This &quot;differential gravitational pull&quot; is similar to the effect of the Moon's and Sun's gravity that causes the tides on Earth.
(This &quot; is; similar to the effect of the Moon's and Sun's gravity) (the effect of the Moon's and Sun's gravity; causes; the tides on Earth)
This &quot the effect of the Moon's and Sun's gravity
is causes
similar to the effect of the Moon's and Sun's gravity
the tides on Earth