Assertion: body's orbit | /r/HasProperty | found by kepler
Facets:
Source sentences:
text: Leibniz initiated their discussion in March of 1693: after highlighting Newton's “astonishing discovery” that the elliptical planetary orbits found by Kepler can be the result of gravitational attraction within the solar system, Leibniz contends that these motions must be caused by “the motion of a fluid medium” (Newton 2004: 106).