has black holes

9 triples
GPTKB property

Random triples
Subject Object
gptkb:M15 yes
gptkb:NGC_2808 possible
gptkb:NGC_6397 possible presence
gptkb:Omega_Centauri_cluster yes
gptkb:Omega_Centauri yes
gptkb:51_Pegasi_system false
gptkb:Messier_4 yes
gptkb:NGC_6656 possible
gptkb:NGC_5139 yes