Assertion: universe's object | /r/HasProperty | binary stars
Facets:
Source sentences:
text: Ghez believes all six objects were binary stars — a system of two stars orbiting each other — that merged because of the strong gravitational force of the supermassive black hole.
text: Ghez believes all six objects were binary stars -- a system of two stars orbiting each other -- that merged because of the strong gravitational force of the supermassive black hole.