Assertion: universe's object | /r/HasProperty | massive
Facets:
value: to make
type: PURPOSE
value: for gravity
type: CAUSE
Source sentences:
text: One idea is to simply define a planet as a natural object in space that is massive enough for gravity to make it approximately spherical.
text: Additionally, other objects in the Solar System are massive enough to exert gravitational forces significant enough to alter the orbit of smaller objects.