Assertion: quasar's center | /r/CapableOf | revolve around its own axis
Facets:
value: during its gradual condensation
type: TEMPORAL
Source sentences:
text: This center, formed of indefinite molecules, began to revolve around its own axis during its gradual condensation; then, following the immutable laws of mechanics, in proportion as its bulk diminished by condensation, its rotary motion became accelerated, and these two effects continuing, the result was the formation of one principal star , the center of the nebulous mass.