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Charles Messier. The first edition of 1774 covered 45 objects (M1 to M45).The total list published by Messier in 1781 contained 103 objects, but the list was expanded through successive additions by other astronomers, motivated by notes in Messier's and Méchain's texts indicating that at least one of them knew of the additional objects.
Charles Messier measured the position of the cluster and included it as "M45" in his catalogue of comet-like objects, published in 1771. Along with the Orion Nebula and the Praesepe cluster, Messier's inclusion of the Pleiades has been noted as curious, as most of Messier's objects were much fainter and more easily confused with comets ...
Simple single page Star Chart for the Messier Objects. SVG format. -- w:Jim Cornmell 11:45, 6 September 2006 (UTC) File usage. The following 52 pages use this file:
The Small Sagittarius Star Cloud (also known as Messier 24 and IC 4715) is a star cloud in the constellation of Sagittarius approximately 600 light years wide, which was catalogued by Charles Messier in 1764. [4] The stars, clusters and other objects comprising M24 are part of the Sagittarius or Sagittarius-Carina arms of the Milky Way galaxy ...
M — Catalog of Nebulae and Star Clusters (Messier object) M — Minkowski (planetary nebulae) Ma — J.H. Madler (double stars) Mac — Maclear (double stars) MACS — Massive Cluster Survey or Magellanic Catalogue of Stars; MACHO — MACHO Project lensing events (Massive Compact Halo Object)
The Whirlpool Galaxy, also known as Messier 51a (M51a) or NGC 5194, is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus. [6] [7] [8] It lies in the constellation Canes Venatici, and was the first galaxy to be classified as a spiral galaxy. [9]
9-1-1: Lone Star is going out with a bang.. The Fox drama is heading into its series finale with an asteroid hitting Austin, which may sound like something you'd only see in a screenplay — but ...
γ Aquarii, also called Sadachbia, [16] is a white main sequence star of spectral type star of spectral type A0V that is between 158 and 315 million years old and is around 2.5 times the Sun's mass (2.5 M ☉), [17] and double its radius. [18] Its magnitude is 3.85, and it is 164 ± 9 light years away, [15] hence its luminosity is 50 L ☉. [7]