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Elliptical galaxy

Index Elliptical galaxy

An elliptical galaxy is a type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless image. [1]

51 relations: Andromeda Galaxy, Andromeda–Milky Way collision, Bulge (astronomy), Cambridge University Press, Centaurus A, Dark matter, Disc galaxy, Dwarf elliptical galaxy, Dwarf spheroidal galaxy, Edwin Hubble, Ellipsoid, Firehose instability, Galaxy, Galaxy cluster, Galaxy color–magnitude diagram, Galaxy group, Galaxy merger, Galaxy morphological classification, Globular cluster, Herschel Space Observatory, Hubble sequence, IC 1101, Interstellar medium, Lenticular galaxy, Light-year, Maffei 1, M–sigma relation, Messier 105, Messier 49, Messier 59, Messier 60, Messier 87, Messier 89, Milky Way, Monthly Notices of the Royal Astronomical Society, Observable universe, Open cluster, Osipkov–Merritt model, Radio galaxy, Rotation, Sersic profile, Silliman Memorial Lectures, Spiral galaxy, Star, Star formation, Stellar population, Supermassive black hole, Type-cD galaxy, Velocity dispersion, Virgo Supercluster, ..., Yale University Press. Expand index (1 more) »

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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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.

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Bulge (astronomy)

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

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Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

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Centaurus A

Centaurus A or NGC 5128 is a galaxy in the constellation of Centaurus.

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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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Disc galaxy

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

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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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Edwin Hubble

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

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Ellipsoid

An ellipsoid is a surface that may be obtained from a sphere by deforming it by means of directional scalings, or more generally, of an affine transformation.

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Firehose instability

The firehose instability (or hose-pipe instability) is a dynamical instability of thin or elongated galaxies.

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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 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.

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Galaxy color–magnitude diagram

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

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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.

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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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Globular cluster

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

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Herschel Space Observatory

The Herschel Space Observatory was a space observatory built and operated by the European Space Agency (ESA).

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Hubble sequence

The Hubble sequence is a morphological classification scheme for galaxies invented by Edwin Hubble in 1926.

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IC 1101

IC 1101 is a supergiant elliptical galaxy at the center of the Abell 2029 galaxy cluster, approximately 320 megaparsecs (1.04 billion light-years) from Earth.

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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.

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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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Light-year

The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.

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Maffei 1

Maffei 1 is a massive elliptical galaxy in the constellation Cassiopeia.

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M–sigma relation

The M–sigma (or M–σ) relation is an empirical correlation between the stellar velocity dispersion σ of a galaxy bulge and the mass M of the supermassive black hole at its center.

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Messier 105

Messier 105 (also known as M105 and NGC 3379) is an elliptical galaxy in the constellation Leo.

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Messier 49

Messier 49 (also known as M 49 or NGC 4472) is an elliptical galaxy located about away in the equatorial constellation of Virgo.

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Messier 59

Messier 59, also known as M59 or NGC 4621, is an elliptical galaxy in the constellation Virgo.

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Messier 60

Messier 60, also known as NGC 4649, is an elliptical galaxy approximately 55 million light-years away in the constellation Virgo.

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Messier 87

Messier 87 (also known as Virgo A or NGC 4486, generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo.

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Messier 89

Messier 89 (M89 for short, also known as NGC 4552) is an elliptical galaxy in the constellation Virgo.

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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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Observable universe

The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.

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Open cluster

An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age.

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Osipkov–Merritt model

Osipkov–Merritt models (named for Leonid Osipkov and David Merritt) are mathematical representations of spherical stellar systems (galaxies, star clusters, globular clusters etc.). The Osipkov-Merritt formula generates a one-parameter family of phase-space distribution functions that reproduce a specified density profile (representing stars) in a specified gravitational potential (in which the stars move).

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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.

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Rotation

A rotation is a circular movement of an object around a center (or point) of rotation.

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Sersic profile

The Sérsic profile (or Sérsic model or Sérsic's law) is a mathematical function that describes how the intensity I of a galaxy varies with distance R from its center.

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Silliman Memorial Lectures

The Silliman Memorial lectures series has been published by Yale University since 1901.

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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 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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Stellar population

During 1944, Walter Baade categorized groups of stars within the Milky Way into bluer stars associated with the spiral arms and the general position of yellow stars near the central galactic bulge or within globular star clusters.

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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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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.

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Velocity dispersion

In astronomy, the velocity dispersion (σ) is the statistical dispersion of velocities about the mean velocity for a group of objects, such as an open cluster, globular cluster, galaxy, galaxy cluster, or supercluster.

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Virgo Supercluster

The Virgo Supercluster (Virgo SC) or the Local Supercluster (LSC or LS) is a mass concentration of galaxies containing the Virgo Cluster and Local Group, which in turn contains the Milky Way and Andromeda galaxies.

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Yale University Press

Yale University Press is a university press associated with Yale University.

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Redirects here:

Bared elliptical galaxy, Early-type galaxies, Elliptical Galaxies, Elliptical galaxies, Giant elliptical, Giant elliptical galaxy, Spherical galaxy.

References

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

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