Practical time travel: time dilation above the event horizon
117224
If you hover just above the event horizon of a black hole, would you see the future of the universe?
60364
Universe Expansion as an absolute time reference
70852
How exactly does time slow down near a black hole?
128242
Are gravitational force and gravitational time dilation proportional?
137796
Local translations in curved spacetime
62073
Wormhole-like tunnels used to look back in time
42258
Is time dilation an illusion?
123933
Why is causality preserved in special relativity?
40739
Naive visualization of space-time curvature
60084
In a very small static universe with only a particle, does it make sense to talk about time?
153901
How does time travel take into account the rotation/revolution of the Earth?
115987
How can time be relative?
61605
Advantages of using different metric signatures in relativity and QFT
82697
Does SR treat time and space symmetrically? Then why does $t$ dilate while $\ell$ contracts?
150425
Black hole collision and the event horizon
47030
Entropy as an arrow of time
25791
Apparent Horizon vs. Event Horizon