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Caldwell advocates, however, see the catalog as a useful list of some of the brightest and best known non-Messier deep-sky objects. Thus, advocates dismiss any "controversy" as being fabricated by older amateurs simply not able or willing to memorize the new designations despite every telescope database using the Caldwell IDs as the primary ...
Education in Romania. Education in Romania is based on a free-tuition, egalitarian system. Access to free education is guaranteed by Article 32 in the Constitution of Romania. [ 1] Education is regulated and enforced by the Ministry of National Education. [ 2] Each step has its own form of organization and is subject to different laws and ...
Markov (telescopic asterisms) (for example: Markov 1 in Hercules) MAXI — Monitor of All-sky X-ray Image. Mayall — Nicholas Mayall (for example: globular star cluster Mayall II orbiting Messier 31, the Andromeda galaxy) Mayer (open star clusters) McC — McCormick Observatory Catalog. MCG — Morphological Catalogue of Galaxies.
The main academic full-text databases are open archives or link-resolution services, although others operate under different models such as mirroring or hybrid publishers. Such services typically provide access to full text and full-text search, but also metadata about items for which no full text is available.
3C. The catalogue was published in 1959 by members of the Radio Astronomy Group of the University of Cambridge. Entries in the catalogue are identified by the prefix "3C" followed by the entry number, with a space - for example, 3C 273. The number denotes objects in order of increasing right ascension. The catalogue was produced using the ...
Gliese published an update as the Catalogue of Nearby Stars in 1969, all known stars to 22 parsecs (72 ly), which catalogued 1,529 stars, [ 2] encoded as Gl NNN.NA (prefix Gl and the entries of twelve years before gained a .0 affix; the more than 500 additional stars were recorded using interspersed 0.1, 0.2 etc. numbering).
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The Catalogue of Nebulae and Clusters of Stars was first published in 1786 by William Herschel in the Philosophical Transactions of the Royal Society of London. [ 1] In 1789, he added another 1,000 entries, [ 2] and finally another 500 in 1802, [ 3] bringing the total to 2,500 entries. This catalogue originated the usage of letters and ...