Open star cluster M21


UA 16-inch image of Messier 21

The bright but very sparse star cluster Messier 21 in Sagittarius, shown in an R-band CCD image obtained with the UA 16-inch telescope. The field of view shown is 17 arcminutes wide. With a little imagination, you can see a sort of diamon ring arrangement of the bright stars.



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Last changes: 7/2006      © 2006