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The Messier catalogue is one of the most famous lists of astronomical objects, and many objects on the list are still referenced by their Messier numbers. [1] The catalogue includes most of the astronomical deep-sky objects that can be easily observed from Earth's Northern Hemisphere ; many Messier objects are popular targets for amateur ...
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The Messier catalogue: the Messier objects are a set of astronomical objects first listed by French astronomer Charles Messier in 1771. Nebulae and Star Clusters was published in 1781, with objects M1–M110. The New General Catalogue or NGC, compiled in the 1880s by J. L. E. Dreyer, lists objects NGC 0001 – NGC 7840. It is one of the largest ...
Terzan — Agop Terzan Catalogue of Globular Star Clusters (11 objects) THA — TH-alpha catalogue of emission line stars in the Eta Carinae nebula region; TIC — TESS Input Catalog; TIC — Tycho Input Catalog; TOI — TESS Object of Interest; Tom — Clyde Tombaugh (open star clusters) Ton — Tonantzintla Catalogue (globular star clusters)
Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major. It has a D 25 isophotal diameter of 29.44 kiloparsecs (96,000 light-years ).
In 1781, the French astronomer Charles Messier published a catalogue of 103 objects that had a nebulous appearance as part of a list intended to identify objects that might otherwise be confused with comets. In subsequent use, each catalogue entry was prefixed with an "M". Thus, M87 was the eighty-seventh object listed in Messier's catalogue. [15]
Messier 83 captured by the Wide Field Imager at ESO's La Silla Observatory in September 2008 M83 is a massive, grand design spiral galaxy . [ 10 ] Its morphological classification in the De Vaucouleurs system is SAB(s)c, [ 2 ] where the 'SAB' denotes a weak-barred spiral, '(s)' indicates a pure spiral structure with no ring, and 'c' means the ...
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