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Messier 9 or M9 (also designated NGC 6333) is a globular cluster in the constellation of Ophiuchus. It is positioned in the southern part of the constellation to the southwest of Eta Ophiuchi , and lies atop a dark cloud of dust designated Barnard 64.
[9] [10] 2020 — On October 8, 2020, scientists released the largest and most detailed 3D maps of the Universe, called "PS1-STRM". The data of the MAST was created using artificial neural networks and combines data from the Sloan Digital Sky Survey and others. Users can query the dataset online or download it in its entirety of ~300GB.
The Messier catalogue was actually compiled as a list of known objects that might be confused with comets. Moore also observed that since Messier compiled his list from observations in Paris, it did not include bright deep-sky objects visible in the Southern Hemisphere , such as Omega Centauri , Centaurus A , the Jewel Box , and 47 Tucanae .
Other astronomers, using side notes in Messier's texts, eventually filled out the list up to 110 objects. [9] The catalogue consists of a diverse range of astronomical objects, from star clusters and nebulae to galaxies. For example, Messier 1 is a supernova remnant, known as the Crab Nebula, and the great spiral Andromeda Galaxy is M31.
Tabula Peutingeriana (section of a modern facsimile), top to bottom: Dalmatian coast, Adriatic Sea, southern Italy, Sicily, African Mediterranean coast. Tabula Peutingeriana (Latin for 'The Peutinger Map'), also referred to as Peutinger's Tabula, [1] Peutinger tables [2] or Peutinger Table, is an illustrated itinerarium (ancient Roman road map) showing the layout of the cursus publicus, the ...
A Messier marathon is an attempt, usually organized by amateur astronomers, to find as many Messier objects as possible during one night. The Messier catalogue was compiled by French astronomer Charles Messier during the late 18th century and consists of 110 relatively bright deep-sky objects ( galaxies , nebulae , and star clusters ).
The 312 items in Sharpless sometimes overlap with the 110 Messier objects (M), 7,840 objects in the New General Catalogue (NGC), the Caldwell catalogue (itself a "best of" from other catalogues, with 109 items), and the RCW catalog. Contemporary catalogs were Gum and RCW, but they mainly covered the southern hemisphere.
In classical antiquity, Europe was assumed to cover the quarter of the globe north of the Mediterranean, an arrangement that was adhered to in medieval T and O maps. Ptolemy's world map of the 2nd century already had a reasonably precise description of southern and western Europe, but was unaware of particulars of northern and eastern Europe.