina Arm, labeled -I) is generally thought to be a minor spiral arm of the Milky Way galaxy.

New!!: Outline of galaxies and Carina–Sagittarius Arm · See more »

Catalogue of Galaxies and Clusters of Galaxies

The Catalogue of Galaxies and of Clusters of Galaxies (pr CGCG) was compiled by Fritz Zwicky in 1961–68.

New!!: Outline of galaxies and Catalogue of Galaxies and Clusters of Galaxies · See more »

Cosmology

Cosmology (from the Greek κόσμος, kosmos "world" and -λογία, -logia "study of") is the study of the origin, evolution, and eventual fate of the universe.

New!!: Outline of galaxies and Cosmology · See more »

Cosmos Redshift 7

Cosmos Redshift 7 (also known as COSMOS Redshift 7, Galaxy Cosmos Redshift 7, Galaxy CR7 or CR7) is a high-redshift Lyman-alpha emitter galaxy (meaning CR7 is one of the oldest, most distant galaxies), in the constellation Sextans, about 12.9 billion light travel distance years from Earth, reported to contain the first stars (first generation; Population III)—formed soon after the Big Bang during the reionisation epoch (redshift, z ∼ 6−7), when the Universe was about 800 million years old—to have provided the chemical elements (like oxygen, nitrogen, carbon, calcium and iron) needed for the later formation of planets and life as it is known.

New!!: Outline of galaxies and Cosmos Redshift 7 · See more »

Dark galaxy

A dark galaxy is a hypothesized galaxy with no, or very few, stars.

New!!: Outline of galaxies and Dark galaxy · See more »

Dark matter halo

A dark matter halo is a hypothetical component of a galaxy that envelops the galactic disc and extends well beyond the edge of the visible galaxy.

New!!: Outline of galaxies and Dark matter halo · See more »

David Dunlap Observatory Catalogue

David Dunlap Observatory Catalogue, known as the DDO or A Catalogue of Dwarf Galaxies, is a catalogue of dwarf galaxies that was published in 1959 (and later expanded in 1966) by Sidney van den Bergh.

New!!: Outline of galaxies and David Dunlap Observatory Catalogue · See more »

Disc galaxy

A disc galaxy is a galaxy characterized by a disc, a flattened circular volume of stars.

New!!: Outline of galaxies and Disc galaxy · See more »

Dwarf elliptical galaxy

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

New!!: Outline of galaxies and Dwarf elliptical galaxy · See more »

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.

New!!: Outline of galaxies and Dwarf galaxy · See more »

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.

New!!: Outline of galaxies and Dwarf spheroidal galaxy · See more »

Dwarf spiral galaxy

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

New!!: Outline of galaxies and Dwarf spiral galaxy · See more »

Edwin Hubble

Edwin Powell Hubble (November 20, 1889 – September 28, 1953) was an American astronomer.

New!!: Outline of galaxies and Edwin Hubble · See more »

Elliptical galaxy

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

New!!: Outline of galaxies and Elliptical galaxy · See more »

Extragalactic astronomy

Extragalactic astronomy is the branch of astronomy concerned with objects outside the Milky Way galaxy.

New!!: Outline of galaxies and Extragalactic astronomy · See more »

Faint blue galaxy

The faint blue galaxy (F.B.G.) problem in astrophysics first arose with observations starting in 1978 that there were more galaxies with a bolometric magnitude > 22 than then-current theory predicted.

New!!: Outline of galaxies and Faint blue galaxy · See more »

Field galaxy

A field galaxy is a galaxy that does not belong to a larger cluster of galaxies and hence is gravitationally alone.

New!!: Outline of galaxies and Field galaxy · See more »

Flocculent spiral galaxy

A flocculent spiral galaxy is a type of spiral galaxy.

New!!: Outline of galaxies and Flocculent spiral galaxy · See more »

Galactic astronomy

Galactic astronomy is the study of the Milky Way galaxy and all its contents.

New!!: Outline of galaxies and Galactic astronomy · See more »

Galactic Center

The Galactic Center is the rotational center of the Milky Way.

