Random triples
| Subject | Object |
|---|---|
| gptkb:Crux_X-1 | identified in the Crux constellation |
| gptkb:Cygnus_X-1 | identified as a black hole |
| gptkb:Centaurus_X-1 | identified in the 1960s |
| gptkb:Centaurus_X-9 | identified in the Centaurus constellation |
| gptkb:Centaurus_X-20 | identified in the 1970s |
| gptkb:Cygnus_X-9 | identified in the Cygnus constellation |