In physics, gravitational acceleration is the acceleration on an object caused by force of gravitation.

He guessed the same force was responsible for other orbital motions, and hence named it universal gravitation .

General relativity is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915.

During this period, approximately 13.79 billion years ago, gravitation is believed to have been as strong as the other fundamental forces, and all the forces may have been unified.

That the force that causes the apple to fall to the ground is the same force that causes the planets and the moon to move around, and so on? Everybody knows that. It's a property of gravitation.

A few years ago, I was pretty excited to discover that there are candidate universes with incredibly simple rules that successfully reproduce special relativity, and even general relativity and gravitation, and at least give hints of quantum mechanics.

Their discovery of the system and analysis of it earned them the 1993 Nobel Prize in Physics for the discovery of a new type of pulsar, a discovery that has opened up new possibilities for the study of gravitation.