New posts in Spacetime

Why doesn't planet Earth expand if I accelerate upwards when standing on its surface?

Doubt on the need for Topological Manifolds

If mass curves spacetime, why do planets in a vacuum follow curved paths?

Connection between spatial, temporal, and spacetime curvature?

How does brain perceive time dilation due to gravity?

Why no gravity lens around planets?

General Relativity: Definition of Locally Inertial Frame

Can the Lorentz transformations be derived this way?

General Relativity: is Tangent Space Always Flat?

General Relativity at Microscopic Scale