Newton's Principia: The Mathematical Principles of Natural Philosophy

accelerative altitude angle aphelion appulse apsis arising ascend attracted axis body centre of gravity centripetal force circle comet common centre conic section conjunctly corpuscle cycloid cylinder density descend described diameter difference diminished distance diurnal motion drawn duplicate ratio earth ecliptic ellipsis equal equator figure fixed stars fluid force of gravity given ratio globe greater greatest Hence hyperbola inches infinitum inversely Jupiter latitude latus rectum LEMMA length less let fall mean motion medium moon moon's move nearly Newton nodes observations orbit oscillations parabola parallel particles pendulum perihelion perpendicular plane principal vertex Prop PROPOSITION quadratures quantity of matter radius reciprocally rectangle resistance revolve right line Saturn SCHOLIUM semi-diameter side sine space sphere square subducted subduplicate ratio sun's superficies suppose syzygies tail tangent thence THEOREM tion trajectory triangles velocity vertex weight whole