New posts in Observers

Definition of observer and time measured by different observers in general relativity

Is there a frame of reference in which I was born before I was conceived?

What is physically different about a moving vs still object in space?

Twin paradox in curved space time

Does an expanding event horizon "swallow" nearby objects?

Is time sped up when orbiting a black hole? Why? What does that mean?

What if two twins flew off in opposite directions and were reunited in a perfectly symmetric way, would they have aged same?

How can a mechanical clock tick slower due to time dilation?

What does the accelerated twin see in the twin paradox?

Energy Conservation Dilemma