Does spacetime have a "preferred" speed/metric?
14036
What is so special about speed of light in vacuum?
2366
Is acceleration relative in relativity?
13786
A question in Special Relativity
106874
Does mass affect speed of orbit at a certain distance?
139987
Special Relativity, 2nd Postulate -- Why?
67127
Does the speed of light vary in non-inertial frames?
44566
Is (rest) mass conserved in special relativity?
17152
Do all massless particles (e.g. photon, graviton, gluon) necessarily have the same speed $c$?
122097
Is there a relativistic generalization of the Maxwell-Boltzmann velocity distribution?
122357
Discreteness of Spacetime and Violation of Lorentz symmetry
76894
Why is spacetime not Riemannian?
97246
Can gravity be interpreted as the acceleration of spacetime towards an object?
56297
What is the status of existing measurements of the speed of gravity?
77372
"Speed" of Gravity and Speed of Light
35663
Is there a formula that gives the position of an object depending on the time, but which doesn't allow the object to surpass the speed of light?
75788
Is spacetime absolute?
115786
Speed of gravitational waves and light