Expansion of space or contracting of matter?
47082
If spacetime itself is expanding, how could we ever tell?
89789
Spacelike interval and length contraction
15538
If the Universe is expanding, how is that galaxies run into each other?
151086
What bends fabric of space-time?
33676
Internal and external forces
63414
What are the pieces of evidence that universe is expanding?
149430
Why does the universe exhibit three large-scale spatial dimensions?
134940
How can a structure have infinite length and infinite surface area, but have finite volume?
69329
Something versus anything
95681
If the universe is 3D, how is space-time like a "fabric"?
1491
Correct spaces for quantum mechanics
36008
Please clarify how entropy increases when matter gravitationally coalesces
144274
Why mass & energy bend spacetime?
115190
Why is physical space equivalent to $\mathbb{R}^3$?
119747
What is the meaning of the "expansion of space"?
85665
Schwarzschild metric in expanding Universe
42343
Is spacetime all that exists?