Assertion: nebula's material | /r/CapableOf | migrate over hundreds of millions of years
Facets:
value: outward to their current positions
type: TRANSITIVE-OBJECT
Source sentences:
text: The two are instead thought to have formed in orbits near Jupiter and Saturn (known as the "gas giants"), where more material was available, and to have migrated outward to their current positions over hundreds of millions of years.