Corona Borealis Supercluster
... that five galaxy clusters within the Corona Borealis Supercluster are in the process of collapsing and merging to form a single massive cluster?
... that five <a href="./Galaxy_cluster" id="mwBoI" rel="mw:WikiLink" title="Galaxy cluster">galaxy clusters</a> within the <b id="mwBoM"><a href="./Corona_Borealis_Supercluster" id="mwBoQ" rel="mw:WikiLink" title="Corona Borealis Supercluster">Corona Borealis Supercluster</a></b> are in the process of collapsing and merging to form a single massive cluster?