New!!: Outline of galaxies and Galactic Center · See more »

Galactic coordinate system

The galactic coordinate system is a celestial coordinate system in spherical coordinates, with the Sun as its center, the primary direction aligned with the approximate center of the Milky Way galaxy, and the fundamental plane parallel to an approximation of the galactic plane but offset to its north.

New!!: Outline of galaxies and Galactic coordinate system · See more »

Galactic corona

The terms galactic corona and gaseous corona have been used in the first decade of the 21st century to describe a hot, ionised, gaseous component in the Galactic halo of the Milky Way.

New!!: Outline of galaxies and Galactic corona · See more »

Galactic Disc

The Galactic Disc is a component of disc galaxies, such as spiral galaxies and lenticular galaxies.

New!!: Outline of galaxies and Galactic Disc · See more »

Galactic habitable zone

In astrobiology and planetary astrophysics, the galactic habitable zone is the region of a galaxy in which life might most likely develop.

New!!: Outline of galaxies and Galactic habitable zone · See more »

Galactic halo

A galactic halo is an extended, roughly spherical component of a galaxy which extends beyond the main, visible component.

New!!: Outline of galaxies and Galactic halo · See more »

Galactic orientation

Galactic clusters are gravitationally bound large-scale structures of multiple galaxies.

New!!: Outline of galaxies and Galactic orientation · See more »

Galactic plane

The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies.

New!!: Outline of galaxies and Galactic plane · See more »

Galactic quadrant

A galactic quadrant, or quadrant of the Galaxy, is one of four circular sectors in the division of the Milky Way Galaxy.

New!!: Outline of galaxies and Galactic quadrant · See more »

Galactic ridge

The galactic ridge is a region of the inner galaxy that is coincident with the galactic plane of the Milky Way.

New!!: Outline of galaxies and Galactic ridge · See more »

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.

New!!: Outline of galaxies and Galactic tide · See more »

Galactic year

The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy.

New!!: Outline of galaxies and Galactic year · See more »

Galaxy

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

New!!: Outline of galaxies and Galaxy · See more »

Galaxy cluster

A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 1014–1015 solar masses.

New!!: Outline of galaxies and Galaxy cluster · See more »

Galaxy color–magnitude diagram

The galaxy color–magnitude diagram shows the relationship between absolute magnitude (a measure of luminosity) and mass of galaxies.

New!!: Outline of galaxies and Galaxy color–magnitude diagram · See more »

Galaxy filament

The distribution reveals fine, filamentary structures.

New!!: Outline of galaxies and Galaxy filament · See more »

Galaxy formation and evolution

The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies.

New!!: Outline of galaxies and Galaxy formation and evolution · See more »

Galaxy group

A galaxy group or group of galaxies (GrG) is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way (about 1010 times the luminosity of the Sun); collections of galaxies larger than groups that are first-order clustering are called galaxy clusters.

New!!: Outline of galaxies and Galaxy group · See more »

Galaxy groups and clusters

Galaxy groups and clusters are the largest known gravitationally bound objects to have arisen thus far in the process of cosmic structure formation.

New!!: Outline of galaxies and Galaxy groups and clusters · See more »

Galaxy merger

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

New!!: Outline of galaxies and Galaxy merger · See more »

Galaxy morphological classification

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

New!!: Outline of galaxies and Galaxy morphological classification · See more »

Galaxy rotation curve

The rotation curve of a disc galaxy (also called a velocity curve) is a plot of the orbital speeds of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre.

New!!: Outline of galaxies and Galaxy rotation curve · See more »

Galileo Galilei

Galileo Galilei (15 February 1564Drake (1978, p. 1). The date of Galileo's birth is given according to the Julian calendar, which was then in force throughout Christendom. In 1582 it was replaced in Italy and several other Catholic countries with the Gregorian calendar. Unless otherwise indicated, dates in this article are given according to the Gregorian calendar. – 8 January 1642) was an Italian polymath.

New!!: Outline of galaxies and Galileo Galilei · See more »

Grand design spiral galaxy

A grand design spiral galaxy is a type of spiral galaxy with prominent and well-defined spiral arms, as opposed to multi-arm and flocculent spirals which have subtler structural features.

