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An open cluster in the Cygnus constellation, with a distance of about 800 light years away

An open cluster in the constellation Sagittarius, with a distance of about 2,150 light-year

An open cluster of stars in the constellation of Scorpius.

...the brightest star in the night sky, [[Sirius]] (α Canis Majoris), and the open cluster [[Messier 41]]. * Open cluster [[M 41]]

An open cluster in the constellation Cassiopeia, which is at a distance of about 8,000 ligh

An open cluster in the constellation Monoceros, is at a distance of about 3,000 light-years

An open cluster in the Hydra constellation, with an age estimated to amount 300 million yea

An [[open cluster]] located in the [[constellation]] [[Cancer (constellation)|Cancer]].

An open cluster in the Auriga constellation, a distance of about 4,100 light years away fro

An open cluster of stars in the constellation of Scorpius, with a vague resemblance of its

'''NGC 752''' is an [[open cluster]] in the constellation [[Andromeda (constellation)|Andromeda]]. | type = [[Open cluster]]

An open cluster in the constellation Puppis, is at a distance of about 1,600 light-years fr

| [[Open cluster]] | [[Open cluster]]

An open cluster in the constellation Puppis, is at a distance of about 3,600 light years fr

...nown as [[NGC 6994]] (Messier 73) which was mistakenly regarded as a small open cluster with nebulosity by Messier.

...d its satellite galaxies [[NGC 221]] (M 32) and [[NGC 205]] (M 110). The [[open cluster]] [[NGC 752]] is conspicuous in small optical instruments.

...[Robert Julius Trumpler]] had quantified this effect in 1930 by studying [[open cluster]]s, the present picture of our galaxy as described above emerged.

...piral arms, which represent areas of high density), but not in the halo. [[Open cluster]]s also occur primarily in the disk.

...ally serve to disperse the cloud, often leaving behind one or more young [[open cluster]]s of stars. These gradually disperse to join the population of stars in th