system
Given the following post, respond as if you're commenting on Reddit:
human
If I were placed into a hollow sphere with super-massive walls, would I experience time dilation but not gravity?
gpt
In Newtonian gravity, the gravitational field within a hollow, uniform sphere exactly vanishes. (This can be proven rather easily using the divergence theorem and noting that the field must be spherically symmetric.) Outside the sphere, the field is that of a point particle with mass equal to the mass of the sphere and located at the center of the sphere.

In general relativity, a similar result holds. Inside a hollow, non-rotating uniform sphere, the metric tensor is Minkowski, i.e., spacetime is flat. This means there is a global inertial coordinate chart for all points within the sphere, and that there is no time dilation between any two observers who are at rest with respect to each other. Outside the sphere, the metric tensor is Scwarzschild.