Dark galaxy, the Glossary
A dark galaxy is a hypothesized galaxy with no (or very few) stars.[1]
Table of Contents
43 relations: Andromeda Galaxy, Arecibo Observatory, Arecibo Telescope, Astronomical coordinate systems, Astronomical survey, Cosmic dust, Dark matter, Dragonfly 44, Galactic tide, Galaxy, Gravity, Green Bank Telescope, Hubble Space Telescope, Hydrogen atom, Hydrogen line, Hydrogen spectral series, Interstellar cloud, Kavli Institute for Cosmology, Mass, Messier 99, Milky Way, Modified Newtonian dynamics, Monthly Notices of the Royal Astronomical Society, New Scientist, Observable universe, Parkes Observatory, Quasar, Radio telescope, Redshift, Solar mass, Spectroscopy, Star, Stripe 82, The Astrophysical Journal, The New York Times, The Washington Post, Triangulum Galaxy, Ultra diffuse galaxy, University of California, Berkeley, University of California, Santa Cruz, University of Cambridge, Virgo Cluster, VIRGOHI21.
- Dark concepts in astrophysics
- Dark galaxies
- Hypothetical galaxies
Andromeda Galaxy
The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way.
See Dark galaxy and Andromeda Galaxy
Arecibo Observatory
The Arecibo Observatory, also known as the National Astronomy and Ionosphere Center (NAIC) and formerly known as the Arecibo Ionosphere Observatory, is an observatory in Barrio Esperanza, Arecibo, Puerto Rico owned by the US National Science Foundation (NSF).
See Dark galaxy and Arecibo Observatory
Arecibo Telescope
The Arecibo Telescope was a spherical reflector radio telescope built into a natural sinkhole at the Arecibo Observatory located near Arecibo, Puerto Rico.
See Dark galaxy and Arecibo Telescope
Astronomical coordinate systems
In astronomy, coordinate systems are used for specifying positions of celestial objects (satellites, planets, stars, galaxies, etc.) relative to a given reference frame, based on physical reference points available to a situated observer (e.g. the true horizon and north to an observer on Earth's surface).
See Dark galaxy and Astronomical coordinate systems
Astronomical survey
An astronomical survey is a general map or image of a region of the sky (or of the whole sky) that lacks a specific observational target.
See Dark galaxy and Astronomical survey
Cosmic dust
Cosmic dustalso called extraterrestrial dust, space dust, or star dustis dust that occurs in outer space or has fallen onto Earth.
See Dark galaxy and Cosmic dust
Dark matter
In astronomy, dark matter is a hypothetical form of matter that appears not to interact with light or the electromagnetic field. Dark galaxy and dark matter are dark concepts in astrophysics.
See Dark galaxy and Dark matter
Dragonfly 44
Dragonfly 44 is an ultra diffuse galaxy in the Coma Cluster. Dark galaxy and Dragonfly 44 are dark galaxies.
See Dark galaxy and Dragonfly 44
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.
See Dark galaxy and Galactic tide
Galaxy
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.
Gravity
In physics, gravity is a fundamental interaction which causes mutual attraction between all things that have mass.
Green Bank Telescope
The Robert C. Byrd Green Bank Telescope (GBT) in Green Bank, West Virginia, US is the world's largest fully steerable radio telescope, surpassing the Effelsberg 100-m Radio Telescope in Germany.
See Dark galaxy and Green Bank Telescope
Hubble Space Telescope
The Hubble Space Telescope (often referred to as HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
See Dark galaxy and Hubble Space Telescope
Hydrogen atom
A hydrogen atom is an atom of the chemical element hydrogen.
See Dark galaxy and Hydrogen atom
Hydrogen line
The hydrogen line, 21 centimeter line, or H I line is a spectral line that is created by a change in the energy state of solitary, electrically neutral hydrogen atoms.
See Dark galaxy and Hydrogen line
Hydrogen spectral series
The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula.
See Dark galaxy and Hydrogen spectral series
Interstellar cloud
An Interstellar Cloud is generally an accumulation of gas, plasma, and dust in our and other galaxies.
See Dark galaxy and Interstellar cloud
Kavli Institute for Cosmology
The Kavli Institute for Cosmology, Cambridge (KICC) is a research establishment set up through collaboration of the University of Cambridge and the Kavli Foundation.
