New posts in Spacetime

Why are observers/reference frames able to see themselves moving through time but not through space?

Can we see the curvature of a surface?

Spacetime and its contribution to space science

Einstein's initial clue that spacetime is curved

Equivalence of two definitions of proper time in special relativity

Is the "spacetime" the same thing as the mathematical 4th dimension?

Why does nobody ever consider the possibility that the universe is not smooth?

How to travel between two stationary worlds in the least amount of time? (time dilation)

In Special Relativity, is it allowed to ask 'How much time has elapsed in a second inertial frame at a particular moment in the first inertial frame'?

If absolute velocity does not exist, how can we say a rocket accelerates in empty space?