Butterfly Cluster
The Butterfly Cluster ( cataloged as Messier 6 or M6 , and as NGC 6405 ) is an open cluster of stars in the southern constellation of Scorpius . 
<triplet> Butterfly Cluster <subj> open cluster <obj> instance of <subj> Scorpius <obj> constellation <triplet> Scorpius <subj> constellation <obj> instance of