New posts in Reference Frames

Why isn't the center of the galaxy "younger" than the outer parts?

Locally flat coordinate and Locally inertial frame

A sees B's clock running slow and B sees A's clock running slow?

How do I transform onto a relativistic rotating frame of reference?

Why does an unhinged body rotate about its centre of mass?

Can all fundamental forces be fictitious forces?

Is torque independent of choice of the point of rotation?

Physical meaning of the angular momentum

How to know if a vehicle is moving without any external source of information?

How can a black hole reduce the speed of light?