Gravity is the force that keeps planets orbiting their suns, and moons orbiting the planets.
(Gravity; is; the force that keeps planets orbiting their suns, and moons) (the force; keeps; planets; orbiting their suns, and moons) (planets; orbiting; their suns, and moons) (moons; orbiting; the planets)
Gravity the force planets moons
is keeps orbiting orbiting
the force that keeps planets orbiting their suns, and moons
planets orbiting their suns, and moons
their suns, and moons
the planets