See Dark galaxy and Kavli Institute for Cosmology
Mass
Mass is an intrinsic property of a body.
Messier 99
Messier 99 or M99, also known as NGC 4254 or St.
See Dark galaxy and Messier 99
Milky Way
The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
Modified Newtonian dynamics
Modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's second law to account for observed properties of galaxies. Dark galaxy and Modified Newtonian dynamics are dark matter.
See Dark galaxy and Modified Newtonian dynamics
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal in astronomy, astrophysics and related fields.
See Dark galaxy and Monthly Notices of the Royal Astronomical Society
New Scientist
New Scientist is a popular science magazine covering all aspects of science and technology.
See Dark galaxy and New Scientist
Observable universe
The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion.
See Dark galaxy and Observable universe
Parkes Observatory
Parkes Observatory is a radio astronomy observatory, located north of the town of Parkes, New South Wales, Australia.
See Dark galaxy and Parkes Observatory
Quasar
A quasar is an extremely luminous active galactic nucleus (AGN).
Radio telescope
A radio telescope is a specialized antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky.
See Dark galaxy and Radio telescope
Redshift
In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light).
Solar mass
The solar mass is a standard unit of mass in astronomy, equal to approximately.
See Dark galaxy and Solar mass
Spectroscopy
Spectroscopy is the field of study that measures and interprets electromagnetic spectra.
See Dark galaxy and Spectroscopy
Star
A star is a luminous spheroid of plasma held together by self-gravity.
Stripe 82
Stripe 82 is a 300 deg2 equatorial field of sky that was imaged multiple times by the Sloan Digital Sky Survey from 2000 to 2008.
The Astrophysical Journal
The Astrophysical Journal (ApJ) is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
See Dark galaxy and The Astrophysical Journal
The New York Times
The New York Times (NYT) is an American daily newspaper based in New York City.
See Dark galaxy and The New York Times
The Washington Post
The Washington Post, locally known as "the Post" and, informally, WaPo or WP, is an American daily newspaper published in Washington, D.C., the national capital.
See Dark galaxy and The Washington Post
Triangulum Galaxy
The Triangulum Galaxy is a spiral galaxy 2.73 million light-years (ly) from Earth in the constellation Triangulum.
See Dark galaxy and Triangulum Galaxy
Ultra diffuse galaxy
An ultra diffuse galaxy (UDG), or Dark galaxy, 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.
See Dark galaxy and Ultra diffuse galaxy
University of California, Berkeley
The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public land-grant research university in Berkeley, California.
See Dark galaxy and University of California, Berkeley
University of California, Santa Cruz
The University of California, Santa Cruz (UC Santa Cruz or UCSC) is a public land-grant research university in Santa Cruz, California.
See Dark galaxy and University of California, Santa Cruz
University of Cambridge
The University of Cambridge is a public collegiate research university in Cambridge, England.
See Dark galaxy and University of Cambridge
Virgo Cluster
The Virgo Cluster is a large cluster of galaxies whose center is 53.8 ± 0.3 Mly (16.5 ± 0.1 Mpc) away in the constellation Virgo.
See Dark galaxy and Virgo Cluster
VIRGOHI21
VIRGOHI21 is an extended region of neutral hydrogen (HI) in the Virgo cluster discovered in 2005. Dark galaxy and VIRGOHI21 are dark galaxies.
See also
Dark concepts in astrophysics
- Dark energy
- Dark flow
- Dark fluid
- Dark galaxies
- Dark galaxy
- Dark globular cluster
- Dark matter
- Dark photon
- Dark radiation
- Dark star (Newtonian mechanics)
- Dark star (dark matter)
- Dark-energy star
- Darkon (unparticle)
Dark galaxies
Hypothetical galaxies
- Dark galaxy
- Gaia Sausage
- Galaxy X (galaxy)
- Kraken galaxy
- M32p
- Messier 102
References
[1] https://en.wikipedia.org/wiki/Dark_galaxy
Also known as Dark body, Dark galaxies, Dark galaxy (astronomy), Dark matter galaxies, Dark matter galaxy, Galaxy J0613+52, Galaxy Nube, J0613+52, J0613+52 (galaxy), Nube (galaxy), Nube Galaxy.