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The variability of R Coronae Borealis was discovered by English astronomer Edward Pigott in 1795. [13] In 1935 it was the first star shown to have a different chemical composition to the Sun via spectral analysis. [17] R Coronae Borealis is the prototype of the R Coronae Borealis class of variable stars.
[1] [5] The name chosen was "Recondo" for Reconnaissance Commando. The course stressed improvised demolitions, the art of patrolling and intelligence gathering, recognition of enemy vehicles, woodlands survival (including a segment on snake handling), land navigation, rappelling, firearms skills of allied and enemy weapons, and aggressive hand ...
A A&TWF – Acquisition and technology work force a – Army AA – Assembly area AA – Anti-aircraft AA – Aegis ashore AAA – Anti-aircraft artillery "Triple A" AAAV – Advanced Amphibious Assault Vehicle AAC – Army Air Corps AAD – Armored amphibious dozer AADC – Area air defense commander AAE – Army acquisition executive AAG – Anti-aircraft gun AAK – Appliqué armor kit (US ...
Vierling – German for "quadruple", referring to any weapons mount that used four machine guns or autocannon of the same make and model, in a single traversable and elevatible mount, used as part of the name for the Flakvierling quadmount 20mm anti-aircraft cannon system, and the experimental HL 131V (Hecklafette 131-Vierling) tail turret ...
U.S. Marines on a recon mission during a field training exercise in 2003. In military operations, military reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, the terrain, and civil activities in the area of operations.
Alpha Coronae Borealis (α Coronae Borealis, abbreviated Alpha CrB, α CrB), officially named Alphecca / æ l ˈ f ɛ k ə /, [11] is an eclipsing binary star in the constellation of Corona Borealis. It is located about 75 light years from the Sun and contains two main sequence stars, one class A and one class G .
Gamma Coronae Borealis, Latinized from γ Coronae Borealis, is a binary star system in the northern constellation of Corona Borealis. It is visible to the naked eye with an apparent visual magnitude of 3.83. [5] Based upon an annual parallax shift of 22.33 [1] mas as seen from Earth, it is located about 146 light years from the Sun.
Iota Coronae Borealis, Latinized from ι Coronae Borealis, is a binary star [6] system in the constellation Corona Borealis. It is visible to the naked eye with a combined apparent visual magnitude of is 4.96. [ 2 ]