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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.
In April 2015, Microsoft announced that it was adding a Minecraft Mod Developer Pack to Microsoft Visual Studio, granting users of the application creation software an easier way to program Minecraft mods. [24] Microsoft released the new pack open source and free of charge, amidst a drive to push towards more open source software. [24] [25]
Messier 10 or M10 (also designated NGC 6254) is a globular cluster of stars in the equatorial constellation of Ophiuchus. The object was discovered by the French astronomer Charles Messier on May 29, 1764, who cataloged it as number 10 in his catalogue and described it as a " nebula without stars".
At its brightness of visual magnitude 7.5 and diameter of about 8 arcminutes, it is easily visible in binoculars [4] and is a popular observing target in amateur telescopes. The Dumbbell Nebula appears shaped like a prolate spheroid and is viewed from our perspective along the plane of its equator.
In contrast, the intrinsic brightness of an astronomical object, does not depend on the distance of the observer or any extinction. [ 19 ] The absolute magnitude M , of a star or astronomical object is defined as the apparent magnitude it would have as seen from a distance of 10 parsecs (33 ly ).
Messier 29 or M29, also known as NGC 6913 or the Cooling Tower Cluster, is a quite small, bright open cluster of stars just south of the central bright star Gamma Cygni of a northerly zone of the sky, Cygnus. It was discovered by Charles Messier in 1764, and can be seen from Earth by using binoculars.
Dark sky image with some objects around Pinwheel Galaxy (M 101). The quarter in the lower right shows the tail of Ursa Major with the stars Mizar, Alcor and Alkaid.. The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on, unbarred, and counterclockwise spiral galaxy located 21 million light-years (6.4 megaparsecs) [5] from Earth in the constellation Ursa Major.
The Sombrero Galaxy is 11.5° west of Spica [10] and 5.5° north-east of Eta Corvi. [38] Although it is visible with 7×35 binoculars or a 4-inch (100 mm) amateur telescope, [38] an 8-inch (200 mm) telescope is needed to distinguish the bulge from the disk, [10] and a 10- or 12-inch (250 or 300 mm) telescope to see the dark dust lane. [10]