Messier 7
Messier 7 or M7 , also designated NGC 6475 and sometimes known as the Ptolemy Cluster , is an open cluster of stars in the constellation of Scorpius . 
<triplet> Messier 7 <subj> open cluster <obj> instance of <subj> Scorpius <obj> constellation <triplet> Scorpius <subj> constellation <obj> instance of