How can the diameter of the universe be so big, if nothing can go faster than light?
5930
Why is the observable universe so big?
96657
The speed of light as it approaches a massive body
81663
Why does gravity travel at the speed of light?
8865
Could gravity accelerate light?
23253
According to Hubble's Law, how can the expansion of the Universe be accelerating?
102370
At what speed does our universe expand?
56005
Speed of light travel
54636
Dark Energy / Accelerating universe: naive question
139471
What if the size of the Universe doubled?
76637
Why aren't particles constantly "measured" by the whole universe?
65001
Universe from nothing?
2790
Can space expand with unlimited speed?
24445
How can an infinite universe expand?
63748
What does it mean that the universe is "infinite"?
75058
Why isn't an infinite, flat, nonexpanding universe filled with a uniform matter distribution a solution to Einstein's equation?
95674
Expansion of the Universe, will light from some galaxies never reach us?
26363
How does faster than light travel violate causality?