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c. 300 BC — star catalog of Timocharis of Alexandria. c. 134 BC — Hipparchus makes a detailed star map. c. 150 — Ptolemy completes his Almagest, which contains a catalog of stars, observations of planetary motions, and treatises on geometry and cosmology. c. 705 — Dunhuang Star Chart, a manuscript star chart from the Mogao Caves at ...
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.
v. t. e. The New General Catalogue of Nebulae and Clusters of Stars (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and emission nebulae. Dreyer published two supplements to the NGC in 1895 and 1908, known as the ...
Kaepernick, who turns 37 on Nov. 3, has not played in an NFL game since Jan. 1, 2017, after he began kneeling on the sideline at games during the national anthem to protest social injustice and ...
Salah ad-Din Yusuf ibn Ayyub[ a] ( c. 1137 – 4 March 1193), commonly known as Saladin, [ b] was the founder of the Ayyubid dynasty. Hailing from a Kurdish family, he was the first sultan of both Egypt and Syria. An important figure of the Third Crusade, he spearheaded the Muslim military effort against the Crusader states in the Levant.
The Card Catalog at the Library of Congress. A library catalog (or library catalogue in British English) is a register of all bibliographic items found in a library or group of libraries, such as a network of libraries at several locations. A catalog for a group of libraries is also called a union catalog.
A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem , there are an infinite number of prime numbers. Subsets of the prime numbers may be generated with various formulas for primes .
An astronomical catalog or catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. The oldest and largest are star catalogues.