Assertion: planet's moon | /r/CapableOf | mark the boundary
Facets:
value: in description of the universe
type: OTHER
Source sentences:
text: In Aristotle's (384–322 BC) description of the universe, the Moon marked the boundary between the spheres of the mutable elements (earth, water, air and fire), and the imperishable stars of aether, an influential philosophy that would dominate for centuries.