Messier 22, also known as M22 and NGC 6656, is a very bright globular cluster located in the constellation Sagittarius. It is seen against the densely packed starry background of the Milky Way. Angularly, it is close our Galaxy’s bulge and also its center. This cluster, having a negative declination (-23º 54′), cannot be … Continue reading Messier 22. NGC 6656