Assertion: newton | /r/CapableOf | grapple in late 1660s
Facets:
value: with the idea
type: OTHER
value: to the moon
type: TRANSITIVE-OBJECT
Source sentences:
text: It is known from his notebooks that Newton was grappling in the late 1660s with the idea that terrestrial gravity extends, in an inverse-square proportion, to the Moon; however, it took him two decades to develop the full-fledged theory.