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

NGC 6822

Index NGC 6822

NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. [1]

37 relations: Absolute magnitude, Andromeda Galaxy, Astronomy, Atacama Large Millimeter Array, Barred irregular galaxy, Bubble Nebula (NGC 6822), Caldwell catalogue, Cepheid variable, Constellation, David Dunlap Observatory Catalogue, Edward Emerson Barnard, Edwin Hubble, European Southern Observatory, Galaxy, GALEX, Great Debate (astronomy), H II region, Harlow Shapley, Heber Doust Curtis, Large Magellanic Cloud, Light-year, Local Group, Milky Way, MPG/ESO telescope, Parsec, Paul W. Hodge, Principal Galaxies Catalogue, Refracting telescope, Ring Nebula (NGC 6822), Robert Burnham Jr., Sagittarius (constellation), Second, Small Magellanic Cloud, Spiral galaxy, Susan Kayser, Triangulum Galaxy, Universe.

Absolute magnitude

Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.

New!!: NGC 6822 and Absolute magnitude · See 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.

New!!: NGC 6822 and Andromeda Galaxy · See more »


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

New!!: NGC 6822 and Astronomy · See more »

Atacama Large Millimeter Array

The Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of radio telescopes in the Atacama Desert of northern Chile.

New!!: NGC 6822 and Atacama Large Millimeter Array · See more »

Barred irregular galaxy

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

New!!: NGC 6822 and Barred irregular galaxy · See more »

Bubble Nebula (NGC 6822)

The Bubble Nebula in Barnard's Galaxy has the official designation of Hubble 1925 I as it was the first (Roman numeral 1) object recorded in.

New!!: NGC 6822 and Bubble Nebula (NGC 6822) · See more »

Caldwell catalogue

The Caldwell Catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.

New!!: NGC 6822 and Caldwell catalogue · See more »

Cepheid variable

A Cepheid variable is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude.

New!!: NGC 6822 and Cepheid variable · See more »


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.

New!!: NGC 6822 and Constellation · 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!!: NGC 6822 and David Dunlap Observatory Catalogue · See more »

Edward Emerson Barnard

Edward Emerson Barnard (December 16, 1857 – February 6, 1923) was an American astronomer.

New!!: NGC 6822 and Edward Emerson Barnard · See more »

Edwin Hubble

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

New!!: NGC 6822 and Edwin Hubble · See more »

European Southern Observatory

The European Southern Observatory (ESO) is a 15-nation intergovernmental research organization for ground-based astronomy.

New!!: NGC 6822 and European Southern Observatory · See more »


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

New!!: NGC 6822 and Galaxy · See more »


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

New!!: NGC 6822 and GALEX · See more »

Great Debate (astronomy)

The Great Debate, also called the Shapley–Curtis Debate, was held on 26 April 1920 at the Smithsonian Museum of Natural History, between the astronomers Harlow Shapley and Heber Curtis.

New!!: NGC 6822 and Great Debate (astronomy) · See more »

H II region

An H II region or HII region is a region of interstellar atomic hydrogen that is ionized.

New!!: NGC 6822 and H II region · See more »

Harlow Shapley

Harlow Shapley (November 2, 1885 – October 20, 1972) was a 20th-century American scientist, head of the Harvard College Observatory (1921–1952), and political activist during the latter New Deal and Fair Deal.

New!!: NGC 6822 and Harlow Shapley · See more »

Heber Doust Curtis

Heber Doust Curtis (June 27, 1872 – January 9, 1942) was an American astronomer.

New!!: NGC 6822 and Heber Doust Curtis · See more »

Large Magellanic Cloud

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

New!!: NGC 6822 and Large Magellanic Cloud · See more »


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.

New!!: NGC 6822 and Light-year · See more »

Local Group

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

New!!: NGC 6822 and Local Group · See more »

Milky Way

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

New!!: NGC 6822 and Milky Way · See more »

MPG/ESO telescope

The MPG/ESO telescope is a 2.2-metre f/8.0 (17.6-metre) ground-based telescope at the European Southern Observatory (ESO) in La Silla, Chile.

New!!: NGC 6822 and MPG/ESO telescope · See more »


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

New!!: NGC 6822 and Parsec · See more »

Paul W. Hodge

Paul W. Hodge (born 1934) is an American astronomer whose principal area of research is the stellar populations of galaxies.

New!!: NGC 6822 and Paul W. Hodge · 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!!: NGC 6822 and Principal Galaxies Catalogue · See more »

Refracting telescope

A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope).

New!!: NGC 6822 and Refracting telescope · See more »

Ring Nebula (NGC 6822)

The Ring Nebula in Barnard's Galaxy has the official designation of Hubble 1925 III as it was the third (Roman numeral 3) object recorded in Hubble's 1925 paper, N.G.C. 6822, A Remote Stellar System.

New!!: NGC 6822 and Ring Nebula (NGC 6822) · See more »

Robert Burnham Jr.

Robert Burnham Jr. (June 16, 1931 – March 20, 1993) was an American astronomer, best known for writing the classic three-volume Burnham's Celestial Handbook.

New!!: NGC 6822 and Robert Burnham Jr. · See more »

Sagittarius (constellation)

Sagittarius is one of the constellations of the zodiac.

New!!: NGC 6822 and Sagittarius (constellation) · See more »


The second is the SI base unit of time, commonly understood and historically defined as 1/86,400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each.

New!!: NGC 6822 and Second · See more »

Small Magellanic Cloud

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

New!!: NGC 6822 and Small Magellanic Cloud · 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!!: NGC 6822 and Spiral galaxy · See more »

Susan Kayser

Susan Kayser is an American astronomer.

New!!: NGC 6822 and Susan Kayser · See more »

Triangulum Galaxy

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

New!!: NGC 6822 and Triangulum Galaxy · See more »


The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

New!!: NGC 6822 and Universe · See more »

Redirects here:

Barnard's Galaxy, Caldwell 57, IC 4895.


[1] https://en.wikipedia.org/wiki/NGC_6822

Hey! We are on Facebook now! »