What motion can emerge in a still universe?
125794
What is the origin of spin of celestial objects?
45708
Why do far away objects appear to move slowly in comparison to nearby objects?
54636
Dark Energy / Accelerating universe: naive question
125099
Beads in 'perpetual motion'?
110030
Superluminal expansion of the early universe how is this possible?
123854
Would time speed up near a large body of negative mass relative to observers in micro gravity?
7824
Particles reaching a singularity
54020
Does a moving object curve space-time as its velocity increases?
13251
Does a photon in vacuum have a rest frame?
143065
Fine Tuned Universe
9388
Can matter be described as the result of the curvature of space, instead of vice versa?
92674
Could spontaneous symmetry breaking happen again in our universe?
100434
Would there be centrifugal force if I were alone in the universe?
118815
What makes matter travel along geodesics?
34831
Are orbiting planets an  example of perpetual motion?
120538
Newton's First Law of Motion; Empirical Aspects
57098
Is perpetual motion impossible?