Under the control of the Sun's gravitational force, each planet maintains an elliptical orbit and all of them travel in the same direction.

在太阳引力的控制下，每个行星都维持在一条椭圆形的轨道上，并按照相同的方向移动。

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If they are three units apart the gravitational force between is one ninth.

如果有三个单位的距离，那么引力就是九分之一。

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There is a gravitational force.

有一个重力作用。

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By the way, that's a very remarkable property of the gravitational force-- the cancellation of the two ms.

顺便说一下,这是重力的一个重要属性,即可以消去等式两边的 m

耶鲁公开课 - 基础物理课程节选

Newton Harvey--that enabled biologists to study cells as they were subjected to extreme gravitational force.

FORBES: The Alchemist

The tractor would intercept the asteroid from just 48m away and exert a small gravitational force on it, pulling the rock towards it.

BBC: British plan to tackle asteroids

This eponymous theory is that large masses (such as the moon) partially block the gravitational force from more distant objects (such as the sun).

ECONOMIST: Gravitational anomalies