The planets and stars exert similar forces, the forces between the stars and planets hold them in orbits.

This second planet exerted a gravitational force on the first planet, orbiting its host star in just 34 days.

Now that they had left it, the influence that the planet and its circumstances had been exerting upon all of them unconsciously was gone also.

Scientists finally concluded that the irregularities in the Uranus orbit could be explained only by assuming that a large unknown planet was exerting a gravitational pull.

Each moon or planet exerts gravity over the player character, requiring momentum to escape from the planet's orbit.

No doubt about it, the planet Sardalia had exerted a powerful spell on Voyager's crew.

Well, the larger planets in our system exert an even bigger force.

Could this planet have exerted some kind of influence on them?

Hone writes that the planets exert it directly through gravitation or another, unknown influence.

That is why the terrestrial planets could not grow very large and could not exert large pull on hydrogen and helium gas.