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23 relations: Barred spiral galaxy, Brett Domino, Caldwell catalogue, Centaurus, Centaurus A, Centaurus A/M83 Group, Constellation, Epoch (astronomy), Galaxy group, James Dunlop, La Silla Observatory, Light-year, Milky Way, MPG/ESO telescope, New General Catalogue, Orders of magnitude (length), Parsec, Principal Galaxies Catalogue, Science Daily, Second, Seyfert galaxy, Supermassive black hole, Xi Centauri.
Barred spiral galaxy
A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars.
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Brett Domino
Brett Domino is the alter-ego of musician and comedian Rob J. Madin.
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Caldwell catalogue
The Caldwell Catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.
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Centaurus
Centaurus is a bright constellation in the southern sky.
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Centaurus A
Centaurus A or NGC 5128 is a galaxy in the constellation of Centaurus.
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Centaurus A/M83 Group
The Centaurus A/M83 Group is a complex group of galaxies in the constellations Hydra, Centaurus, and Virgo.
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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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Epoch (astronomy)
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
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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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James Dunlop
James Dunlop FRSE (31 October 1793 – 22 September 1848) was a Scottish astronomer, noted for his work in Australia.
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La Silla Observatory
La Silla Observatory is an astronomical observatory in Chile with three telescopes built and operated by the European Southern Observatory (ESO).
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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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Milky Way
The Milky Way is the galaxy that contains our Solar System.
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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.
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New General Catalogue
The New General Catalogue of Nebulae and Clusters of Stars (abbreviated as NGC) is a catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888.
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Orders of magnitude (length)
The following are examples of orders of magnitude for different lengths.
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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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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.
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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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Second
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.
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Seyfert galaxy
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars.
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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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Xi Centauri
The Bayer designation Xi Centauri (ξ Cen / ξ Centauri) is shared by two star systems, in the constellation Centaurus.
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Redirects here:
Caldwell 83, Spiral Galaxy NGC 4945.
References
[1] https://en.wikipedia.org/wiki/NGC_4945
