Dictionary of Nomenclature of Celestial Objects

 (Arm feature)
Details on Acronym:   NAME Arm
   NAME Arm Write:<<NAME Arm W N in M 31>> N: 7+7 Object:Arm  (SIMBAD class: PartofG = Part of a Galaxy) Note:In the format 'W N' stands for: 'N 1' to 'N 7' and 'S 1' to 'S 7' where N and S refer to arms on the North following and South preceding sides of the major axis.
These arms were also studied by Baade in 1963 (Evolution of stars and galaxies). in source:M 31 = NGC 224 Ref:=1964ApJ...139.1045A byARP H.C. Astrophys. J., 139, 1045-1057 (1964) Spiral structure in M 31. o<NAME Arm W N in M 31> (Nos N 1 to N 7) and (Nos S 1 to S 7) Originof the Acronym: L = Found in the literature

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