New!!: Outline of galaxies and Grand design spiral galaxy · See more »

Hot, dust-obscured galaxy

A hot, dust-obscured galaxy, or hot DOG, is a rare type of quasar.

New!!: Outline of galaxies and Hot, dust-obscured galaxy · See more »

Hubble's law

Hubble's law is the name for the observation in physical cosmology that.

New!!: Outline of galaxies and Hubble's law · See more »

Illustris project

The Illustris project is an ongoing series of astrophysical simulations run by an international collaboration of scientists.

New!!: Outline of galaxies and Illustris project · See more »

Interacting galaxy

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

New!!: Outline of galaxies and Interacting galaxy · See more »

Intergalactic dust

Intergalactic dust is cosmic dust in between galaxies in intergalactic space.

New!!: Outline of galaxies and Intergalactic dust · See more »

Intergalactic star

An intergalactic star, also known as an intracluster star or a rogue star, is a star not gravitationally bound to any galaxy.

New!!: Outline of galaxies and Intergalactic star · See more »

Intergalactic travel

Intergalactic travel is the term used for hypothetical manned or unmanned travel between galaxies.

New!!: Outline of galaxies and Intergalactic travel · See more »

Intermediate spiral galaxy

An intermediate spiral galaxy is a galaxy that is in between the classifications of a barred spiral galaxy and an unbarred spiral galaxy.

New!!: Outline of galaxies and Intermediate spiral galaxy · See more »

Interstellar medium

In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.

New!!: Outline of galaxies and Interstellar medium · See more »

Irregular galaxy

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

New!!: Outline of galaxies and Irregular galaxy · See more »

Jellyfish galaxy

A jellyfish galaxy is a type of galaxy found in galaxy clusters.

New!!: Outline of galaxies and Jellyfish galaxy · See more »

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.

New!!: Outline of galaxies and Lenticular galaxy · See more »

List of galaxies

The following is a list of notable galaxies.

New!!: Outline of galaxies and List of galaxies · See more »

List of galaxies named after people

A small number of galaxies or galaxy groups have been named after individual people.

New!!: Outline of galaxies and List of galaxies named after people · See more »

List of galaxy groups and clusters

This page lists some galaxy groups and galaxy clusters.

New!!: Outline of galaxies and List of galaxy groups and clusters · See more »

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.

New!!: Outline of galaxies and List of nearest galaxies · See more »

List of polar-ring galaxies

The following table lists polar-ring galaxies.

New!!: Outline of galaxies and List of polar-ring galaxies · See more »

List of quasars

This is a list of quasars.

New!!: Outline of galaxies and List of quasars · See more »

List of ring galaxies

This is a list of ring galaxies.

New!!: Outline of galaxies and List of ring galaxies · See more »

List of spiral galaxies

A spiral galaxy is a type of galaxy characterized by a central bulge of old Population II stars surrounded by a rotating disc of younger Population I stars.

New!!: Outline of galaxies and List of spiral galaxies · See more »

List of voids

This is a list of voids.

New!!: Outline of galaxies and List of voids · See more »

Lists of galaxies

This is a list of lists of galaxies.

New!!: Outline of galaxies and Lists of galaxies · See more »

Local Group

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

New!!: Outline of galaxies and Local Group · See more »

Low-ionization nuclear emission-line region

A low-ionization nuclear emission-line region (LINER) is a type of galactic nucleus that is defined by its spectral line emission.

New!!: Outline of galaxies and Low-ionization nuclear emission-line region · See more »

Low-surface-brightness galaxy

A low-surface-brightness galaxy, or LSB galaxy, is a diffuse galaxy with a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky.

New!!: Outline of galaxies and Low-surface-brightness galaxy · See more »

Luminous infrared galaxy

Luminous infrared galaxies or LIRGs are galaxies with luminosities, the measurement of brightness, above.

New!!: Outline of galaxies and Luminous infrared galaxy · See more »

Lyman-alpha emitter

A Lyman-alpha emitter (LAE) is a type of distant galaxy that emits Lyman-alpha radiation.

