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Simple single page Star Chart for the Messier Objects. SVG format. -- w:user:Jim Cornmell 11:45, 6 September 2006 (UTC) Edited for xml correctness Zeimusu 14:58, 8 February 2007 (UTC)
STARCOM, or the Strategic Army Communication System, was a communications network built and operated by the United States Army Signal Corps in the 1950s and 1960s. An early large-scale automated data network, the system provided central control of defense communications and data services within the continental United States and overseas.
During the Korean War and the Vietnam War, US ground forces used the M127A1 White Star Signal Flare Parachute to illuminate the jungle in forward positions. A modern LUU-2B flare at 1,000 feet altitude illuminates the ground at 5 lux in a radius of 1500 feet. Burn time is 4–5 minutes.
A designated battalion signal officer prepares the battalion SOI in conformance with the SOI of higher headquarters. [2] During operations, SOI are changed daily. Since the fielding of the SINCGARS system, however, the paper SOI has generally faded from Army use.
The regions with higher density of stars are shown; these correspond with known star clusters (Hyades and Coma Berenices) and moving groups. This is a list of nearby stellar associations and moving groups. A stellar association is a very loose star cluster, looser than an open cluster. A moving group is the remnant of such a stellar association ...
Messier 93 or M93, also known as NGC 2447 or the Critter Cluster, is an open cluster in the modestly southern constellation Puppis, the imagined poop deck of the legendary Argo. Observational history and appearance
See also: Globular cluster, List of globular clusters Messier 107 or M107 , also known as NGC 6171 or the Crucifix Cluster , is a very loose globular cluster in a very mildly southern part of the sky close to the equator in Ophiuchus , and is the last such object in the Messier Catalogue .
Messier 80 (also known as M80 or NGC 6093) is a globular cluster in the constellation Scorpius. It was discovered by Charles Messier in 1781, being one of his first discoveries. [9] This star cluster is, as to its angle from the solar system, midway between α Scorpii and β Scorpii in a field in the Milky Way Galaxy that is rich in nebulæ.