>  I'm not sure if this depiction of Earth's gravity is correct. Earth's
> gravity increases as you get closer to it, using the usual formula.
> However, once you get inside Earth's surface and start going towards its
> center, the gravity decreases until at Earth's center there's zero 
> gravity.
>
>  OTOH, I must admit I don't know what is the common convention for
> depicting a gravity well as a plane. Is the plane displaced according to
> the strength of the gravity or according to the change in gravity with
> respect to the surroundings?

The slope of the plane represents the force of gravity.
The increased area of the surface near the gravity well
represents the increased volume of space-time...
the height is the inverse of the increased density of
space-time (it seems more correct for gravity to point down).
Space-time is one of those things that is difficult to
visualize, it's easier to think of gravity as a force, instead
of thinking of it as an expansion of space-time.

Post a reply to this message