WSupermassive black hole
WList of most massive black holes
W3C 75
WBahcall–Wolf cusp
WBrightest cluster galaxy
WCentral massive object
WCID-42
WDirect collapse black hole
WHE0450-2958
WHolmberg 15A
WM–sigma relation
WMass deficit
WNGC 1277
WNGC 4261
WOJ 287
WReverberation mapping
WRX J1131-1231
WS5 0014+81
WSagittarius A*
WSDSS J0927+2943
WSDSS J1106+1939
WSpin-flip
WTON 618
WULAS J1342+0928
WOphiuchus Supercluster