New!!: Outline of galaxies and Lyman-alpha emitter · See more »

Lyon-Meudon Extragalactic Database

The Lyon-Meudon Extragalactic Database (LEDA) was a database of galaxies, created in 1983 at the Lyon Observatory.

New!!: Outline of galaxies and Lyon-Meudon Extragalactic Database · See more »

Magellanic spiral

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

New!!: Outline of galaxies and Magellanic spiral · See more »

Markarian galaxies

The Markarian galaxies are a class of galaxies that have nuclei with excessive amounts of ultraviolet emissions compared with other galaxies.

New!!: Outline of galaxies and Markarian galaxies · See more »

Milky Way

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

New!!: Outline of galaxies and Milky Way · See more »

Morphological Catalogue of Galaxies

The Morphological Catalogue of Galaxies (MCG) or Morfologiceskij Katalog Galaktik, is a Russian catalogue of 30,642 galaxies compiled by Boris Vorontsov-Velyaminov and V. P. Arkhipova.

New!!: Outline of galaxies and Morphological Catalogue of Galaxies · See more »

Multiwavelength Atlas of Galaxies

The Multiwavelength Atlas of Galaxies is a textbook and atlas of 35 well studied galaxies (including our Galaxy) authored by Glen Mackie of the Centre for Astrophysics & Supercomputing, Swinburne University of Technology.

New!!: Outline of galaxies and Multiwavelength Atlas of Galaxies · See more »

Norma Arm

The Norma Arm is a minor spiral arm of the Milky Way extending from and around its central hub region.

New!!: Outline of galaxies and Norma Arm · See more »

Orion Arm

The Orion Arm is a minor spiral arm of the Milky Way some across and approximately in length, containing the Solar System, including the Earth.

New!!: Outline of galaxies and Orion Arm · See more »

Outline (list)

An outline, also called a hierarchical outline, is a list arranged to show hierarchical relationships and is a type of tree structure.

New!!: Outline of galaxies and Outline (list) · See more »

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.

New!!: Outline of galaxies and Pea galaxy · See more »

Peculiar galaxy

A peculiar galaxy is a galaxy of unusual size, shape, or composition.

New!!: Outline of galaxies and Peculiar galaxy · See more »

Perseus Arm

The Perseus Arm is one of two major spiral arms of the Milky Way galaxy.

New!!: Outline of galaxies and Perseus Arm · See more »

Physical cosmology

Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate.

New!!: Outline of galaxies and Physical cosmology · See more »

Polar-ring galaxy

A polar-ring galaxy is a type of galaxy in which an outer ring of gas and stars rotates over the poles of the galaxy.

New!!: Outline of galaxies and Polar-ring galaxy · See more »

Principal Galaxies Catalogue

The Catalogue of Principal Galaxies (PGC) is an astronomical catalog published in 1989 that lists B1950 and J2000 equatorial coordinates and cross-identifications for 73,197 galaxies.

New!!: Outline of galaxies and Principal Galaxies Catalogue · See more »

Protogalaxy

In physical cosmology, a protogalaxy, which could also be called a "primeval galaxy", is a cloud of gas which is forming into a galaxy.

New!!: Outline of galaxies and Protogalaxy · See more »

Quasar

A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).

New!!: Outline of galaxies and Quasar · See more »

Radio galaxy

Radio galaxies and their relatives, radio-loud quasars and blazars, are types of active galaxy that are very luminous at radio wavelengths, with luminosities up to 1039 W between 10 MHz and 100 GHz.

New!!: Outline of galaxies and Radio galaxy · See more »

Ring galaxy

A ring galaxy is a galaxy with a circle-like appearance.

New!!: Outline of galaxies and Ring galaxy · See more »

Sagittarius A*

Sagittarius A* (pronounced "Sagittarius A-star", standard abbreviation Sgr A*) is a bright and very compact astronomical radio source at the center of the Milky Way, near the border of the constellations Sagittarius and Scorpius.

New!!: Outline of galaxies and Sagittarius A* · See more »

Satellite galaxy

A satellite galaxy is a smaller companion galaxy that travels on bound orbits within the gravitational potential of a more massive and luminous host galaxy (also known as the primary galaxy).

