Arp 147
... that the galaxy pair Arp 147 contains a ring of nine black holes?
... that the galaxy pair <b id="mwCHs"><a href="./Arp_147" id="mwCHw" rel="mw:WikiLink" title="Arp 147">Arp 147</a></b> contains a ring of nine <a class="mw-redirect" href="./Black_holes" id="mwCH0" rel="mw:WikiLink" title="Black holes">black holes</a>?