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13 relations: Catalogue of Galaxies and Clusters of Galaxies, Epoch (astronomy), Hubble's law, Lenticular galaxy, Light-year, List of NGC objects (1–1000), Morphological Catalogue of Galaxies, New General Catalogue, Pisces (constellation), Principal Galaxies Catalogue, Ralph Copeland, Solar System, 2MASS.
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.
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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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Hubble's law
Hubble's law is the name for the observation in physical cosmology that.
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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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List of NGC objects (1–1000)
This is a list of NGC objects 1–1000 from the New General Catalogue (NGC).
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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.
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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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Pisces (constellation)
Pisces is a constellation of the zodiac.
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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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Ralph Copeland
Dr Ralph Copeland FRSE FRAS (3 September 1837 – 27 October 1905) was an English astronomer and the third Astronomer Royal for Scotland.
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Solar System
The Solar SystemCapitalization of the name varies.
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2MASS
The Two Micron All-Sky Survey, or 2MASS, was an astronomical survey of the whole sky in the infrared spectrum and one of the most ambitious such projects.
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