New posts in Reference Frames

Very Massive Relativistic Body

Global Frame of Reference in General Relativity

If an object moving in a circle experiences centripetal force, then doesn't it also experience centrifugal force, because of Newton's third law?

How does Newtonian Gravity explain the difference between the experience of 1G and zero gravity? Or can it?

Comoving system of expanding or collapsing dust-like particles

Is the ADM Mass for a boosted black hole $M$ or $\gamma M$?

Blinking flashlight infalling into the black hole, as frequency → ∞

How is angular momentum conserved for the orbiting body if the centripetal force disappears?

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

Why haven't we yet tried accelerating a space station with people inside to a near light speed?