Thus, for a planet to orbit the Sun, the Sun's force of gravity must act on it.
(a planet to orbit the Sun, the Sun's force of gravity; must act; on it) Context(a planet to orbit the Sun , the Sun 's force of gravity must act,List([10, 72))):(a planet; to orbit; the Sun)
a planet to orbit the Sun , the Sun 's force of gravity must act,List([10, 72))
a planet to orbit the Sun, the Sun's force of gravity a planet
must act to orbit
on it
the Sun