Trinary systems like HR 6819 are less common, but nor are they extremely rare. Physicists currently believe that the supernovae that give rise to black holes would actually disrupt the structure ...

Recently, astronomers announced another, this time in the trinary star HD 132563. The detection of the new planet came as part of a larger study on the trinary star system spanning 10 years.

on which the central black hole is leisurely feasting – the newly discovered third object makes the system a trinary. It's the first time we've seen a system with this configuration, and it ...