How does the gravity works around the world? be specific.?

Question

How does the gravity works around the world? be specific.?

Answer 1

General Relativity describes the interdependence of gravity and space and time.

It says that whenever there is mass, the mass curves the space and time. This curvature in space and time decides the path of nearby moving objects if it has to be straight or something else. This is what gravity is.

Answer 2

This is an explanation of how gravity pulls on things. As in my blue sky pages, it doesn't provide a completely satisfying picture of why everything is the way it is, but no scientific explanation can do that. It does fill in some of the details of how gravitational pull is modeled by the best known description of particle motion (quantum mechanics) combined with the best known theory of gravity (general relativity).

It is the most intuitive picture I know of how the space-time geometry of general relativity gives rise to a gravitational pull. It's unusual that the addition of quantum mechanics can actually make the description of something more intuitively accessible.

In various places in the following text, I link to the corresponding section of a more mathematical discussion of this same topic (descriptive version | visual version). If you are interested in the equations, you can see them there, but if you're not, you don't have to.