Observed gravity of a fast moving particle relative to observer
3635
If a mass moves close to the speed of light, does it turn into a black hole?
123854
Would time speed up near a large body of negative mass relative to observers in micro gravity?
88879
Time dilation as an observer in special relativity
57305
Relativistic Mass and Gravity
17121
Kinetic energy with respect to different reference frames
75158
Is acceleration relative?
141791
What would be the associated wavelength of the particle if its velocity is zero?
77372
"Speed" of Gravity and Speed of Light
123571
A change in the gravitational law
56297
What is the status of existing measurements of the speed of gravity?
62964
Relativity: stationary vs moving
73660
Relativistic Doppler effect derivation
46050
How to describe arbitrary accelerations in special relativity
97847
Direct observations of a black hole?
56930
What would an observer see if he/she flew toward a clock at relativistic speeds?
141546
Time and distance in a photon's frame of reference
4350
Rotate a long bar in space and get close to (or even beyond) the speed of light $c$