New!!: Outline of galaxies and Satellite galaxy · See more »

Scutum–Centaurus Arm

The Scutum–Centaurus Arm, also known as Scutum-Crux arm, is a long, diffuse curving streamer of stars, gas and dust that spirals outward from the proximate end of the Milky Way's central bar.

New!!: Outline of galaxies and Scutum–Centaurus Arm · See more »

Seyfert galaxy

Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars.

New!!: Outline of galaxies and Seyfert galaxy · See more »

Shapley-Ames Catalog

The Shapley-Ames Catalog of Bright Galaxies is a catalog of galaxies published in 1932 that includes observations of 1249 objects brighter than 13.2 magnitude.

New!!: Outline of galaxies and Shapley-Ames Catalog · See more »

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.

New!!: Outline of galaxies and Spiral galaxy · See more »

Starburst galaxy

A starburst galaxy is a galaxy undergoing an exceptionally high rate of star formation, as compared to the long-term average rate of star formation in the galaxy or the star formation rate observed in most other galaxies.

New!!: Outline of galaxies and Starburst galaxy · See more »

Supercluster

A supercluster is a large group of smaller galaxy clusters or galaxy groups; it is among the largest-known structures of the cosmos.

New!!: Outline of galaxies and Supercluster · See more »

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.

New!!: Outline of galaxies and Supermassive black hole · See more »

Type-cD galaxy

The type-cD galaxy (also cD-type galaxy, cD galaxy) is a galaxy morphology classification, a subtype of type-D giant elliptical galaxy.

New!!: Outline of galaxies and Type-cD galaxy · See more »

Ultra diffuse galaxy

An ultra diffuse galaxy (UDG) is an extremely low luminosity galaxy, the first example of which was discovered in the nearby Virgo Cluster by Allan Sandage and Bruno Binggeli in 1984.

New!!: Outline of galaxies and Ultra diffuse galaxy · See more »

Unbarred lenticular galaxy

An unbarred lenticular galaxy is a lenticular version of an unbarred spiral galaxy.

New!!: Outline of galaxies and Unbarred lenticular galaxy · See more »

Unbarred spiral galaxy

An unbarred spiral galaxy is a type of spiral galaxy without a central bar, or one that is not a barred spiral galaxy.

New!!: Outline of galaxies and Unbarred spiral galaxy · See more »

University of Ottawa

The University of Ottawa (uOttawa or U of O) (Université d'Ottawa) is a bilingual public research university in Ottawa, Ontario, Canada.

New!!: Outline of galaxies and University of Ottawa · See more »

University of St Andrews

The University of St Andrews (informally known as St Andrews University or simply St Andrews; abbreviated as St And, from the Latin Sancti Andreae, in post-nominals) is a British public research university in St Andrews, Fife, Scotland.

New!!: Outline of galaxies and University of St Andrews · See more »

Uppsala General Catalogue

The Uppsala General Catalogue of Galaxies (UGC) is a catalogue of 12,921 galaxies visible from the northern hemisphere.

New!!: Outline of galaxies and Uppsala General Catalogue · See more »

Void (astronomy)

Cosmic voids are vast spaces between filaments (the largest-scale structures in the universe), which contain very few or no galaxies.

New!!: Outline of galaxies and Void (astronomy) · See more »

Void galaxy

Void galaxies are galaxies which exist in cosmological voids.

New!!: Outline of galaxies and Void galaxy · See more »

Vorontsov-Vel'yaminov Interacting Galaxies

Vorontsov-Vel'yaminov Interacting Galaxies are those included in the Atlas and Catalogue of Interacting Galaxies, by B.A. Vorontsov-Vel'yaminov, R.I. Noskova and V.P. Arkhipova.

New!!: Outline of galaxies and Vorontsov-Vel'yaminov Interacting Galaxies · See more »

X-shaped radio galaxy

X-shaped (or "winged") radio galaxies are a class of extragalactic radio source that exhibit two, low-surface-brightness radio lobes (the "wings") oriented at an angle to the active, or high-surface-brightness, lobes.

New!!: Outline of galaxies and X-shaped radio galaxy · See more »

References

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

OutgoingIncoming
Hey! We are on Facebook now! »