We don't really know. We can define what it is as a field of influence, because we know how it operates in the universe. And some scientists think that it is made up of particles called gravitons which travel at the speed of light.

Will gravity ever be understood?

The theory of gravity has been around for over three hundred years. From Newton to Einstein we have believed this theory that gravity is an internal force of mass, i.e., Mass creates Gravity [1]. However, no one has ever truly understood this force, nor have they proven its existence.

Do we understand how gravity works?

While Newton greatly added to our understanding of how gravity works, we still don't know why gravity works. Newton's law stated that every object in the universe with mass attracts every other object in the universe that has mass. ... The force of gravity on an object on Earth is the "weight" of the object.